{"id":24823,"date":"2026-10-31T09:54:46","date_gmt":"2026-10-31T01:54:46","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=24823"},"modified":"2026-10-31T09:54:46","modified_gmt":"2026-10-31T01:54:46","slug":"1-2379-tool-steel","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/es\/1-2379-tool-steel\/","title":{"rendered":"1.2379 Tool Steel (X153CrMoV12 | D2) Cold Work Supplier | Aobo Steel"},"content":{"rendered":"\n<div class=\"wp-block-cover alignfull is-light e2379-cover\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-block-cover__image-background wp-image-23301\" alt=\"1.2379 \/ D2 tool steel round bar \u2014 bar ends marked with grade, diameter \u00d8130 \/ \u00d8190 and heat number\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/up-rb79-hero.jpg\" width=\"1920\" height=\"1440\" data-object-fit=\"cover\" srcset=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/up-rb79-hero-300x225.jpg 300w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/up-rb79-hero-768x576.jpg 768w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/up-rb79-hero-1024x768.jpg 1024w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/up-rb79-hero-1536x1152.jpg 1536w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/up-rb79-hero.jpg 1920w\" sizes=\"auto, (max-width: 768px) 100vw, 1920px\"\/><span aria-hidden=\"true\" class=\"wp-block-cover__background has-background-dim-0 has-background-dim\"><\/span><div class=\"wp-block-cover__inner-container is-layout-constrained wp-block-cover-is-layout-constrained\">\n<style id=\"aobo-2379\" data-noptimize=\"1\">\n\/* ===== 1.2379 tool steel product page \u2014 header + hero fill the first viewport; theme footer follows ===== *\/\n\/* every rule is scoped to .e2379; the theme footer is kept on this page (page-id-24823) *\/\n.e2379 *,.e2379 *::before,.e2379 *::after{box-sizing:border-box}\n.e2379{font-size:16px;line-height:1.7;color:#fff}\n\n\/* --- one-screen hero; the theme footer stays below it (Evan 2026-10-20) --- *\/\nbody.page-id-24823 .site-content{padding-bottom:0!important;margin-bottom:0!important}\nbody.page-id-24823 .site-footer,body.page-id-24823 #colophon{display:block!important}\n\n\/* --- hero: full-bleed, fills everything below the theme header (148px desktop \/ 74px mobile) --- *\/\n.e2379-cover{position:relative;isolation:isolate;overflow:hidden;display:flex;align-items:center;padding:0!important;\n  min-height:calc(100svh - 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74px)}\n}\n\/* logged-in visitors carry the 32px WP admin bar \u2014 keep header + hero inside one screen *\/\nbody.admin-bar .e2379-cover{min-height:calc(100svh - 180px)}\n@media (max-width:900px){\n  .e2379-in{padding:12px 13px 7px;gap:9px}\n  .e2379-eyebrow{font-size:10.2px;margin-bottom:4px}\n  .e2379-h1{font-size:23px!important;margin-bottom:4px!important}\n  .e2379-sub{font-size:15px;margin-bottom:6px}\n  .e2379-lede{font-size:13px;margin-bottom:7px;line-height:1.38}\n  .e2379-spec div{grid-template-columns:92px 1fr;font-size:11.8px;padding:4px 9px;gap:8px}\n  .e2379-also{display:none}\n  .e2379-card{padding:10px 12px 9px}\n  .e2379-card h2{font-size:15px!important}\n  .e2379-cardsub{margin-bottom:7px;font-size:11.6px}\n  .e2379-card input[type=text],.e2379-card input[type=email],.e2379-card input[type=tel],.e2379-card textarea{padding:7px 9px;font-size:12.8px}\n  .e2379-card form p{margin-bottom:5px}\n  .e2379-card textarea{min-height:38px}\n  .e2379-card input[type=submit]{padding:10px 12px;font-size:14px}\n}\n\/* small phones: one tier tighter so specs + form still fit one screen *\/\n@media (max-width:420px){\n  .e2379-spec .row-docs,.e2379-spec .row-delivery{display:none}\n  .e2379-spec div{font-size:11.3px;padding:3px 8px}\n  .e2379-h1{font-size:22px!important}\n  .e2379-lede{display:none}\n  .e2379-card{padding:9px 11px 8px}\n  .e2379-card form p{margin-bottom:4px}\n  .e2379-card input[type=text],.e2379-card input[type=email],.e2379-card input[type=tel],.e2379-card textarea{padding:6px 8px;font-size:12.4px}\n  .e2379-card textarea{min-height:30px}\n  .e2379-card input[type=submit]{padding:9px 12px;font-size:13.6px}\n  .e2379-or{margin-top:6px;font-size:11.4px}\n}\n\/* very small phones (360px class): last tier so the page still does not scroll *\/\n@media (max-width:380px){\n  .e2379-eyebrow{display:none}\n  .e2379-in{gap:6px;padding:6px 10px 4px}\n  .e2379-h1{font-size:21px!important}\n  .e2379-sub{font-size:13px;margin-bottom:4px}\n  .e2379-spec div{font-size:11.1px;padding:2px 7px;gap:7px}\n  .e2379-card{padding:7px 9px 6px}\n  .e2379-cardsub{margin-bottom:5px}\n  .e2379-card form p{margin-bottom:3px}\n  .e2379-card input[type=text],.e2379-card input[type=email],.e2379-card input[type=tel],.e2379-card textarea{padding:5px 8px;font-size:12.2px}\n  .e2379-card textarea{min-height:22px}\n  .e2379-card input[type=submit]{padding:8px 11px;font-size:13.4px}\n  .e2379-or{margin-top:5px;font-size:11.2px}\n}\n<\/style>\n<div class=\"e2379-in\">\n    <div class=\"e2379-copy\">\n      <p class=\"e2379-eyebrow\">Aobo Steel \u00b7 Tool Steel Supplier \u00b7 Huangshi, China<\/p>\n      <h1 class=\"e2379-h1\">1.2379 Tool Steel (X153CrMoV12 \/ AISI D2)<\/h1>\n      <p class=\"e2379-sub\">EN 10027-2 material number \u00b7 X153CrMoV12 \u00b7 AISI D2 \u00b7 JIS SKD11<\/p>\n      <p class=\"e2379-lede\">1.2379 is the EN 10027-2 number for the high carbon, high chromium cold work steel sold internationally as AISI D2 and JIS SKD11. European drawings usually call it up by that number, and the mill certificate comes back under whichever designation the mill prints. This page sets out what the number means, which other designations the same bar carries, and what can be ordered against it.<\/p>\n      <div class=\"e2379-spec\"><div class=\"hl\"><b>EN number<\/b><span>1.2379 \u00b7 EN 10027-2 steel group 23 \u00b7 EN 10027-1 name X153CrMoV12<\/span><\/div><div><b>Grade<\/b><span>AISI D2 \u00b7 JIS SKD11 \u00b7 GB Cr12Mo1V1<\/span><\/div><div class=\"hl\"><b>Forms<\/b><span>Round bar \u00b7 flat bar \u00b7 plate \u00b7 forged block<\/span><\/div><div class=\"row-surface\"><b>Surface<\/b><span>Black \/ turned \/ peeled \/ polished on request<\/span><\/div><div class=\"row-delivery\"><b>Delivery<\/b><span>Spheroidise annealed \u2264 255 HBW \u00b7 ESR on request<\/span><\/div><div class=\"row-docs\"><b>Documents<\/b><span>MTC EN 10204 3.1 per heat \u00b7 UT SEP 1921-82 D\/d or E\/e<\/span><\/div><div><b>Order size<\/b><span>MOQ 5 t \u00b7 mixed sizes in one container (~26 t per 20GP)<\/span><\/div><\/div>\n      <p class=\"e2379-also\">Also supplied: <a href=\"https:\/\/aobosteel.com\/1-2379-tool-steel-round-bar\/\">1.2379 round bar<\/a> and <a href=\"https:\/\/aobosteel.com\/d2-tool-steel-plate\/\">D2 tool steel plate<\/a>, plus <a href=\"https:\/\/aobosteel.com\/d2-tool-steel\/\">AISI D2 tool steel<\/a> for buyers who order by the American designation.<\/p>\n    <\/div>\n\n    <div class=\"e2379-card\" id=\"e2379-form\">\n      <h2>Request price &amp; delivery<\/h2>\n      <p class=\"e2379-cardsub\">Send the sizes, quantity and destination port. We confirm price and delivery within one working day.<\/p>\n      \n<div class=\"wpcf7 no-js\" id=\"wpcf7-f16042-o1\" lang=\"en-US\" dir=\"ltr\" data-wpcf7-id=\"16042\">\n<div class=\"screen-reader-response\"><p role=\"status\" aria-live=\"polite\" aria-atomic=\"true\"><\/p> <ul><\/ul><\/div>\n<form action=\"\/es\/wp-json\/wp\/v2\/pages\/24823#wpcf7-f16042-o1\" method=\"post\" class=\"wpcf7-form init\" aria-label=\"Contact form\" novalidate=\"novalidate\" data-status=\"init\">\n<fieldset class=\"hidden-fields-container\"><input type=\"hidden\" name=\"_wpcf7\" value=\"16042\" \/><input type=\"hidden\" name=\"_wpcf7_version\" value=\"6.2.4.1\" \/><input type=\"hidden\" name=\"_wpcf7_locale\" value=\"en_US\" \/><input type=\"hidden\" name=\"_wpcf7_unit_tag\" value=\"wpcf7-f16042-o1\" \/><input type=\"hidden\" name=\"_wpcf7_container_post\" value=\"0\" \/><input type=\"hidden\" name=\"_wpcf7_posted_data_hash\" value=\"\" \/>\n<\/fieldset>\n<div class=\"wpcf7-turnstile cf-turnstile\" data-sitekey=\"0x4AAAAAAFMY32JbOfIdWijB\" data-response-field-name=\"_wpcf7_turnstile_response\"><\/div>\n\n<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-name\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-text