{"id":8733,"date":"2026-05-07T13:57:33","date_gmt":"2026-05-07T05:57:33","guid":{"rendered":"https:\/\/leeknives.com\/?p=8733"},"modified":"2026-05-07T13:57:35","modified_gmt":"2026-05-07T05:57:35","slug":"420j2%e9%8b%bc","status":"publish","type":"post","link":"https:\/\/leeknives.com\/ja\/420j2-steel\/","title":{"rendered":"420J2\u92fc\uff1a\u7279\u6027\u3001\u7528\u9014\u3001\u5229\u70b9"},"content":{"rendered":"<p>420J2\u306f\u3001\u4f4e\u70ad\u7d20\u30fb\u9ad8\u30af\u30ed\u30e0\u30b9\u30c6\u30f3\u30ec\u30b9\u92fc\u3067\u3001\u786c\u5ea6\u306f\u4f4e\u3081\u3067\u3059\u3002\u3053\u306e\u3084\u3084\u67d4\u3089\u304b\u3044\u92fc\u306e\u4e3b\u306a\u7528\u9014\u306f\u3001\u4f4e\u4fa1\u683c\u306e\u30ca\u30a4\u30d5\u3001\u5916\u79d1\u7528\u5668\u5177\u3001\u30d8\u30a2\u30ab\u30c3\u30c8\u7528\u30cf\u30b5\u30df\u306a\u3069\u306e\u6c4e\u7528\u5668\u5177\u3067\u3059\u3002<\/p>\n\n\n\n<p>420J2\u92fc\u88fd\u306e\u30ca\u30a4\u30d5\u306f\u3001\u8010\u98df\u6027\u3068\u976d\u6027\u3092\u6c42\u3081\u308b\u30e6\u30fc\u30b6\u30fc\u306b\u3068\u3063\u3066\u9b45\u529b\u7684\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u4ed6\u306e\u92fc\u3068\u540c\u69d8\u306b\u3001\u3053\u306e\u512a\u308c\u305f\u7279\u6027\u306f\u4ed6\u306e\u7279\u6027\u306b\u5f71\u97ff\u3092\u4e0e\u3048\u307e\u3059\u3002&nbsp;<\/p>\n\n\n\n<p>\u3053\u306e\u8a18\u4e8b\u3067\u306f\u3001420J2\u92fc\u306e\u7d44\u6210\u3001\u7279\u6027\u3001\u305d\u3057\u3066\u4e00\u822c\u7684\u306a\u7279\u5fb4\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3001\u985e\u4f3c\u92fc\u3084\u7af6\u5408\u3059\u308b\u9ad8\u7d1a\u92fc\u3068\u6bd4\u8f03\u3057\u307e\u3059\u3002\u6700\u5f8c\u307e\u3067\u304a\u8aad\u307f\u3044\u305f\u3060\u304f\u3053\u3068\u3067\u3001\u3053\u306e\u92fc\u3067\u4f5c\u3089\u308c\u305f\u5203\u7269\u304c\u8ca9\u58f2\u306b\u9069\u3057\u305f\u88fd\u54c1\u3067\u3042\u308b\u304b\u3069\u3046\u304b\u304c\u304a\u5206\u304b\u308a\u3044\u305f\u3060\u3051\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Quick verdict: Is 420J2 steel good for knives?<\/h2>\n\n\n\n<p><strong>420J2 is a budget-tier martensitic stainless steel (JIS SUS420J2)<\/strong>&nbsp;primarily known for its&nbsp;<strong>extreme corrosion resistance<\/strong>&nbsp;\u305d\u3057\u3066&nbsp;<strong>high toughness<\/strong>, but relatively low hardness (typically 52-55 HRC).<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u6700\u9069\u306a\u7528\u9014:<\/strong>&nbsp;Diving knives, surgical scalpels, liner locks, and as a cladding material for high-carbon cores (San Mai).<\/li>\n\n\n\n<li><strong>\u9577\u6240:<\/strong>&nbsp;Virtually rust-proof, very easy to sharpen, and highly resistant to chipping.<\/li>\n\n\n\n<li><strong>\u77ed\u6240:<\/strong>&nbsp;Poor edge retention compared to 440C or VG10; needs frequent honing if used for heavy cutting.<\/li>\n\n\n\n<li><strong>Bottom Line for Retailers:<\/strong>&nbsp;It is an excellent choice for entry-level EDC or specialty saltwater tools where rust prevention is more critical than long-lasting sharpness.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">420J2\u92fc\u306e\u7d44\u6210<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u70ad\u7d20\uff1a <\/strong>0.15 to 0.36%: increases hardness, wear resistance, and strength<\/li>\n\n\n\n<li><strong>Chromium: <\/strong>12 to 14%: greatly improves corrosion resistance, toughness, and hardness<\/li>\n\n\n\n<li><strong>Nickel:<\/strong> 1%: improves strength, toughness, and corrosion resistance at high temperatures<\/li>\n\n\n\n<li><strong>Silicon: <\/strong>1%: removes impurities from the steel and increases hardenability<\/li>\n\n\n\n<li><strong>Manganese: <\/strong>1%: boosts strength and decreases brittleness<\/li>\n<\/ul>\n\n\n\n<p>\u591a\u304f\u306e\u60c5\u5831\u6e90\u306b\u3088\u308b\u3068\u3001420J2\u92fc\u306e\u70ad\u7d20\u542b\u6709\u91cf\u306f0.32%\u3067\u3059\u3002\u3053\u308c\u306f\u4e0a\u8a18\u306e\u7bc4\u56f2\u5185\u3067\u3059\u304c\u3001\u3059\u3079\u3066\u306e420J2\u92fc\u306b0.32%\u306e\u70ad\u7d20\u304c\u542b\u307e\u308c\u3066\u3044\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002 <a href=\"http:\/\/zknives.com\/knives\/steels\/420j2.shtml\" target=\"_blank\" rel=\"noopener\">0.15\uff5e0.36%\u306e\u7bc4\u56f2<\/a>.&nbsp;<\/p>\n\n\n\n<p>\u3055\u3089\u306b\u3001420J2\u92fc\u306f\u4ed6\u306e\u591a\u304f\u306e\u92fc\u7a2e\u3068\u540c\u69d8\u306b\u30010.04%\u672a\u6e80\u306e\u5fae\u91cf\u306e\u30ea\u30f3\u3068\u786b\u9ec4\u3092\u542b\u3093\u3067\u3044\u307e\u3059\u3002\u3053\u308c\u3089\u306f\u5408\u91d1\u5143\u7d20\u3067\u306f\u306a\u304f\u4e0d\u7d14\u7269\u3067\u3042\u308a\u3001\u3053\u306e\u3088\u3046\u306a\u5fae\u91cf\u3067\u3042\u308c\u3070\u52a0\u5de5\u6027\u3092\u5411\u4e0a\u3055\u305b\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">420J2\u30b9\u30c6\u30f3\u30ec\u30b9\u92fc\u306e\u7279\u6027<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/420J2-stainless-steel-properties-1.jpg\"><img decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/420J2-stainless-steel-properties-1.jpg\" alt=\"420J2\u30b9\u30c6\u30f3\u30ec\u30b9\u92fc\u306e\u7279\u6027\" class=\"wp-image-19759\" style=\"aspect-ratio:4\/3;object-fit:cover\" srcset=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/420J2-stainless-steel-properties-1.jpg 1920w, https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/420J2-stainless-steel-properties-1-768x432.jpg 768w, https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/420J2-stainless-steel-properties-1-1536x864.jpg 1536w, https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/420J2-stainless-steel-properties-1-18x10.jpg 18w, https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/420J2-stainless-steel-properties-1-600x338.jpg 600w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/><\/a><\/figure>\n\n\n\n<p>\u3053\u3053\u3067\u306f\u3001420J2 \u92fc\u306e\u5316\u5b66\u7d44\u6210\u304c\u305d\u306e\u7279\u6027\u306b\u3069\u306e\u3088\u3046\u306b\u53cd\u6620\u3055\u308c\u308b\u304b\u3092\u3001\u6700\u3082\u91cd\u8981\u306a\u5074\u9762\u3092\u4e2d\u5fc3\u306b\u8aac\u660e\u3057\u307e\u3059\u3002<\/p>\n\n\n<div class=\"gb-container gb-container-7271ea33\">\n<div class=\"gb-container gb-container-5e6a0301\">\n\n<h3 class=\"wp-block-heading\">\u786c\u5ea6<\/h3>\n\n<\/div>\n<\/div>\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/testing-hardness-of-steel.jpg\"><img decoding=\"async\" width=\"959\" height=\"633\" src=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/testing-hardness-of-steel.jpg\" alt=\"\u92fc\u306e\u786c\u5ea6\u8a66\u9a13\" class=\"wp-image-8744\" srcset=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/testing-hardness-of-steel.jpg 959w, https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/testing-hardness-of-steel-768x507.jpg 768w, https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/testing-hardness-of-steel-600x396.jpg 600w\" sizes=\"(max-width: 959px) 100vw, 959px\" \/><\/a><\/figure>\n\n\n\n<p>\u5e73\u5747 <a href=\"https:\/\/leeknives.com\/ja\/%e3%83%ad%e3%83%83%e3%82%af%e3%82%a6%e3%82%a7%e3%83%ab%e7%a1%ac%e5%ba%a6%e3%82%b9%e3%82%b1%e3%83%bc%e3%83%ab\/\">\u786c\u5ea6\u8a55\u4fa1<\/a> 420J2\u92fc\u306eHRc\u306f54\u3067\u3059\u3002\u305f\u3060\u3057\u3001\u71b1\u51e6\u7406\u306b\u3088\u3063\u3066\u82e5\u5e72\u5909\u5316\u3059\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002420J2\u3068\u540c\u7a0b\u5ea6\u306e\u70ad\u7d20\u542b\u6709\u91cf\u306e\u92fc\u306e\u591a\u304f\u306f\u3001\u305d\u308c\u3088\u308a\u3082\u304b\u306a\u308a\u8edf\u3089\u304b\u3044\u305f\u3081\u3001\u3053\u306e\u6570\u5024\u306f\u5370\u8c61\u7684\u3067\u3059\u3002&nbsp;<\/p>\n\n\n\n<p>420J2\u92fc\u306f\u7279\u306b\u786c\u3044\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u4e2d\u7a0b\u5ea6\u306e\u6027\u80fd\u306b\u5fc5\u8981\u306a\u786c\u5ea6\u3092\u5099\u3048\u3066\u3044\u307e\u3059\u3002\u307b\u3068\u3093\u3069\u306e\u5834\u5408\u3001\u5341\u5206\u306a\u786c\u3055\u304c\u3042\u308a\u3001\u7528\u9014\u306b\u3088\u3063\u3066\u306f\u597d\u307e\u3057\u3044\u5203\u306e\u786c\u3055\u3067\u3059\u3002\u885d\u6483\u306b\u3082\u5f37\u3044\u9811\u4e08\u306a\u30ca\u30a4\u30d5\u3092\u6c42\u3081\u308b\u30e6\u30fc\u30b6\u30fc\u306b\u3068\u3063\u3066\u3001420J2\u92fc\u306e\u786c\u5ea6\u306f\u5927\u304d\u306a\u30e1\u30ea\u30c3\u30c8\u3068\u306a\u308a\u307e\u3059\u3002\u305f\u3060\u3057\u3001\u597d\u307f\u306b\u3088\u3063\u3066\u306f\u3001\u3053\u306e\u786c\u5ea6\u304c\u7269\u8db3\u308a\u306a\u3044\u3068\u611f\u3058\u308b\u4eba\u3082\u3044\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n\n\n<style>.