{"id":24726,"date":"2026-10-29T10:19:24","date_gmt":"2026-10-29T02:19:24","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=24726"},"modified":"2026-10-31T07:08:54","modified_gmt":"2026-10-30T23:08:54","slug":"1-2379-esr-d2-mill-rolls","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/es\/1-2379-esr-d2-mill-rolls\/","title":{"rendered":"Cilindros de laminaci\u00f3n 1.2379 ESR"},"content":{"rendered":"\n<div class=\"wp-block-cover alignfull is-light d2r-cover\"><img loading=\"lazy\" decoding=\"async\" width=\"2400\" height=\"1182\" class=\"wp-block-cover__image-background wp-image-24738\" alt=\"1.2379 ESR cold rolling mill work rolls, machined barrels with journals, wire-bundled at the roll shop\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/esr-12379-hero-desktop.jpg\" data-object-fit=\"cover\" srcset=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/esr-12379-hero-desktop.jpg 2400w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/esr-12379-hero-desktop-300x148.jpg 300w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/esr-12379-hero-desktop-1024x504.jpg 1024w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/esr-12379-hero-desktop-768x378.jpg 768w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/esr-12379-hero-desktop-1536x756.jpg 1536w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/esr-12379-hero-desktop-2048x1009.jpg 2048w, https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/10\/esr-12379-hero-desktop-18x9.jpg 18w\" sizes=\"auto, (max-width: 2400px) 100vw, 2400px\" \/><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-d2r\" data-noptimize=\"1\">\n\/* ===== 1.2379 ESR mill rolls, one screen: header + hero fill the viewport ===== *\/\n.d2r *,.d2r *::before,.d2r *::after{box-sizing:border-box}\n.d2r{font-size:16px;line-height:1.7;color:#fff}\n\nbody.page-id-24726 .site-content{padding-bottom:0!important;margin-bottom:0!important}\nbody.page-id-24726 .site-footer,body.page-id-24726 #colophon{display:block!important}\n\n.d2r-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}\nbody.admin-bar .d2r-cover{min-height:calc(100svh - 180px)}\n@media (max-width:900px){\n  .d2r-in{padding:12px 13px 8px;gap:8px}\n  .d2r-eyebrow{font-size:10.2px;margin-bottom:4px}\n  .d2r-h1{font-size:23px!important;margin-bottom:4px!important}\n  .d2r-sub{font-size:14.4px;margin-bottom:6px}\n  .d2r-lede{font-size:13px;margin-bottom:7px;line-height:1.38}\n  .d2r-spec div{grid-template-columns:92px 1fr;font-size:11.8px;padding:4px 9px;gap:8px}\n  .d2r-also{display:none}\n  .d2r-card{padding:10px 12px 9px}\n  .d2r-card h2{font-size:15px!important}\n  .d2r-cardsub{margin-bottom:7px;font-size:11.6px}\n  .d2r-card input[type=text],.d2r-card input[type=email],.d2r-card input[type=tel],.d2r-card textarea{padding:7px 9px;font-size:12.8px}\n  .d2r-card form p{margin-bottom:5px}\n  .d2r-card textarea{min-height:36px}\n  .d2r-card input[type=submit]{padding:10px 12px;font-size:14px}\n}\n@media (max-width:420px){\n  .d2r-spec .row-docs,.d2r-spec .row-order{display:none}\n  .d2r-spec div{font-size:11.3px;padding:3px 8px}\n  .d2r-h1{font-size:22px!important}\n  .d2r-lede{display:none}\n  .d2r-card{padding:9px 11px 8px}\n  .d2r-card form p{margin-bottom:4px}\n  .d2r-card input[type=text],.d2r-card input[type=email],.d2r-card input[type=tel],.d2r-card textarea{padding:6px 8px;font-size:12.4px}\n  .d2r-card textarea{min-height:30px}\n  .d2r-card input[type=submit]{padding:9px 12px;font-size:13.6px}\n  .d2r-or{margin-top:6px;font-size:11.4px}\n}\n@media (max-width:380px){\n  .d2r-eyebrow{display:none}\n  .d2r-in{gap:6px;padding:6px 10px 4px}\n  .d2r-h1{font-size:21px!important}\n  .d2r-sub{font-size:12.6px;margin-bottom:4px}\n  .d2r-spec div{font-size:11.1px;padding:2px 7px;gap:7px}\n  .d2r-card{padding:7px 9px 6px}\n  .d2r-cardsub{margin-bottom:5px}\n  .d2r-card form p{margin-bottom:3px}\n  .d2r-card input[type=text],.d2r-card input[type=email],.d2r-card input[type=tel],.d2r-card textarea{padding:5px 8px;font-size:12.2px}\n  .d2r-card textarea{min-height:22px}\n  .d2r-card input[type=submit]{padding:8px 11px;font-size:13.4px}\n  .d2r-or{margin-top:5px;font-size:11.2px}\n}\n<\/style>\n<div class=\"d2r\">\n<div class=\"d2r-in\">\n    <div class=\"d2r-copy\">\n      <p class=\"d2r-eyebrow\">Aobo Steel &middot; Tool Steel Supplier &middot; Huangshi, China<\/p>\n      <h1 class=\"d2r-h1\">1.2379 ESR Mill Rolls<\/h1>\n      <p class=\"d2r-sub\">DIN 1.2379 \/ X153CrMoV12 &middot; AISI D2 &middot; JIS SKD11 &middot; electro-slag remelted<\/p>\n      <p class=\"d2r-lede\">ESR 1.2379 for work rolls and intermediate rolls in 20-high and Z-high cold rolling mills. Forged, spheroidize annealed and UT tested, with the heat number on every piece and the length cut to your drawing.