wpcf7-validates-as-required\" autocomplete=\"name\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Your Name *\" value=\"\" type=\"text\" name=\"your-name\" \/><\/span>\n<\/p>\n<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-email\"><input size=\"40\" maxlength=\"400\" class=\"wpcf7-form-control wpcf7-email wpcf7-validates-as-required wpcf7-text wpcf7-validates-as-email\" autocomplete=\"email\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Email *\" value=\"\" type=\"email\" name=\"your-email\" \/><\/span>\n<\/p>\n<p><span class=\"wpcf7-form-control-wrap\" data-name=\"your-message\"><textarea cols=\"40\" rows=\"4\" maxlength=\"2000\" class=\"wpcf7-form-control wpcf7-textarea wpcf7-validates-as-required\" aria-required=\"true\" aria-invalid=\"false\" placeholder=\"Message *\" name=\"your-message\"><\/textarea><\/span>\n<\/p>\n<p><input class=\"wpcf7-form-control wpcf7-submit has-spinner\" type=\"submit\" value=\"Send Inquiry\" \/>\n<\/p><p style=\"display: none !important;\" class=\"akismet-fields-container\" data-prefix=\"_wpcf7_ak_\"><label>&#916;<textarea name=\"_wpcf7_ak_hp_textarea\" cols=\"45\" rows=\"8\" maxlength=\"100\"><\/textarea><\/label><input type=\"hidden\" id=\"ak_js_1\" name=\"_wpcf7_ak_js\" value=\"88\"\/><script>\ndocument.getElementById( \"ak_js_1\" ).setAttribute( \"value\", ( new Date() ).getTime() );\n<\/script>\n<\/p><input type='hidden' class='wpcf7-pum' value='{\"closepopup\":false,\"closedelay\":0,\"openpopup\":true,\"openpopup_id\":16052}' \/><div class=\"wpcf7-response-output\" aria-hidden=\"true\"><\/div>\n<\/form>\n<\/div>\n\n      <p class=\"e2379-or\">or <a href=\"https:\/\/wa.me\/8618062945370\">WhatsApp +86 180 6294 5370<\/a> \u00b7 <a href=\"mailto:sales@aobosteel.com\">sales@aobosteel.com<\/a><\/p>\n    <\/div>\n  <\/div>\n<\/div><\/div>\n\n\n\n<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n\n<h2 class=\"wp-block-heading\">How the EN Material Number 1.2379 Is Built<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">EN 10027-2 gives every steel a number instead of a description, in the form 1.XXXX, where the leading 1 refers to steel and the next two digits give the steel group. Under EN 10027-1 the same steel is named X153CrMoV12, and ISO 4957 prints the name and the number in the same row, which is where 1.2379 and X153CrMoV12 are read against each other.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Source, Handbook of Comparative World Steel Standards, Third Edition, ASTM International, 2004, and ISO 4957:2018 Tool Steels.<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The Designations One 1.2379 Bar Carries<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Each standard prints its own row for the same steel, and the differences between those rows decide which one a purchase order quotes.<\/p>\n\n\n\n<div class=\"wp-block-group is-content-justification-left is-layout-constrained wp-container-core-group-is-layout-8e727e61 wp-block-group-is-layout-constrained\">\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Standard<\/th><th>Designation<\/th><th>Composition the standard prints<\/th><\/tr><\/thead><tbody><tr><td>ISO 4957:2018<\/td><td><strong>X153CrMoV12<\/strong> \u00b7 steel number <strong>1.2379<\/strong><\/td><td>C 1.45 to 1.60 \u00b7 Cr 11.0 to 13.0 \u00b7 Mo 0.70 to 1.00 \u00b7 V 0.70 to 1.00<\/td><\/tr><tr><td>ASTM A681<\/td><td>D2 \u00b7 UNS T30402<\/td><td>C 1.40 to 1.60 \u00b7 Cr 11.00 to 13.00 \u00b7 Mo 0.70 to 1.20 \u00b7 V 0.50 to 1.10<\/td><\/tr><tr><td>JIS G4404<\/td><td>SKD11<\/td><td>Compared in the same row as D2<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">The vanadium range is where the ISO row and the ASTM row part company, 0.70 to 1.00 against 0.50 to 1.10, and the ISO table leaves its Japanese column blank for this grade. The alloy is the same steel, and a certificate written to one standard is not a certificate for the other. The Chinese grade is Cr12MoV1V1, set out with the other three on the <a href=\"https:\/\/aobosteel.com\/d2-steel-composition\/\">D2 chemical composition page<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Composition data is for general reference only. Actual values vary by standard, mill, and heat number. Confirm against the material test certificate (MTC) or contact Aobo Steel.