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id1072_279893-d1{margin-bottom:0px;margin-top:20px;margin-bottom:40px;}.kb-row-layout-id1072_279893-d1 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id1072_279893-d1 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id1072_279893-d1 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-none, 0rem );row-gap:var(--global-kb-gap-md, 2rem);padding-top:25px;padding-right:25px;padding-bottom:25px;padding-left:25px;grid-template-columns:minmax(0, calc(60% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)))minmax(0, calc(40% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)));}.kb-row-layout-id1072_279893-d1{border-top:1px solid var(--base);border-bottom:1px solid var(--base);}.kb-row-layout-id1072_279893-d1 > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id1072_279893-d1 > .kt-row-column-wrap{grid-template-columns:repeat(2, minmax(0, 1fr));}}@media all and (max-width: 1024px){.kb-row-layout-id1072_279893-d1{border-top:1px solid var(--base);border-bottom:1px solid var(--base);}}@media all and (max-width: 767px){.kb-row-layout-id1072_279893-d1 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id1072_279893-d1{border-top:1px solid var(--base);border-bottom:1px solid var(--base);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id1072_279893-d1 alignnone wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column1072_81469c-af > .kt-inside-inner-col{display:flex;}.kadence-column1072_81469c-af > .kt-inside-inner-col{padding-top:0px;}.kadence-column1072_81469c-af > .kt-inside-inner-col,.kadence-column1072_81469c-af > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1072_81469c-af > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1072_81469c-af > .kt-inside-inner-col{flex-direction:column;justify-content:flex-start;}.kadence-column1072_81469c-af > .kt-inside-inner-col > .aligncenter{width:100%;}.kt-row-column-wrap > .kadence-column1072_81469c-af{align-self:flex-start;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_81469c-af{align-self:auto;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_81469c-af > .kt-inside-inner-col{flex-direction:column;justify-content:flex-start;}.kadence-column1072_81469c-af > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1072_81469c-af{position:relative;}.kadence-column1072_81469c-af, .kt-inside-inner-col > .kadence-column1072_81469c-af:not(.specificity){margin-top:0px;}@media all and (max-width: 1024px){.kt-row-column-wrap > .kadence-column1072_81469c-af{align-self:flex-start;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_81469c-af{align-self:auto;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_81469c-af > .kt-inside-inner-col{flex-direction:column;justify-content:flex-start;}}@media all and (max-width: 1024px){.kadence-column1072_81469c-af > .kt-inside-inner-col{flex-direction:column;justify-content:flex-start;}}@media all and (max-width: 767px){.kt-row-column-wrap > .kadence-column1072_81469c-af{align-self:flex-start;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_81469c-af{align-self:auto;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_81469c-af > .kt-inside-inner-col{flex-direction:column;justify-content:flex-start;}.kadence-column1072_81469c-af > .kt-inside-inner-col{flex-direction:column;justify-content:flex-start;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1072_81469c-af inner-column-1\"><div class=\"kt-inside-inner-col\">\n<p class=\"gb-headline gb-headline-19c3a788 gb-headline-text\">\u5378\u58f2\u30ca\u30a4\u30d5\u3092\u8cfc\u5165\u3057\u3066\u3001\u4eca\u3059\u3050\u79c1\u305f\u3061\u3068\u4e00\u7dd2\u306b\u30b9\u30b1\u30fc\u30eb\u30a2\u30c3\u30d7\u3092\u59cb\u3081\u307e\u3057\u3087\u3046<\/p>\n\n\n\n<p class=\"gb-headline gb-headline-6a4f6af2 gb-headline-text\">\u5f0a\u793e\u306b\u304a\u554f\u3044\u5408\u308f\u305b\u3044\u305f\u3060\u304d\u3001\u55b6\u696d\u62c5\u5f53\u8005\u3068\u9023\u7d61\u3092\u53d6\u308a\u3001\u7121\u6599\u306e\u898b\u7a4d\u3082\u308a\u3092\u5165\u624b\u3057\u3066\u304f\u3060\u3055\u3044\u3002&nbsp;<\/p>\n<\/div><\/div>\n\n\n<style>.kadence-column1072_95d379-db > .kt-inside-inner-col{display:flex;}.kadence-column1072_95d379-db > .kt-inside-inner-col,.kadence-column1072_95d379-db > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1072_95d379-db > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1072_95d379-db > .kt-inside-inner-col{flex-direction:column;justify-content:center;}.kadence-column1072_95d379-db > .kt-inside-inner-col > .aligncenter{width:100%;}.kt-row-column-wrap > .kadence-column1072_95d379-db{align-self:center;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_95d379-db{align-self:auto;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_95d379-db > .kt-inside-inner-col{flex-direction:column;justify-content:center;}.kadence-column1072_95d379-db > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1072_95d379-db{position:relative;}@media all and (max-width: 1024px){.kt-row-column-wrap > .kadence-column1072_95d379-db{align-self:center;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_95d379-db{align-self:auto;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_95d379-db > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 1024px){.kadence-column1072_95d379-db > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kt-row-column-wrap > .kadence-column1072_95d379-db{align-self:center;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_95d379-db{align-self:auto;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_95d379-db > .kt-inside-inner-col{flex-direction:column;justify-content:center;}.kadence-column1072_95d379-db > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1072_95d379-db inner-column-2\"><div class=\"kt-inside-inner-col\"><style>.wp-block-kadence-advancedbtn.kb-btns1072_2314fb-61{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:flex-end;align-items:center;}.kt-btns1072_2314fb-61 .kt-button{font-weight:normal;font-style:normal;}@media all and (max-width: 767px){.wp-block-kadence-advancedbtn.kb-btns1072_2314fb-61{justify-content:flex-start;}}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns1072_2314fb-61\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn1072_41732e-2f.kb-button{width:initial;}.wp-block-kadence-advancedbtn .kb-btn1072_41732e-2f.kb-button{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}<\/style><a class=\"kb-button kt-button button kb-btn1072_41732e-2f kt-btn-size-standard kt-btn-width-type-auto kb-btn-global-inherit  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-button__link wp-block-kadence-singlebtn\" href=\"https:\/\/leeknives.com\/ja\/%e8%a6%8b%e7%a9%8d%e3%82%82%e3%82%8a%e3%82%92%e4%be%9d%e9%a0%bc%e3%81%99%e3%82%8b\/\"><span class=\"kt-btn-inner-text\">\u898b\u7a4d\u3082\u308a\u4f9d\u983c<\/span><\/a><\/div>\n<\/div><\/div>\n\n<\/div><\/div>\n\n\n<h3 