<\/p>\n      <div class=\"d2r-spec\">\n        <div><b>Grade<\/b><span>DIN 1.2379 &middot; X153CrMoV12 (AISI D2 &middot; JIS SKD11 &middot; Cr12MoV)<\/span><\/div>\n        <div><b>Melting<\/b><span>ESR + EAF + LF + VD, electro-slag remelted<\/span><\/div>\n        <div class=\"hl\"><b>Sizes<\/b><span>&Oslash;120 to 500 mm, forged and turned<\/span><\/div>\n        <div class=\"hl\"><b>Hardness<\/b><span>58 to 62 HRC at the barrel after hardening and tempering<\/span><\/div>\n        <div><b>Lead time<\/b><span>40 days from ESR ingot<\/span><\/div>\n        <div class=\"row-docs\"><b>Documents<\/b><span>MTC EN 10204 3.1 per heat &middot; UT SEP 1921-82 D\/d<\/span><\/div>\n        <div class=\"row-order\"><b>Order size<\/b><span>MOQ 5 t &middot; mixed sizes in one container<\/span><\/div>\n      <\/div>\n      <p class=\"d2r-also\">Also supplied: <a href=\"https:\/\/aobosteel.com\/1-2379-tool-steel-round-bar\/\">1.2379 round bar<\/a> &middot; <a href=\"https:\/\/aobosteel.com\/d2-tool-steel\/\">D2 tool steel<\/a> &middot; <a href=\"https:\/\/aobosteel.com\/tool-steel-for-rolling-mill-rolls-tube-pipe-mill-rolls\/\">roll selection guide<\/a><\/p>\n    <\/div>\n\n        <div class=\"d2r-card\" id=\"d2r-form\">\n      <h2>Request price &amp; delivery<\/h2>\n      <p class=\"d2r-cardsub\">Send the roll drawing, or the barrel diameter and length with quantity and destination port. We confirm price and delivery in 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\/24726#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=\"90\"\/><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=\"d2r-or\">or <a href=\"https:\/\/wa.me\/8618062945370\">WhatsApp +86 180 6294 5370<\/a> &middot; <a href=\"mailto:sales@aobosteel.com\">sales@aobosteel.com<\/a><\/p>\n    <\/div>\n    <\/div>\n  <\/div>\n<script>\n(function(){\n  function patch(){\n    var els=document.querySelectorAll('#d2r-form .wpcf7-pum');\n    for(var i=0;i<els.length;i++){els[i].value='{\"closepopup\":false,\"closedelay\":0,\"openpopup\":false,\"openpopup_id\":0}';}\n  }\n  if(document.readyState!=='loading'){patch();}else{document.addEventListener('DOMContentLoaded',patch);}\n  setTimeout(patch,1200);\n})();\n<\/script><\/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\">Where 1.2379 Carries a Roll in a Cold Mill<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">1.2379 works as a work roll in <a href=\"https:\/\/aobosteel.com\/blog\/d2-tool-steel-sendzimir-cluster-mill-rolls\/\">cluster mills and Sendzimir mills<\/a>. A 12 percent chromium cold work steel suits that position because the roll runs almost entirely in compression, carrying the rolling force while taking wear and contact stress from the moving strip. The intermediate rolls around it hold the work roll against both vertical and horizontal deflection, so the high chromium steel never has to resist a bending load.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Roll type<\/th><th>Working hardness<\/th><th>What limits its life<\/th><\/tr><\/thead><tbody><tr><td>Cluster mill work roll<\/td><td>58 to 62 HRC<\/td><td>Spalling and wear from contact fatigue<\/td><\/tr><tr><td>Cluster mill intermediate and drive roll<\/td><td>58 to 62 HRC<\/td><td>Contact fatigue wear and spalling<\/td><\/tr><tr><td>Tube and pipe forming roll<\/td><td>58 to 62 HRC<\/td><td>Wear and edge chipping<\/td><\/tr><\/tbody><\/table><figcaption class=\"wp-element-caption\">Working hardness in service, measured at the barrel.<\/figcaption><\/figure>\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<h3 class=\"wp-block-heading\">Where 1.2379 Is the Wrong Buy<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Unsupported rolls in two-high and four-high stands carry heavy bending loads and deflect across the body, and a high chromium cold work steel has no toughness budget for that. Those stands run forged roll steel around 0.85 percent carbon and 1.75 percent chromium, or a hot work grade. And a cold mill grade does not belong in a hot rolling stand, where thermal cycling checks and spalls the surface within a few campaigns.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">What Decides Roll Life<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Hardness uniformity along the barrel sets gauge control and keeps stress from concentrating in one band. Retained austenite comes next. A quench leaves 6 to 18 percent of it, and the same sources put 25 percent as the ceiling for hardened steel, so a heavy section that is not tempered out moves in service and softens unevenly. Grinding burn matters as much as any of them, since a burnt layer of 0.02 to 0.03 mm turns into a soft patch and spalls on the first heavy pass. A generous fillet radius at the neck is what keeps fatigue cracking away from the journal. In service the order is micro-notches and pitting from cyclic contact, then crack growth, then a spall that ends the roll body.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Source: ASM Handbook, Volume 14, Forming and Forging, ASM International, 1988, and Tool Steels, ASM International, 1998.<\/em><\/p>\n\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Where 1.2379 Carries a Roll in a Cold Mill 1.2379 works as a work roll in cluster mills and Sendzimir mills. A 12 percent chromium cold work steel suits that position because the roll runs almost entirely in compression, carrying the rolling force while taking wear and contact stress from the moving strip. The intermediate [&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":"no-sidebar","site-content-layout":"","ast-site-content-layout":"full-width-container","site-content-style":"unboxed","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 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