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Annealed Condition and Heat Treatment<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">ISO 4957 sets the delivery condition as +A, annealed, with a maximum hardness of 255 HBW, and machining ratings put this grade at about 45 against a 1 percent carbon steel rated at 100. Austenitising at 1020 \u00b0C and quenching in air gives 61 HRC, while the heat treating literature carries 1010 \u00b0C for 63 to 64 HRC as quenched, so the two sources disagree on what a full harden produces. Tempering decides what the tool ends up with. At 200 \u00b0C hardness stays near 61 HRC, at 300 \u00b0C it falls to 58 HRC, and at 500 \u00b0C a double temper brings it back to 59 HRC through secondary hardening. Retained austenite transforms in the 496 to 510 \u00b0C band, which is why the schedule calls for a double temper.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Air quenching moves the part by roughly 0.0005 in.\/in., so a die that has to stay concentric needs that allowance in the drawing. Achievable hardness also falls once the round section passes 5 in. (127 mm), so a heavy block does not harden through like a 50 mm bar. Aobo Steel ships the annealed condition and does not run hardening, tempering or cryogenic treatment. The <a href=\"https:\/\/aobosteel.com\/d2-tool-steel-heat-treatment-guide\/\">D2 heat treatment guide<\/a> carries the full sequence and the <a href=\"https:\/\/aobosteel.com\/d2-steel-hardness\/\">D2 hardness page<\/a> maps tempering temperature against hardness.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Working Hardness by Tool<\/h2>\n\n\n\n<div class=\"wp-block-group is-content-justification-left is-layout-constrained wp-container-core-group-is-layout-8e727e61 wp-block-group-is-layout-constrained\">\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th>Tool<\/th><th class=\"has-text-align-center\">Working hardness<\/th><th>What ends its life<\/th><\/tr><\/thead><tbody><tr><td>Blanking dies<\/td><td class=\"has-text-align-center\">58 to 60 HRC<\/td><td>Cracking from sharp corners at the edge of the punch opening<\/td><\/tr><tr><td>Piercing punches<\/td><td class=\"has-text-align-center\">56 to 60 HRC<\/td><td>Cracking under repeated impact, with low toughness behind it<\/td><\/tr><tr><td>Cold forming tools<\/td><td class=\"has-text-align-center\">58 to 60 HRC<\/td><td>Wear at the working face first, then cracking<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Shear blades and slitter knives fail by spalling and grinding cracks rather than steady wear, which makes grinding practice as important as the grade. The <a href=\"https:\/\/aobosteel.com\/tool-steel-for-stamping-blanking-piercing-dies\/\">stamping, blanking and piercing die page<\/a> and the <a href=\"https:\/\/aobosteel.com\/tool-steel-for-shear-blades-slitter-knives-industrial-knives\/\">shear blade page<\/a> place it against the alternatives, and the <a href=\"https:\/\/aobosteel.com\/cold-work-tool-steels\/\">cold work tool steel hub<\/a> shows the rest of the family.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Where 1.2379 Is the Wrong Buy<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Stamping stainless steel of 18 to 24 percent chromium is the case this grade handles badly, because the work galls against the die face, and the references move to M2 high speed steel or a low chrome grade. Heavy impact and shock move the other way, to the shock resisting S series such as S7 and S1, or to H11 where hot hardness matters. The <a href=\"https:\/\/aobosteel.com\/dc53-vs-d2-tool-steel\/\">DC53 versus D2 comparison<\/a> covers the middle case, a tougher cold work grade that buys longer life for a little less wear resistance.