class=\"wp-block-heading\">\u8010\u6469\u8017\u6027<\/h3>\n\n\n\n<p>\u8010\u6469\u8017\u6027\u3068\u306f\u3001\u92fc\u6750\u304c\u6469\u8017\u3084\u640d\u50b7\u306b\u8010\u3048\u308b\u80fd\u529b\u3092\u6307\u3057\u307e\u3059\u3002420J2\u92fc\u306f\u3001\u904e\u9177\u306a\u4f7f\u7528\u6761\u4ef6\u3067\u306f\u8010\u6469\u8017\u6027\u304c\u4f4e\u4e0b\u3057\u307e\u3059\u3002420J2\u92fc\u306e\u8010\u6469\u8017\u6027\u306f\u3001\u70ad\u7d20\u542b\u6709\u91cf\u306e\u4f4e\u3055\u306b\u3088\u3063\u3066\u4f4e\u4e0b\u3057\u307e\u3059\u3002&nbsp;<\/p>\n\n\n\n<p>\u3053\u306e\u8010\u6469\u8017\u6027\u306e\u4f4e\u3055\u306f\u3001\u4e00\u822c\u7684\u306a\u30ca\u30a4\u30d5\u30e6\u30fc\u30b6\u30fc\u306b\u3068\u3063\u3066\u3044\u304f\u3064\u304b\u306e\u554f\u984c\u3092\u610f\u5473\u3057\u307e\u3059\u3002\u307e\u305a\u7b2c\u4e00\u306b\u3001\u5203\u306b\u306f\u907f\u3051\u3089\u308c\u306a\u3044\u50b7\u304c\u4ed8\u304d\u307e\u3059\u3002\u4f7f\u7528\u3057\u3066\u3044\u304f\u3046\u3061\u306b\u3001\u3053\u308c\u3089\u306e\u50b7\u306f\u304b\u306a\u308a\u6df1\u304f\u3001\u6563\u3089\u3070\u308b\u3088\u3046\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u898b\u305f\u76ee\u306e\u554f\u984c\u306b\u904e\u304e\u307e\u305b\u3093\u304c\u3001\u591a\u304f\u306e\u30e6\u30fc\u30b6\u30fc\u306f\u7814\u3050\u969b\u306b\u5203\u3092\u78e8\u304f\u3053\u3068\u3092\u9078\u629e\u3057\u307e\u3059\u3002\u3053\u308c\u304c\u6b21\u306e\u70b9\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>420J2\u92fc\u306e\u8010\u6469\u8017\u6027\u304c\u4f4e\u3044\u3053\u3068\u306f\u3001\u5fc5\u305a\u3057\u3082\u60aa\u3044\u3053\u3068\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u6469\u8017\u306b\u305d\u308c\u307b\u3069\u5f37\u304f\u306a\u3044\u5206\u3001\u7814\u304e\u3084\u3059\u3044\u306e\u3067\u3059\u3002\u6a19\u6e96\u7684\u306a\uff08\u305d\u3057\u3066\u5b89\u4fa1\u306a\uff09\u7814\u78e8\u5668\u5177\u3092\u4f7f\u3063\u3066\u3082\u3001420J2\u92fc\u306e\u30ca\u30a4\u30d5\u3092\u92ed\u3044\u5207\u308c\u5473\u306b\u3059\u308b\u306e\u306f\u305d\u308c\u307b\u3069\u624b\u9593\u304c\u304b\u304b\u308a\u307e\u305b\u3093\u3002\u7c97\u76ee\u306e\u7825\u77f3\u3067\u6570\u56de\u7814\u3050\u3060\u3051\u3067\u3001\u6570\u5206\u3067\u92ed\u3044\u5207\u308c\u5473\u3092\u53d6\u308a\u623b\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u8010\u98df\u6027<\/h3>\n\n\n\n<p>420J2\u92fc\u306e\u6700\u5927\u306e\u5f37\u307f\u306f\u3001\u304a\u305d\u3089\u304f\u8010\u98df\u6027\u3067\u3057\u3087\u3046\u3002\u70ad\u7d20\u542b\u6709\u91cf\u304c\u5c11\u306a\u304f\u3001\u30af\u30ed\u30e0\u542b\u6709\u91cf\u304c\u6700\u592714%\u3068\u9ad8\u3044\u305f\u3081\u3001420J2\u306f\u904e\u9177\u306a\u6761\u4ef6\u4e0b\u3067\u3082\u9178\u5316\u3057\u306a\u3044\u5203\u3092\u5b9f\u73fe\u3057\u307e\u3059\u3002\u6c34\u3060\u3051\u3067\u306a\u304f\u3001\u9178\u3084\u30a2\u30f3\u30e2\u30cb\u30a2\u306b\u3082\u9306\u3073\u306b\u304f\u3044\u306e\u304c\u7279\u5fb4\u3067\u3059\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/corrosion-resistance-of-420j2-steel.jpg\"><img decoding=\"async\" width=\"957\" height=\"637\" src=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/corrosion-resistance-of-420j2-steel.jpg\" alt=\"420j2\u92fc\u306e\u8010\u98df\u6027\" class=\"wp-image-8748\" srcset=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/corrosion-resistance-of-420j2-steel.jpg 957w, https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/corrosion-resistance-of-420j2-steel-768x511.jpg 768w, https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/corrosion-resistance-of-420j2-steel-600x399.jpg 600w\" sizes=\"(max-width: 957px) 100vw, 957px\" \/><\/a><\/figure>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306a\u6975\u9650\u74b0\u5883\u4e0b\u3067\u3082\u8010\u8150\u98df\u6027\u3092\u6301\u3064\u305f\u3081\u3001\u30e1\u30fc\u30ab\u30fc\u306f\u3053\u3046\u3057\u305f\u72b6\u6cc1\u3092\u8003\u616e\u3057\u305f\u88fd\u54c1\u3092\u958b\u767a\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067\u3059\u3002\u4f8b\u3048\u3070\u3001\u9ad8\u54c1\u8cea\u306a\u30c0\u30a4\u30d3\u30f3\u30b0\u30ca\u30a4\u30d5\u3092\u8ca9\u58f2\u3059\u308b\u306a\u3069\u3001\u5e97\u8217\u30aa\u30fc\u30ca\u30fc\u306b\u3068\u3063\u3066\u9069\u5207\u306a\u9867\u5ba2\u5c64\u3078\u306e\u8a34\u6c42\u529b\u3092\u9ad8\u3081\u308b\u3053\u3068\u306b\u3082\u3064\u306a\u304c\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u3053\u306e\u7279\u6027\u3060\u3051\u3067\u3082\u3001420J2\u92fc\u306f\u4eba\u6c17\u3092\u535a\u3057\u3066\u3044\u307e\u3059\u3002\u8010\u98df\u6027\u304c\u7279\u306b\u6c42\u3081\u3089\u308c\u308b\u7528\u9014\u306b\u304a\u3044\u3066\u3001\u975e\u5e38\u306b\u6e80\u8db3\u306e\u3044\u304f\u5203\u7269\u3092\u751f\u307f\u51fa\u3059\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u5f37\u976d\u3055<\/h3>\n\n\n\n<p>\u3053\u306e\u786c\u5ea6\u306e\u985e\u4f3c\u92fc\u3068\u540c\u69d8\u306b\u3001420J2\u92fc\u306f\u512a\u308c\u305f\u976d\u6027\u3092\u5099\u3048\u3066\u3044\u307e\u3059\u3002\u885d\u6483\u3092\u53d7\u3051\u3066\u3082\u640d\u50b7\u3001\u6b20\u3051\u3001\u7834\u640d\u3059\u308b\u53ef\u80fd\u6027\u306f\u4f4e\u3044\u3067\u3059\u3002\u3053\u306e\u8010\u4e45\u6027\u306b\u3088\u308a\u3001\u3053\u306e\u92fc\u306f\u904e\u9177\u306a\u7528\u9014\u306b\u6700\u9069\u3067\u3059\u3002\u6fc0\u3057\u3044\u85aa\u5272\u308a\u304b\u3089\u6728\u6750\u306e\u76ae\u5265\u304e\u307e\u3067\u3001420J2\u92fc\u306e\u976d\u6027\u306f\u591a\u304f\u306e\u904e\u9177\u306a\u4f5c\u696d\u306b\u8010\u3048\u307e\u3059\u3002\u8010\u6469\u8017\u6027\u304c\u4f4e\u3044\u305f\u3081\u50b7\u304c\u4ed8\u304f\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u8010\u4e45\u6027\u306b\u306f\u5f71\u97ff\u3057\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001420J2 \u92fc\u306f\u5f15\u5f35\u5f37\u5ea6\u306b\u512a\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u5203\u304c\u66f2\u304c\u3063\u3066\u3082\u5927\u304d\u306a\u554f\u984c\u306b\u306f\u306a\u308a\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u30a8\u30c3\u30b8\u4fdd\u6301<\/h3>\n\n\n\n<p>\u3053\u308c\u3089\u3059\u3079\u3066\u3092\u8e0f\u307e\u3048\u308b\u3068\u3001\u5203\u6301\u3061\u306e\u826f\u3055\u304c\u6d6e\u304b\u3073\u4e0a\u304c\u308a\u307e\u3059\u3002\u3053\u308c\u306f\u3001\u307b\u3068\u3093\u3069\u306e\u30e6\u30fc\u30b6\u30fc\u306b\u3068\u3063\u3066\u30ca\u30a4\u30d5\u92fc\u6750\u306b\u304a\u3044\u3066\u6700\u3082\u91cd\u8981\u306a\u7279\u6027\u3067\u3059\u3002\u6b8b\u5ff5\u306a\u304c\u3089\u3001420J2\u92fc\u306e\u5203\u6301\u3061\u306e\u826f\u3055\u306f\u3001\u8010\u8150\u98df\u6027\u3084\u976d\u6027\u307b\u3069\u512a\u308c\u3066\u3044\u307e\u305b\u3093\u3002\u8010\u6469\u8017\u6027\u304c\u4f4e\u304f\u3001\u92fc\u6750\u306e\u786c\u5ea6\u3082\u305d\u308c\u307b\u3069\u9ad8\u304f\u306a\u3044\u305f\u3081\u3001\u5203\u6301\u3061\u306e\u826f\u3044\u30ca\u30a4\u30d5\u306f\u5b9f\u73fe\u3067\u304d\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<p>420J2\u92fc\u306e\u30ca\u30a4\u30d5\u3092\u624b\u306b\u53d6\u3063\u3066\u4f55\u6642\u9593\u3082\u4f7f\u7528\u3059\u308b\u3068\u30011\u6642\u9593\u3054\u3068\u306b\u5207\u308c\u5473\u304c\u8457\u3057\u304f\u4f4e\u4e0b\u3059\u308b\u3053\u3068\u3092\u899a\u609f\u3057\u3066\u304f\u3060\u3055\u3044\u3002\u786c\u5ea6\u304c\u4f4e\u304f\u8010\u6469\u8017\u6027\u304c\u4f4e\u3044\u305f\u3081\u3001\u5203\u6301\u3061\u3082\u60aa\u304f\u306a\u308a\u307e\u3059\u3002&nbsp;<\/p>\n\n\n\n<p>\u3068\u306f\u3044\u3048\u3001\u5207\u308c\u5473\u304c\u3059\u3050\u306b\u843d\u3061\u3066\u3057\u307e\u3046\u3068\u3044\u3046\u6b20\u70b9\u304c\u3042\u308b\u306b\u3082\u304b\u304b\u308f\u3089\u305a\u3001420J2\u92fc\u306f\u7814\u304e\u3084\u3059\u3044\u3068\u3044\u3046\u5229\u70b9\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306e\u30c8\u30ec\u30fc\u30c9\u30aa\u30d5\u306f\u3001\u5203\u6301\u3061\u304c\u81ea\u5206\u306e\u7528\u9014\u306b\u306f\u7269\u8db3\u308a\u306a\u3044\u3068\u611f\u3058\u308b\u8cfc\u5165\u8005\u306b\u3068\u3063\u3066\u3001\u8cfc\u5165\u3092\u518d\u691c\u8a0e\u3059\u308b\u304d\u3063\u304b\u3051\u3068\u306a\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Expert manufacturing insight: Heat treatment for 420J2<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/Expert-manufacturing-insight-Heat-treatment-for-420J2.jpg\"><img decoding=\"async\" width=\"699\" height=\"534\" src=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/Expert-manufacturing-insight-Heat-treatment-for-420J2.jpg\" alt=\"Expert manufacturing insight Heat treatment for 420J2\" class=\"wp-image-19760\" srcset=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/Expert-manufacturing-insight-Heat-treatment-for-420J2.jpg 699w, https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/Expert-manufacturing-insight-Heat-treatment-for-420J2-16x12.jpg 16w, https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/Expert-manufacturing-insight-Heat-treatment-for-420J2-600x458.jpg 600w\" sizes=\"(max-width: 699px) 100vw, 699px\" \/><\/a><\/figure>\n\n\n\n<p>To unlock the full potential of 420J2 steel, precise heat treatment is non-negotiable. While it is a budget-friendly alloy, a professional manufacturing process can significantly improve its performance and durability.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">The standard heat treatment protocol<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Austenitizing\/Quenching:<\/strong>&nbsp;The steel is heated to a temperature range of&nbsp;<strong>1750\u00b0F to 1900\u00b0F (950\u00b0C to 1040\u00b0C)<\/strong>. It is then held at this temperature to ensure uniform carbon distribution before being&nbsp;<strong>oil-quenched<\/strong>.<\/li>\n\n\n\n<li><strong>\u713c\u304d\u623b\u3057\uff1a<\/strong>&nbsp;After quenching, the steel is tempered between&nbsp;<strong>300\u00b0F and 400\u00b0F (150\u00b0C to 200\u00b0C)<\/strong>. This stage is critical to relieving internal stresses and stabilizing the hardness.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Performance outcome<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Optimal Hardness:<\/strong>&nbsp;Properly treated 420J2 typically reaches&nbsp;<strong>54-56 HRC<\/strong>. This level provides enough strength for daily cutting while maintaining the steel&#8217;s signature high toughness.<\/li>\n\n\n\n<li><strong>Manufacturer Tip:<\/strong>&nbsp;For applications like&nbsp;<strong>diving knives<\/strong>&nbsp;\u307e\u305f\u306f&nbsp;<strong>multi-tools<\/strong>, we recommend a slightly lower tempering hardness (approx. 53-54 HRC) to maximize impact resistance and ensure the blade remains flexible enough to resist snapping under heavy torque.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Common applications of 420J2 steel<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/Common-applications-of-420J2-steel.jpg\"><img decoding=\"async\" width=\"1200\" height=\"896\" src=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/Common-applications-of-420J2-steel.jpg\" alt=\"Common applications of 420J2 steel\" class=\"wp-image-19761\" srcset=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/Common-applications-of-420J2-steel.jpg 1200w, https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/Common-applications-of-420J2-steel-768x573.jpg 768w, https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/Common-applications-of-420J2-steel-16x12.jpg 16w, https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/Common-applications-of-420J2-steel-600x448.jpg 600w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/a><\/figure>\n\n\n\n<p>Due to its unique combination of extreme rust resistance and high impact toughness, 420J2 is the industry standard for specific high-stakes environments:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Diving &amp; Saltwater Knives:<\/strong>&nbsp;Its ability to resist corrosion from salt, acids, and chemicals makes it the top choice for underwater tools where even premium steels might rust.<\/li>\n\n\n\n<li><strong>Surgical &amp; Medical Instruments:<\/strong>&nbsp;420J2 is widely used for scalpels and forceps because it can be polished to a mirror finish, is easy to sterilize, and is cost-effective for disposable or high-turnover medical tools.<\/li>\n\n\n\n<li><strong>Multi-tool Liners &amp; Lock Bars:<\/strong>&nbsp;In the manufacturing of folding knives, 420J2 is often used for internal components like liners and frames because it provides structural integrity without the high cost of premium alloys.<\/li>\n\n\n\n<li><strong>Entry-Level EDC &amp; Training Knives:<\/strong>&nbsp;For budget-friendly <a href=\"https:\/\/leeknives.com\/ja\/%e3%83%9d%e3%82%b1%e3%83%83%e3%83%88%e3%83%8a%e3%82%a4%e3%83%95\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u30dd\u30b1\u30c3\u30c8\u30ca\u30a4\u30d5<\/a> or practice tools (like butterfly trainers), 420J2 offers a safe, durable, and easily maintainable option for beginners.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">420J2 as a cladding material (San Mai construction)<\/h2>\n\n\n\n<p>While 420J2 is often categorized as a &#8220;budget&#8221; steel, it plays a vital role in high-end cutlery as a&nbsp;<strong>cladding material<\/strong>. In traditional Japanese &#8220;San Mai&#8221; or laminated blades, a hard core (such as <a href=\"https:\/\/leeknives.com\/ja\/vg-10-%e3%82%b9%e3%83%81%e3%83%bc%e3%83%ab\/\" target=\"_blank\" rel=\"noreferrer noopener\">VG10<\/a> \u307e\u305f\u306f <a href=\"https:\/\/leeknives.com\/ja\/sg2%e3%82%b9%e3%83%81%e3%83%bc%e3%83%ab\/\" target=\"_blank\" rel=\"noreferrer noopener\">SG2<\/a>) is sandwiched between two outer layers of 420J2.<\/p>\n\n\n\n<p>In this construction, the 420J2 acts as a protective &#8220;jacket&#8221; that provides two critical benefits:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Rust Protection:<\/strong>&nbsp;It shields the high-carbon core from oxidation, making the knife much easier to maintain.<\/li>\n\n\n\n<li><strong>Structural Flexibility:<\/strong>&nbsp;The high toughness of 420J2 compensates for the brittleness of the hard core, preventing the blade from snapping or cracking under stress.<\/li>\n<\/ul>\n\n\n\n<p>For knife brands and retailers, offering 420J2-clad blades is a smart way to provide the extreme sharpness of premium steel with the durability and low maintenance of stainless steel.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">420J2\u3068\u4ed6\u306e\u92fc<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/420J2-vs.-other-steel.jpg\"><img decoding=\"async\" width=\"957\" height=\"636\" src=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/420J2-vs.-other-steel.jpg\" alt=\"420J2\u3068\u4ed6\u306e\u92fc\" class=\"wp-image-8749\" srcset=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/420J2-vs.-other-steel.jpg 957w, https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/420J2-vs.-other-steel-768x510.jpg 768w, https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/420J2-vs.-other-steel-600x399.jpg 600w\" sizes=\"(max-width: 957px) 100vw, 957px\" \/><\/a><\/figure>\n\n\n\n<p>420J2 \u92fc\u3068\u4ed6\u306e\u92fc\u3068\u306e\u6bd4\u8f03\u3092\u7c21\u5358\u306b\u8aac\u660e\u3057\u307e\u3059\u3002&nbsp;<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>\u92fc\u9244<\/th><th>\u30a8\u30c3\u30b8\u4fdd\u6301<\/th><th>\u8010\u6469\u8017\u6027<\/th><th>\u8010\u98df\u6027<\/th><th>\u5f37\u976d\u3055<\/th><th>\u786c\u5ea6\uff08HRC\uff09<\/th><th>Cost Level<\/th><th>Best Use Case<\/th><\/tr><\/thead><tbody><tr><td><strong>420J2<\/strong><\/td><td>\u2b50<\/td><td>\u2b50<\/td><td>\u2b50\u2b50\u2b50\u2b50\u2b50<\/td><td>\u2b50\u2b50\u2b50\u2b50<\/td><td>~54<\/td><td>$<\/td><td>Diving knives, surgical tools, rust-critical environments<\/td><\/tr><tr><td><strong>3Cr13<\/strong><\/td><td>\u2b50<\/td><td>\u2b50<\/td><td>\u2b50\u2b50\u2b50\u2b50\u2b50<\/td><td>\u2b50\u2b50\u2b50\u2b50<\/td><td>~54<\/td><td>$<\/td><td>Budget knives, entry-level EDC<\/td><\/tr><tr><td><strong>440A<\/strong><\/td><td>\u2b50\u2b50\u2b50<\/td><td>\u2b50\u2b50\u2b50<\/td><td>\u2b50\u2b50\u2b50\u2b50<\/td><td>\u2b50\u2b50\u2b50<\/td><td>~55\u201357<\/td><td>$$<\/td><td>General EDC, hunting knives, budget performance knives<\/td><\/tr><tr><td><strong>5Cr15MoV<\/strong><\/td><td>\u2b50\u2b50\u2b50\u2b50<\/td><td>\u2b50\u2b50\u2b50<\/td><td>\u2b50\u2b50\u2b50\u2b50<\/td><td>\u2b50\u2b50\u2b50\u2b50<\/td><td>~55\u201357<\/td><td>$$<\/td><td>Kitchen