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Surface Treatment and Repair<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Nitriding at 540 \u00b0C for 12 hours raises wear resistance and costs surface toughness, so a nitrided edge can spall or chip. PVD coating pays where sliding wear dominates, and a surface ground after EDM, so the recast white layer is gone, fails far less often. Weld repair needs the crack removed completely and preheat and postheat, or a full re-anneal. The <a href=\"https:\/\/aobosteel.com\/d2-tool-steel-machining-guide\/\">D2 machining guide<\/a> covers the cutting speeds that keep the job economical.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Ordering 1.2379<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The order line carries the EN number, the standard the mill works to and the delivery condition. European distributors sell the same steel under their own codes, Saarstahl GS2379, Thyssen GS-379, Hitachi SLD, Assab XW-42 and D\u00f6rrenberg RS2379, with the delivery hardness each mill states on the <a href=\"https:\/\/aobosteel.com\/imported-mold-steel-brand-cross-reference\/\">imported brand cross reference<\/a>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Round bar runs \u00d820 to 600 mm, forged and turned, and plate from 20 to 400 mm thick by 200 to 610 mm wide. Remelted stock is covered on the <a href=\"https:\/\/aobosteel.com\/1-2379-esr-d2-mill-rolls\/\">1.2379 ESR mill rolls page<\/a>, and the <a href=\"https:\/\/aobosteel.com\/tool-steel-quality-verification\/\">quality verification page<\/a> lists what we check on the certificate before a batch leaves.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Source, ISO 4957:2018 Tool Steels, Handbook of Comparative World Steel Standards (ASTM International), Tool Steels (Roberts and Krauss), Tool Steels Properties and Performance (Mesquita), Heat Treatment Selection and Application of Tool Steels (Bryson), Heat Treater&#8217;s Guide, and Tool and Die Making Troubleshooter (Leed).<\/em><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"faq\">FAQ<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-10000000000\"><strong class=\"schema-faq-question\"><strong>Is 1.2379 the same steel as D2?<\/strong><\/strong> <p class=\"schema-faq-answer\">ISO 4957 prints the grade as X153CrMoV12 with steel number 1.2379, ASTM A681 prints it as D2, and the Japanese standard prints it as SKD11. The alloy is the same steel, the composition ranges printed by each standard are close rather than identical, and the vanadium range is where they differ most.<\/p> <\/div><div class=\"schema-faq-section\" id=\"faq-question-10100000000\"><strong class=\"schema-faq-question\"><strong>What condition does 1.2379 arrive in?<\/strong><\/strong> <p class=\"schema-faq-answer\">Annealed, designated +A in ISO 4957, with a maximum hardness of 255 HBW. Machinability is rated around 45 against a 1 percent carbon steel at 100, which is why cutting data and rough machining allowances matter more on this grade than on a lower alloy tool steel.<\/p> <\/div><div class=\"schema-faq-section\" id=\"faq-question-10200000000\"><strong class=\"schema-faq-question\"><strong>What hardness should the finished tool run at?<\/strong><\/strong> <p class=\"schema-faq-answer\">Blanking dies and cold forming tools normally run at 58 to 60 HRC and piercing punches at 56 to 60 HRC. Going harder than the top of those ranges buys wear resistance and costs edge toughness, and cracking at a sharp corner is the failure that follows.<\/p> <\/div><div class=\"schema-faq-section\" id=\"faq-question-10300000000\"><strong class=\"schema-faq-question\"><strong>Can 1.2379 be nitrided?<\/strong><\/strong> <p class=\"schema-faq-answer\">Yes, at 540 \u00b0C for about 12 hours. The case raises wear resistance at the surface and lowers toughness behind it, so a nitrided edge can spall or chip, and the treatment suits forming faces better than sharp cutting edges.