knives, better all-round budget stainless blades<\/td><\/tr><tr><td><strong>420HC<\/strong><\/td><td>\u2b50\u2b50\u2b50\u2b50<\/td><td>\u2b50\u2b50\u2b50\u2b50<\/td><td>\u2b50\u2b50\u2b50\u2b50<\/td><td>\u2b50\u2b50\u2b50<\/td><td>~56\u201359<\/td><td>$$$<\/td><td>EDC knives, hunting knives, daily utility knives<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">420J2 vs. 3Cr13\u92fc<\/h3>\n\n\n\n<p>3Cr13 is the closest alternative to 420J2 steel. Both steels have almost identical carbon and chromium content and have the same silicon and manganese amount. The noticeable difference in the chemical composition is that <a href=\"https:\/\/leeknives.com\/ja\/3cr13%e9%8b%bc\/\" target=\"_blank\" rel=\"noreferrer noopener\">3Cr13 steel<\/a> 0.60%\u3067\u306f420J2\u92fc\u3088\u308a\u3082\u30cb\u30c3\u30b1\u30eb\u542b\u6709\u91cf\u304c\u5c11\u306a\u3044\u3002&nbsp;<\/p>\n\n\n\n<p>\u4e21\u8005\u306e\u9055\u3044\u306f\u308f\u305a\u304b\u3067\u3001\u7279\u6027\u306e\u6210\u679c\u3082\u540c\u69d8\u306b\u308f\u305a\u304b\u3067\u3059\u3002\u4e21\u8005\u306e\u9593\u306b\u306f\u660e\u78ba\u306a\u9055\u3044\u306f\u3042\u308a\u307e\u305b\u3093\u304c\u3001\u4fa1\u683c\u304c\u7570\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u30023Cr13\u92fc\u306f420J2\u92fc\u3088\u308a\u3082\u624b\u9803\u306a\u4fa1\u683c\u306b\u306a\u308b\u50be\u5411\u304c\u3042\u308a\u307e\u3059\u3002\u7dcf\u5408\u7684\u306b\u898b\u3066\u3001\u7a76\u6975\u306e\u4f4e\u4fa1\u683c\u30ca\u30a4\u30d5\u3092\u8ca9\u58f2\u3059\u308b\u4e88\u5b9a\u3067\u3042\u308c\u3070\u3001420J2\u92fc\u3088\u308a\u30823Cr13\u92fc\u306e\u65b9\u304c\u9069\u3057\u3066\u3044\u308b\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">420J2\u3068440A\u92fc<\/h3>\n\n\n\n<p><a href=\"https:\/\/leeknives.com\/ja\/440a%e9%8b%bc\/\" target=\"_blank\" rel=\"noreferrer noopener\">440A<\/a> is superior to 420J2 steel in edge retention and wear resistance with comparable corrosion resistance. 420J2 has better corrosion resistance, but it is only in the extremes. Unless your customers plan to dip the knife entirely in crude oil and cut down things with it, the difference won\u2019t be noticeable. However, 420J2 will make longer-lasting diving knives.<\/p>\n\n\n\n<p>Other than these, 440A steel will deliver a similarly priced knife with better performance.&nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">420J2 vs. 5Cr15MoV\u92fc<\/h3>\n\n\n\n<p>5Cr15MoV \u306f\u3001\u540c\u69d8\u306e\u8010\u8150\u98df\u6027\u3068\u976d\u6027\u3092\u5099\u3048\u305f\u3088\u308a\u512a\u308c\u305f\u92fc\u3092\u6c42\u3081\u308b\u4eba\u306b\u3068\u3063\u3066\u3001420J2 \u306e\u6700\u826f\u306e\u4ee3\u66ff\u54c1\u3067\u3059\u3002 <a href=\"https:\/\/leeknives.com\/ja\/5cr15mov\/\">5Cr15MoV\u92fc<\/a> \u5305\u4e01\u611b\u597d\u5bb6\u306e\u9593\u3067\u306f\u5e83\u304f\u8a8d\u77e5\u3055\u308c\u3066\u304a\u308a\u3001\u591a\u304f\u306e\u6709\u540d\u30d6\u30e9\u30f3\u30c9\u304c\u5203\u7269\u306e\u88fd\u9020\u306b\u4f7f\u7528\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<p>5Cr15MoV\u306fX50CrMoV15\u306e\u4e2d\u56fd\u7248\u3067\u3001420J2\u3088\u308a\u3082\u306f\u308b\u304b\u306b\u512a\u308c\u305f\u6027\u80fd\u3092\u767a\u63ee\u3057\u307e\u3059\u3002\u5f37\u5ea6\u3068\u8010\u8150\u98df\u6027\u306f\u540c\u7b49\u3067\u3001\u5203\u6301\u3061\u3068\u8010\u6469\u8017\u6027\u306f\u3055\u3089\u306b\u512a\u308c\u3066\u3044\u307e\u3059\u3002\u305d\u306e\u305f\u3081\u3001420J2\u92fc\u3088\u308a\u3082\u512a\u308c\u305f\u54c1\u8cea\u306e\u88fd\u54c1\u3092\u6c42\u3081\u308b\u5e97\u8217\u306b\u3068\u3063\u3066\u30015Cr15MoV\u306f\u3088\u308a\u826f\u3044\u9078\u629e\u80a2\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">420J2 vs. 420HC<\/h3>\n\n\n\n<p><a href=\"https:\/\/leeknives.com\/ja\/420hc%e3%82%b9%e3%83%81%e3%83%bc%e3%83%ab\/\" target=\"_blank\" rel=\"noreferrer noopener\">420HC<\/a> is a high-carbon upgrade that stays sharp much longer. Thanks to its higher hardness (56-59 HRC),&nbsp;420HC offers superior edge retention&nbsp;for daily cutting. In contrast, 420J2 is much softer and requires frequent sharpening, making it less ideal for heavy-duty tasks.<\/p>\n\n\n\n<p>However,&nbsp;420J2 is the winner for extreme rust resistance.&nbsp;Its composition makes it virtually immune to corrosion, even in saltwater. While 420HC is better for standard EDC and hunting knives, 420J2 is the superior choice for&nbsp;diving knives, surgical scalpels, and liners&nbsp;where rust prevention is the top priority.<\/p>\n\n\n<style>.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id1072_279893-d1{margin-bottom:0px;margin-top:20px;margin-bottom:40px;}.kb-row-layout-id1072_279893-d1 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id1072_279893-d1 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id1072_279893-d1 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-none, 0rem );row-gap:var(--global-kb-gap-md, 2rem);padding-top:25px;padding-right:25px;padding-bottom:25px;padding-left:25px;grid-template-columns:minmax(0, calc(60% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)))minmax(0, calc(40% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)));}.kb-row-layout-id1072_279893-d1{border-top:1px solid var(--base);border-bottom:1px solid var(--base);}.kb-row-layout-id1072_279893-d1 > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id1072_279893-d1 > .kt-row-column-wrap{grid-template-columns:repeat(2, minmax(0, 1fr));}}@media all and (max-width: 1024px){.kb-row-layout-id1072_279893-d1{border-top:1px solid var(--base);border-bottom:1px solid var(--base);}}@media all and (max-width: 767px){.kb-row-layout-id1072_279893-d1 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id1072_279893-d1{border-top:1px solid var(--base);border-bottom:1px solid var(--base);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id1072_279893-d1 alignnone wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column1072_81469c-af > .kt-inside-inner-col{display:flex;}.kadence-column1072_81469c-af > .kt-inside-inner-col{padding-top:0px;}.kadence-column1072_81469c-af > .kt-inside-inner-col,.kadence-column1072_81469c-af > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1072_81469c-af > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1072_81469c-af > .kt-inside-inner-col{flex-direction:column;justify-content:flex-start;}.kadence-column1072_81469c-af > .kt-inside-inner-col > .aligncenter{width:100%;}.kt-row-column-wrap > .kadence-column1072_81469c-af{align-self:flex-start;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_81469c-af{align-self:auto;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_81469c-af > .kt-inside-inner-col{flex-direction:column;justify-content:flex-start;}.kadence-column1072_81469c-af > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1072_81469c-af{position:relative;}.kadence-column1072_81469c-af, .kt-inside-inner-col > .kadence-column1072_81469c-af:not(.specificity){margin-top:0px;}@media all and (max-width: 1024px){.kt-row-column-wrap > .kadence-column1072_81469c-af{align-self:flex-start;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_81469c-af{align-self:auto;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_81469c-af > .kt-inside-inner-col{flex-direction:column;justify-content:flex-start;}}@media all and (max-width: 1024px){.kadence-column1072_81469c-af > .kt-inside-inner-col{flex-direction:column;justify-content:flex-start;}}@media all and (max-width: 767px){.kt-row-column-wrap > .kadence-column1072_81469c-af{align-self:flex-start;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_81469c-af{align-self:auto;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_81469c-af > .kt-inside-inner-col{flex-direction:column;justify-content:flex-start;}.kadence-column1072_81469c-af > .kt-inside-inner-col{flex-direction:column;justify-content:flex-start;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1072_81469c-af