<\/p> <\/div><\/div>\n\n<\/div>\n\n","protected":false},"excerpt":{"rendered":"<p>How the EN Material Number 1.2379 Is Built EN 10027-2 gives every steel a number instead of a description, in the form 1.XXXX, where the leading 1 refers to steel and the next two digits give the steel group. Under EN 10027-1 the same steel is named X153CrMoV12, and ISO 4957 prints the name and [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"full-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"disabled","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"class_list":["post-24823","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.8 (Yoast SEO v28.8) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>1.2379 Tool Steel (X153CrMoV12) Supplier | Aobo Steel<\/title>\n<meta name=\"description\" content=\"DIN 1.2379 cold work tool steel, X153CrMoV12, AISI D2 and SKD11. 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The alloy is the same steel, the composition ranges printed by each standard are close rather than identical, and the vanadium range is where they differ most.","inLanguage":"es"},"inLanguage":"es"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/1-2379-tool-steel\/#faq-question-10100000000","position":2,"url":"https:\/\/aobosteel.com\/1-2379-tool-steel\/#faq-question-10100000000","name":"\u00bfEn qu\u00e9 condici\u00f3n llega el 1.2379?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Annealed, designated +A in ISO 4957, with a maximum hardness of 255 HBW. Machinability is rated around 45 against a 1 percent carbon steel at 100, which is why cutting data and rough machining allowances matter more on this grade than on a lower alloy tool steel.","inLanguage":"es"},"inLanguage":"es"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/1-2379-tool-steel\/#faq-question-10200000000","position":3,"url":"https:\/\/aobosteel.com\/1-2379-tool-steel\/#faq-question-10200000000","name":"\u00bfA qu\u00e9 dureza debe trabajar la herramienta terminada?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Blanking dies and cold forming tools normally run at 58 to 60 HRC and piercing punches at 56 to 60 HRC. Going harder than the top of those ranges buys wear resistance and costs edge toughness, and cracking at a sharp corner is the failure that follows.","inLanguage":"es"},"inLanguage":"es"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/1-2379-tool-steel\/#faq-question-10300000000","position":4,"url":"https:\/\/aobosteel.com\/1-2379-tool-steel\/#faq-question-10300000000","name":"\u00bfSe puede nitrurar el 1.2379?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes, at 540 \u00b0C for about 12 hours. The case raises wear resistance at the surface and lowers toughness behind it, so a nitrided edge can spall or chip, and the treatment suits forming faces better than sharp cutting edges.","inLanguage":"es"},"inLanguage":"es"}]}},"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"trp-custom-language-flag":false},"uagb_author_info":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/es\/blog\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"How the EN Material Number 1.2379 Is Built EN 10027-2 gives every steel a number instead of a description, in the form 1.XXXX, where the leading 1 refers to steel and the next two digits give the steel group. Under EN 10027-1 the same steel is named X153CrMoV12, and ISO 4957 prints the name and&hellip;","rttpg_featured_image_url":null,"rttpg_author":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/es\/blog\/author\/admin\/"},"rttpg_comment":0,"rttpg_category":null,"rttpg_excerpt":"How the EN Material Number 1.2379 Is Built EN 10027-2 gives every steel a number instead of a description, in the form 1.XXXX, where the leading 1 refers to steel and the next two digits give the steel group. Under EN 10027-1 the same steel is named X153CrMoV12, and ISO 4957 prints the name and&hellip;","_links":{"self":[{"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/pages\/24823","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/comments?post=24823"}],"version-history":[{"count":7,"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/pages\/24823\/revisions"}],"predecessor-version":[{"id":24832,"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/pages\/24823\/revisions\/24832"}],"wp:attachment":[{"href":"https:\/\/aobosteel.com\/es\/wp-json\/wp\/v2\/media?parent=24823"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}