inner-column-1\"><div class=\"kt-inside-inner-col\">\n<p class=\"gb-headline gb-headline-19c3a788 gb-headline-text\">\u5378\u58f2\u30ca\u30a4\u30d5\u3092\u8cfc\u5165\u3057\u3066\u3001\u4eca\u3059\u3050\u79c1\u305f\u3061\u3068\u4e00\u7dd2\u306b\u30b9\u30b1\u30fc\u30eb\u30a2\u30c3\u30d7\u3092\u59cb\u3081\u307e\u3057\u3087\u3046<\/p>\n\n\n\n<p class=\"gb-headline gb-headline-6a4f6af2 gb-headline-text\">\u5f0a\u793e\u306b\u304a\u554f\u3044\u5408\u308f\u305b\u3044\u305f\u3060\u304d\u3001\u55b6\u696d\u62c5\u5f53\u8005\u3068\u9023\u7d61\u3092\u53d6\u308a\u3001\u7121\u6599\u306e\u898b\u7a4d\u3082\u308a\u3092\u5165\u624b\u3057\u3066\u304f\u3060\u3055\u3044\u3002&nbsp;<\/p>\n<\/div><\/div>\n\n\n<style>.kadence-column1072_95d379-db > .kt-inside-inner-col{display:flex;}.kadence-column1072_95d379-db > .kt-inside-inner-col,.kadence-column1072_95d379-db > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column1072_95d379-db > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column1072_95d379-db > .kt-inside-inner-col{flex-direction:column;justify-content:center;}.kadence-column1072_95d379-db > .kt-inside-inner-col > .aligncenter{width:100%;}.kt-row-column-wrap > .kadence-column1072_95d379-db{align-self:center;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_95d379-db{align-self:auto;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_95d379-db > .kt-inside-inner-col{flex-direction:column;justify-content:center;}.kadence-column1072_95d379-db > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column1072_95d379-db{position:relative;}@media all and (max-width: 1024px){.kt-row-column-wrap > .kadence-column1072_95d379-db{align-self:center;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_95d379-db{align-self:auto;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_95d379-db > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 1024px){.kadence-column1072_95d379-db > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kt-row-column-wrap > .kadence-column1072_95d379-db{align-self:center;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_95d379-db{align-self:auto;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column1072_95d379-db > .kt-inside-inner-col{flex-direction:column;justify-content:center;}.kadence-column1072_95d379-db > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column1072_95d379-db inner-column-2\"><div class=\"kt-inside-inner-col\"><style>.wp-block-kadence-advancedbtn.kb-btns1072_2314fb-61{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:flex-end;align-items:center;}.kt-btns1072_2314fb-61 .kt-button{font-weight:normal;font-style:normal;}@media all and (max-width: 767px){.wp-block-kadence-advancedbtn.kb-btns1072_2314fb-61{justify-content:flex-start;}}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns1072_2314fb-61\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn1072_41732e-2f.kb-button{width:initial;}.wp-block-kadence-advancedbtn .kb-btn1072_41732e-2f.kb-button{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}<\/style><a class=\"kb-button kt-button button kb-btn1072_41732e-2f kt-btn-size-standard kt-btn-width-type-auto kb-btn-global-inherit  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-button__link wp-block-kadence-singlebtn\" href=\"https:\/\/leeknives.com\/ja\/%e8%a6%8b%e7%a9%8d%e3%82%82%e3%82%8a%e3%82%92%e4%be%9d%e9%a0%bc%e3%81%99%e3%82%8b\/\"><span class=\"kt-btn-inner-text\">\u898b\u7a4d\u3082\u308a\u4f9d\u983c<\/span><\/a><\/div>\n<\/div><\/div>\n\n<\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\">420J2 cost analysis and global supply chain<\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/420J2-Cost-Analysis-and-Global-Supply-Chain.jpg\"><img decoding=\"async\" width=\"1200\" height=\"896\" src=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/420J2-Cost-Analysis-and-Global-Supply-Chain.jpg\" alt=\"420J2 Cost Analysis and Global Supply Chain\" class=\"wp-image-19762\" srcset=\"https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/420J2-Cost-Analysis-and-Global-Supply-Chain.jpg 1200w, https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/420J2-Cost-Analysis-and-Global-Supply-Chain-768x573.jpg 768w, https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/420J2-Cost-Analysis-and-Global-Supply-Chain-16x12.jpg 16w, https:\/\/img.leeknives.com\/wp-content\/uploads\/2023\/02\/420J2-Cost-Analysis-and-Global-Supply-Chain-600x448.jpg 600w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" \/><\/a><\/figure>\n\n\n\n<p>For businesses looking to optimize their product lines, understanding the cost structure and sourcing availability of 420J2 is essential. As a high-volume industrial steel, its pricing is highly competitive compared to premium powder metallurgy steels.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Current market pricing (2024-2026 forecast)<\/h3>\n\n\n\n<p>Based on current industrial data from major steel hubs (primarily China and Japan), 420J2 remains one of the most cost-efficient <a href=\"https:\/\/leeknives.com\/ja\/%e5%8c%85%e4%b8%81%e3%81%ab%e6%9c%80%e9%81%a9%e3%81%aa%e9%8b%bc\/#stainless-steel\">\u30b9\u30c6\u30f3\u30ec\u30b9\u92fc<\/a> available:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Wholesale Raw Material:<\/strong>&nbsp;The average price for 420J2 hot-rolled or cold-rolled coils typically ranges between&nbsp;<strong>US $1,200 and $2,500 per ton<\/strong>, depending on the finish and thickness.<\/li>\n\n\n\n<li><strong>Per-Unit Cost:<\/strong>&nbsp;For manufacturing, the material cost per kilogram is approximately&nbsp;<strong>US $1.50 to $3.00<\/strong>. This low entry price allows for the production of budget-tier knives that can be sold at high volumes with significant profit margins.<\/li>\n\n\n\n<li><strong>Production Efficiency:<\/strong>&nbsp;420J2 is highly &#8220;machinable.&#8221; Its relatively low hardness in an annealed state reduces wear on factory grinding belts and CNC tools, further lowering the &#8220;hidden&#8221; costs of manufacturing.<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><em>Data compiled from Alibaba wholesale indices, Made-in-China supplier quotes, and global steel market forecasts for 2025-2026.<\/em><\/p>\n<\/blockquote>\n\n\n\n<h3 class=\"wp-block-heading\">Global supply chain insights<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Primary Sourcing Hubs:<\/strong>&nbsp;China is currently the world\u2019s leading exporter of 420J2 (often referred to as 3Cr13 in Chinese GB standards). While Japanese-origin 420J2 (JIS standard) is highly regarded for its consistency, Chinese manufacturers offer the most competitive pricing for large-scale wholesale orders.<\/li>\n\n\n\n<li><strong>Availability:<\/strong>&nbsp;Supply is extremely stable. Unlike high-end steels (such as <a href=\"https:\/\/leeknives.com\/ja\/%e3%83%9e%e3%82%b0%e3%83%8a%e3%82%ab%e3%83%83%e3%83%88%e9%8b%bc\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u30de\u30b0\u30ca\u30ab\u30c3\u30c8<\/a> \u307e\u305f\u306f <a href=\"https:\/\/leeknives.com\/ja\/m390%e9%8b%bc\/\" target=\"_blank\" rel=\"noreferrer noopener\">M390<\/a>) which often face allocation shortages, 420J2 is produced in massive quantities globally, ensuring a reliable supply chain for year-round production.<\/li>\n\n\n\n<li><strong>Export Trends:<\/strong>&nbsp;Starting in 2026, new export licensing systems in major producing regions are expected to regulate steel flows more strictly. However, due to its status as a standard industrial grade, 420J2 remains less susceptible to the price volatility seen in nickel-heavy stainless steels like the 300-series.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion: How is 420J2 steel as a knife material?<\/h2>\n\n\n\n<p>\u591a\u304f\u306e\u4eba\u304c\u671f\u5f85\u3057\u3066\u3044\u305f\u307b\u3069\u826f\u304f\u306f\u3042\u308a\u307e\u305b\u3093\u3002420J2\u92fc\u306f\u976d\u6027\u3068\u8010\u8150\u98df\u6027\u3067\u306f\u512a\u308c\u3066\u3044\u308b\u3082\u306e\u306e\u3001\u786c\u5ea6\u3068\u5203\u6301\u3061\u306e\u60aa\u3055\u306f\u3001\u540c\u30af\u30e9\u30b9\u306e\u4f4e\u4fa1\u683c\u92fc\u3068\u6bd4\u3079\u3066\u3082\u905c\u8272\u3042\u308a\u307e\u305b\u3093\u3002 <\/p>\n\n\n\n<p>420J2\u92fc\u3067\u4f5c\u3089\u308c\u305f\u30ad\u30c3\u30c1\u30f3\u30ca\u30a4\u30d5\u306f\u307b\u3068\u3093\u3069\u898b\u304b\u3051\u307e\u305b\u3093\u3002\u4e3b\u306bEDC\u30ca\u30a4\u30d5\u3001\u5916\u79d1\u7528\u5668\u5177\u3001\u305d\u306e\u4ed6\u30e1\u30f3\u30c6\u30ca\u30f3\u30b9\u304c\u307b\u3068\u3093\u3069\u4e0d\u8981\u306a\u5203\u7269\u306b\u4f7f\u7528\u3055\u308c\u307e\u3059\u3002&nbsp;<\/p>\n\n\n\n<p>\u3057\u304b\u3057\u3001\u30a8\u30f3\u30c9\u30e6\u30fc\u30b6\u30fc\u306e\u8981\u6c42\u6b21\u7b2c\u3067\u306f\u300c\u307e\u3042\u307e\u3042\u300d\u306e\u30ca\u30a4\u30d5\u306b\u306a\u308a\u5f97\u307e\u3059\u3002420J2\u92fc\u88fd\u306e\u5305\u4e01\u3092\u8ca9\u58f2\u3057\u3066\u3044\u308b\u30d6\u30e9\u30f3\u30c9\u3001Kamikoto\u306f\u3001\u79c1\u305f\u3061\u304c\u77e5\u308b\u9650\u308a\u3001\u3053\u306e\u92fc\u3092\u5203\u7269\u306b\u4f7f\u7528\u3057\u3066\u3044\u308b\u552f\u4e00\u306e\u4f01\u696d\u3067\u3059\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">420J2\u92fc\u306e\u30ca\u30a4\u30d5\u3092\u8ca9\u58f2\u3059\u3079\u304d\u3067\u3057\u3087\u3046\u304b?<\/h2>\n\n\n\n<p>\u7d50\u8ad6\u3068\u3057\u3066\u3001420J2\u92fc\u306f\u8010\u98df\u6027\u3068\u8010\u4e45\u6027\u304c\u6c42\u3081\u3089\u308c\u308b\u30ca\u30a4\u30d5\u306b\u9069\u3057\u305f\u92fc\u6750\u3067\u3059\u3002\u3057\u304b\u3057\u3001\u5203\u6301\u3061\u3068\u8010\u6469\u8017\u6027\u306e\u4f4e\u3055\u304c\u3001\u3053\u308c\u3089\u306e\u7279\u6027\u3092\u5168\u4f53\u7684\u306b\u4f4e\u4e0b\u3055\u305b\u3066\u3044\u307e\u3059\u3002&nbsp;<\/p>\n\n\n\n<p>\u3053\u306e\u30ca\u30a4\u30d5\u92fc\u306f\u3001\u30ad\u30c3\u30c1\u30f3\u30ab\u30c8\u30e9\u30ea\u30fc\u3088\u308a\u3082EDC\u30ca\u30a4\u30d5\u3084\u30dd\u30b1\u30c3\u30c8\u30ca\u30a4\u30d5\u306b\u9069\u3057\u3066\u3044\u307e\u3059\u3002420J2\u92fc\u88fd\u306e\u30ad\u30c3\u30c1\u30f3\u30ca\u30a4\u30d5\u306f\u3001\u5ff5\u5165\u308a\u306a\u7814\u304e\u3068\u983b\u7e41\u306a\u7814\u304e\u304c\u5fc5\u8981\u3067\u3059\u3002\u30ad\u30c3\u30c1\u30f3\u30ca\u30a4\u30d5\u3092\u4e3b\u306b\u8ca9\u58f2\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001\u3053\u306e\u70b9\u3092\u3054\u691c\u8a0e\u304f\u3060\u3055\u3044\u3002<\/p>\n\n\n\n<p>LeeKnives is a manufacturer of <a href=\"https:\/\/leeknives.com\/ja\/%e5%8c%85%e4%b8%81\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u5305\u4e01<\/a> \u305d\u3057\u3066 <a href=\"https:\/\/leeknives.com\/ja\/%e3%81%be%e3%81%aa%e6%9d%bf\/\" target=\"_blank\" rel=\"noreferrer noopener\">\u307e\u306a\u677f<\/a> with ranging qualities. We have products that appeal to users of all levels and needs. Browse our catalogs and <a href=\"https:\/\/leeknives.com\/ja\/%e8%a6%8b%e7%a9%8d%e3%82%82%e3%82%8a%e3%82%92%e4%be%9d%e9%a0%bc%e3%81%99%e3%82%8b\/\">\u4eca\u3059\u3050\u7121\u6599\u898b\u7a4d\u3082\u308a\u3092\u30ea\u30af\u30a8\u30b9\u30c8<\/a> \u88fd\u54c1\u3092\u5378\u58f2\u308a\u3067\u8abf\u9054\u3059\u308b\u3002<\/p>\n\n\n<style>.kb-row-layout-wrap.wp-block-kadence-rowlayout.kb-row-layout-id17698_95d2d3-97{margin-bottom:0px;margin-top:20px;margin-bottom:40px;}.kb-row-layout-id17698_95d2d3-97 > .kt-row-column-wrap{align-content:start;}:where(.kb-row-layout-id17698_95d2d3-97 > .kt-row-column-wrap) > .wp-block-kadence-column{justify-content:start;}.kb-row-layout-id17698_95d2d3-97 > .kt-row-column-wrap{column-gap:var(--global-kb-gap-none, 0rem );row-gap:var(--global-kb-gap-md, 2rem);padding-top:25px;padding-right:25px;padding-bottom:25px;padding-left:25px;grid-template-columns:minmax(0, calc(60% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)))minmax(0, calc(40% - ((var(--global-kb-gap-none, 0rem ) * 1 )\/2)));}.kb-row-layout-id17698_95d2d3-97{border-top:1px solid var(--base);border-bottom:1px solid var(--base);}.kb-row-layout-id17698_95d2d3-97 > .kt-row-layout-overlay{opacity:0.30;}@media all and (max-width: 1024px){.kb-row-layout-id17698_95d2d3-97 > .kt-row-column-wrap{grid-template-columns:repeat(2, minmax(0, 1fr));}}@media all and (max-width: 1024px){.kb-row-layout-id17698_95d2d3-97{border-top:1px solid var(--base);border-bottom:1px solid var(--base);}}@media all and (max-width: 767px){.kb-row-layout-id17698_95d2d3-97 > .kt-row-column-wrap{grid-template-columns:minmax(0, 1fr);}.kb-row-layout-id17698_95d2d3-97{border-top:1px solid var(--base);border-bottom:1px solid var(--base);}}<\/style><div class=\"kb-row-layout-wrap kb-row-layout-id17698_95d2d3-97 alignnone wp-block-kadence-rowlayout\"><div class=\"kt-row-column-wrap kt-has-2-columns kt-row-layout-equal kt-tab-layout-inherit kt-mobile-layout-row kt-row-valign-top\">\n<style>.kadence-column17698_9f46ef-8f > .kt-inside-inner-col{display:flex;}.kadence-column17698_9f46ef-8f > .kt-inside-inner-col{padding-top:0px;}.kadence-column17698_9f46ef-8f > .kt-inside-inner-col,.kadence-column17698_9f46ef-8f > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column17698_9f46ef-8f > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column17698_9f46ef-8f > .kt-inside-inner-col{flex-direction:column;justify-content:flex-start;}.kadence-column17698_9f46ef-8f > .kt-inside-inner-col > .aligncenter{width:100%;}.kt-row-column-wrap > .kadence-column17698_9f46ef-8f{align-self:flex-start;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column17698_9f46ef-8f{align-self:auto;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column17698_9f46ef-8f > .kt-inside-inner-col{flex-direction:column;justify-content:flex-start;}.kadence-column17698_9f46ef-8f > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column17698_9f46ef-8f{position:relative;}.kadence-column17698_9f46ef-8f, .kt-inside-inner-col > .kadence-column17698_9f46ef-8f:not(.specificity){margin-top:0px;}@media all and (max-width: 1024px){.kt-row-column-wrap > .kadence-column17698_9f46ef-8f{align-self:flex-start;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column17698_9f46ef-8f{align-self:auto;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column17698_9f46ef-8f > .kt-inside-inner-col{flex-direction:column;justify-content:flex-start;}}@media all and (max-width: 1024px){.kadence-column17698_9f46ef-8f > .kt-inside-inner-col{flex-direction:column;justify-content:flex-start;}}@media all and (max-width: 767px){.kt-row-column-wrap > .kadence-column17698_9f46ef-8f{align-self:flex-start;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column17698_9f46ef-8f{align-self:auto;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column17698_9f46ef-8f > .kt-inside-inner-col{flex-direction:column;justify-content:flex-start;}.kadence-column17698_9f46ef-8f > .kt-inside-inner-col{flex-direction:column;justify-content:flex-start;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column17698_9f46ef-8f inner-column-1\"><div class=\"kt-inside-inner-col\">\n<p class=\"gb-headline gb-headline-19c3a788\"><span class=\"gb-icon\"><svg aria-hidden=\"true\" role=\"img\" height=\"1em\" width=\"1em\" viewbox=\"0 0 320 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path fill=\"currentColor\" d=\"M296 160H180.6l42.6-129.8C227.2 15 215.7 0 200 0H56C44 0 33.8 8.9 32.2 20.8l-32 240C-1.7 275.2 9.5 288 24 288h118.7L96.6 482.5c-3.6 15.2 8 29.5 23.3 29.5 8.4 0 16.4-4.4 20.8-12l176-304c9.3-15.9-2.2-36-20.7-36z\"><\/path><\/svg><\/span><span class=\"gb-headline-text\">LeeKnives\u3067\u30ab\u30b9\u30bf\u30e0\u30ca\u30a4\u30d5\u30e9\u30a4\u30f3\u3092\u3088\u308a\u65e9\u304f\u7acb\u3061\u4e0a\u3052\u307e\u3057\u3087\u3046<\/span><\/p>\n\n\n\n<p>\u8a2d\u8a08\u304b\u3089\u6700\u7d42\u51fa\u8377\u307e\u3067\u3001OEM\/ODM \u306e\u5b8c\u5168\u306a\u30b5\u30dd\u30fc\u30c8\u306b\u3088\u308a\u3001\u6210\u9577\u306b\u96c6\u4e2d\u3067\u304d\u307e\u3059\u3002<br>\u7c73\u56fd\u306e\u5009\u5eab\u306b\u4fdd\u7ba1\u3055\u308c\u3066\u3044\u308b\u305f\u3081\u3001\u8fc5\u901f\u3067\u4fe1\u983c\u6027\u306e\u9ad8\u3044\u914d\u9001\u304c\u53ef\u80fd\u3067\u3059\u3002<\/p>\n<\/div><\/div>\n\n\n<style>.kadence-column17698_abf7b0-8a > .kt-inside-inner-col{display:flex;}.kadence-column17698_abf7b0-8a > .kt-inside-inner-col,.kadence-column17698_abf7b0-8a > .kt-inside-inner-col:before{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}.kadence-column17698_abf7b0-8a > .kt-inside-inner-col{column-gap:var(--global-kb-gap-sm, 1rem);}.kadence-column17698_abf7b0-8a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}.kadence-column17698_abf7b0-8a > .kt-inside-inner-col > .aligncenter{width:100%;}.kt-row-column-wrap > .kadence-column17698_abf7b0-8a{align-self:center;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column17698_abf7b0-8a{align-self:auto;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column17698_abf7b0-8a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}.kadence-column17698_abf7b0-8a > .kt-inside-inner-col:before{opacity:0.3;}.kadence-column17698_abf7b0-8a{position:relative;}@media all and (max-width: 1024px){.kt-row-column-wrap > .kadence-column17698_abf7b0-8a{align-self:center;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column17698_abf7b0-8a{align-self:auto;}}@media all and (max-width: 1024px){.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column17698_abf7b0-8a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 1024px){.kadence-column17698_abf7b0-8a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}@media all and (max-width: 767px){.kt-row-column-wrap > .kadence-column17698_abf7b0-8a{align-self:center;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column17698_abf7b0-8a{align-self:auto;}.kt-inner-column-height-full:not(.kt-has-1-columns) > .wp-block-kadence-column.kadence-column17698_abf7b0-8a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}.kadence-column17698_abf7b0-8a > .kt-inside-inner-col{flex-direction:column;justify-content:center;}}<\/style>\n<div class=\"wp-block-kadence-column kadence-column17698_abf7b0-8a inner-column-2\"><div class=\"kt-inside-inner-col\"><style>.wp-block-kadence-advancedbtn.kb-btns17698_0ffc98-bb{gap:var(--global-kb-gap-xs, 0.5rem );justify-content:flex-end;align-items:center;}.kt-btns17698_0ffc98-bb .kt-button{font-weight:normal;font-style:normal;}@media all and (max-width: 767px){.wp-block-kadence-advancedbtn.kb-btns17698_0ffc98-bb{justify-content:flex-start;}}<\/style>\n<div class=\"wp-block-kadence-advancedbtn kb-buttons-wrap kb-btns17698_0ffc98-bb\"><style>ul.menu .wp-block-kadence-advancedbtn .kb-btn17698_a41fe9-79.kb-button{width:initial;}.wp-block-kadence-advancedbtn .kb-btn17698_a41fe9-79.kb-button{border-top-left-radius:0px;border-top-right-radius:0px;border-bottom-right-radius:0px;border-bottom-left-radius:0px;}<\/style><a class=\"kb-button kt-button button kb-btn17698_a41fe9-79 kt-btn-size-standard kt-btn-width-type-auto kb-btn-global-inherit  kt-btn-has-text-true kt-btn-has-svg-false  wp-block-button__link wp-block-kadence-singlebtn\" href=\"https:\/\/leeknives.com\/ja\/%e8%a6%8b%e7%a9%8d%e3%82%82%e3%82%8a%e3%82%92%e4%be%9d%e9%a0%bc%e3%81%99%e3%82%8b\/\"><span class=\"kt-btn-inner-text\">\u898b\u7a4d\u3082\u308a\u4f9d\u983c<\/span><\/a><\/div>\n<\/div><\/div>\n\n<\/div><\/div>\n\n\n<h2 class=\"wp-block-heading\">\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">What is the difference between 420J1 and 420J2 stainless steel?<\/h3>\n\n\n\n<p>The main difference is&nbsp;<strong>\u70ad\u7d20\u542b\u6709\u91cf<\/strong>. 420J1 contains less carbon (approx. 0.15%) than 420J2 (up to 0.36%). This makes 420J1 softer and more corrosion-resistant, but it cannot be hardened enough for quality knife blades. 420J2 is the industry standard for blades because it offers a better balance of hardness and edge retention.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What is the difference between 420J2 and VG-10?<\/h3>\n\n\n\n<p>These two steels are at opposite ends of the performance spectrum.&nbsp;<strong>VG-10 is a premium &#8220;super steel&#8221;<\/strong>&nbsp;with high carbon and vanadium, designed for extreme sharpness and edge retention in professional kitchen knives.&nbsp;<strong>420J2 is a budget steel<\/strong>&nbsp;prioritized for rust resistance and toughness. In high-end knives, they are often used together: 420J2 as the protective outer cladding and VG-10 as the hard cutting core.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Is 420J2 actually Japanese steel?<\/h3>\n\n\n\n<p>Originally, yes. The &#8220;J2&#8221; refers to the&nbsp;<strong>Japanese Industrial Standard (JIS) SUS420J2<\/strong>. While this steel is now manufactured globally (notably in China as 3Cr13), the technical specifications and naming convention originated from the Japanese metallurgical standards.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Will a magnet stick to 420J2 stainless steel?<\/h3>\n\n\n\n<p><strong>Yes.<\/strong>&nbsp;420J2 is a martensitic stainless steel, which means it has a crystalline structure that is&nbsp;<strong>naturally magnetic<\/strong>. This is different from austenitic stainless steels (like 304 or 316 used in kitchen sinks), which are generally non-magnetic.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">How does 420J2 compare to 8Cr13MoV?&nbsp;<\/h3>\n\n\n\n<p><strong>8Cr13MoV offers better cutting performance.<\/strong>&nbsp;It contains more carbon and added molybdenum, allowing it to hold a sharp edge significantly longer than 420J2. However, 420J2 is more rust-resistant and tougher (less likely to chip), making it better for diving or saltwater environments where 8Cr13MoV might struggle with corrosion.<\/p>","protected":false},"excerpt":{"rendered":"<p>420J2\u306f\u3001\u4f4e\u70ad\u7d20\u30fb\u9ad8\u30af\u30ed\u30e0\u30b9\u30c6\u30f3\u30ec\u30b9\u92fc\u3067\u3001\u6bd4\u8f03\u7684\u4f4e\u786c\u5ea6\u3067\u3059\u3002\u3053\u306e\u3084\u3084\u8edf\u8cea\u306a\u92fc\u306e\u4e3b\u306a\u7528\u9014\u306f\u3001\u4f4e\u4fa1\u683c\u306e\u30ca\u30a4\u30d5\u3001\u5916\u79d1\u7528\u5668\u5177\u3001\u30d8\u30a2\u30ab\u30c3\u30c8\u7528\u30cf\u30b5\u30df\u306a\u3069\u306e\u6c4e\u7528\u5668\u5177\u3067\u3059\u3002420J2\u92fc\u88fd\u306e\u30ca\u30a4\u30d5\u306f\u3001\u8010\u98df\u6027\u3092\u6c42\u3081\u308b\u30e6\u30fc\u30b6\u30fc\u306b\u3068\u3063\u3066\u9b45\u529b\u7684\u3067\u3059\u3002 <a title=\"420J2\u92fc\uff1a\u7279\u6027\u3001\u7528\u9014\u3001\u5229\u70b9\" class=\"read-more\" href=\"https:\/\/leeknives.com\/ja\/420j2-steel\/\" aria-label=\"420J2 \u92fc: \u7279\u6027\u3001\u7528\u9014\u3001\u5229\u70b9\u306b\u3064\u3044\u3066\u3055\u3089\u306b\u8aad\u3080\">\u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>","protected":false},"author":4,"featured_media":8743,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[8],"tags":[],"class_list":["post-8733","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-knife-steel","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-33"],"_links":{"self":[{"href":"https:\/\/leeknives.com\/ja\/wp-json\/wp\/v2\/posts\/8733","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/leeknives.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/leeknives.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/leeknives.com\/ja\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/leeknives.com\/ja\/wp-json\/wp\/v2\/comments?post=8733"}],"version-history":[{"count":0,"href":"https:\/\/leeknives.com\/ja\/wp-json\/wp\/v2\/posts\/8733\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/leeknives.com\/ja\/wp-json\/wp\/v2\/media\/8743"}],"wp:attachment":[{"href":"https:\/\/leeknives.com\/ja\/wp-json\/wp\/v2\/media?parent=8733"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/leeknives.com\/ja\/wp-json\/wp\/v2\/categories?post=8733"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/leeknives.com\/ja\/wp-json\/wp\/v2\/tags?post=8733"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}