{"id":15485,"date":"2026-05-16T16:27:21","date_gmt":"2026-05-16T08:27:21","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=15485"},"modified":"2026-10-23T09:54:08","modified_gmt":"2026-10-23T01:54:08","slug":"tool-steel-for-rolling-mill-rolls-tube-pipe-mill-rolls","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/ko\/tool-steel-for-rolling-mill-rolls-tube-pipe-mill-rolls\/","title":{"rendered":"\uc555\uc5f0\uae30 \ub864, \ud29c\ube0c \ubc0f \ud30c\uc774\ud504 \uc81c\uc870 \uacf5\uc7a5 \ub864\uc6a9 \uacf5\uad6c\uac15"},"content":{"rendered":"\n<h1 class=\"wp-block-heading has-text-align-center\" id=\"h-tool-steel-selection-for-rolling-mill-rolls-tube-amp-pipe-mill-rolls\">Tool Steel Selection for Rolling Mill Rolls, Tube &amp; Pipe Mill Rolls<\/h1>\n\n\n\n<p class=\"wp-block-paragraph\">Select tool steel by rolling temperature, roll size, galling risk, abrasive wear, hardenability, production volume, and surface hardness requirement. For rolling mill rolls, tube rolls, and pipe mill rolls, the main choice is usually between wear resistance, toughness, hot hardness, and through-section hardenability.<\/p>\n\n\n\n<h2 id=\"h-quick-selection-guide-by-tool-steel-grade\" class=\"wp-block-heading\">Quick Selection Guide by Tool Steel Grade<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Choose the grade according to whether the roll is used for cold rolling, hot rolling, backup rolls, tube and pipe mill rolls, or severe galling and wear conditions.<\/p>\n\n\n\n<style id=\"rmr-cards\" data-noptimize=\"1\">\n\/* Rolling mill \/ tube \/ pipe mill roll cards. Card values follow the site card baseline:\n   white, square corners, hairline border, soft shadow, no card hover. *\/\n.entry-content[class] .rmr-row{display:grid!important;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin:0 0 26px;padding:0}\n.entry-content[class] .rmr-row .wp-block-column{margin:0;padding:0;min-width:0}\n.entry-content[class] .rmr-card{background:#fff;border:1px solid rgba(0,0,0,.12);border-radius:0;\n  box-shadow:0 12px 32px rgba(0,0,0,.04);padding:20px;display:flex;flex-direction:column;flex:1 1 auto}\n.entry-content[class] .rmr-card .rmr-label{margin:0 0 8px!important;font-size:11.5px!important;font-weight:600!important;\n  line-height:1.4!important;letter-spacing:.08em!important;text-transform:uppercase!important;color:#6b7280!important}\n.entry-content[class] .rmr-card h3{margin:0!important;color:#0b0b0b!important;font-size:23px!important;\n  line-height:1.25!important;font-weight:700!important;letter-spacing:-.01em!important;text-transform:none!important}\n.entry-content[class] .rmr-card .rmr-codes{margin:4px 0 0!important;font-size:13px!important;font-weight:600!important;\n  line-height:1.5!important;color:#6b7280!important;letter-spacing:.01em!important}\n.entry-content[class] .rmr-card p{font-size:17px!important;line-height:1.7!important;color:#0b0b0b!important;\n  margin:12px 0 14px!important}\n.entry-content[class] .rmr-card .rmr-reason{margin:0 0 18px!important;padding:10px 12px!important;font-size:14.5px!important;\n  line-height:1.6!important;color:#4b5563!important;background:#f8fafc;border-left:3px solid #dbe3ee;border-radius:4px}\n.entry-content[class] .rmr-card .wp-block-buttons{margin:auto 0 0!important;gap:12px;flex-wrap:nowrap;align-items:stretch}\n.entry-content[class] .rmr-card .wp-block-button{flex:1 1 0;margin:0;min-width:0}\n.entry-content[class] .rmr-card .wp-block-button__link{width:100%;border-radius:999px;padding:10px 12px;\n  font-size:14px;line-height:1.25;font-weight:700;text-align:center;text-decoration:none;\n  background:#074fd0;border:1px solid #074fd0;color:#fff}\n.entry-content[class] .rmr-card .wp-block-button__link:hover{background:#063c9e;border-color:#063c9e;color:#fff}\n.entry-content[class] .rmr-card .is-style-outline .wp-block-button__link{background:transparent;\n  border:1px solid #0b0b0b;color:#0b0b0b;font-weight:400}\n.entry-content[class] .rmr-card .is-style-outline .wp-block-button__link:hover{background:#f4f8ff;color:#0b0b0b}\n@media(max-width:1000px){.entry-content[class] .rmr-row{grid-template-columns:repeat(2,minmax(0,1fr))}}\n@media(max-width:640px){.entry-content[class] .rmr-row{grid-template-columns:1fr}\n  .entry-content[class] .rmr-card .wp-block-buttons{flex-wrap:wrap;gap:10px}}\n<\/style>\n\n\n\n<div class=\"wp-block-columns rmr-row is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column rmr-card is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"rmr-label wp-block-paragraph\">Small Cold Rolls<\/p>\n\n\n\n<h3 id=\"h-o1-tool-steel\" class=\"wp-block-heading\">O1 Tool Steel<\/h3>\n\n\n\n<p class=\"rmr-codes wp-block-paragraph\">1.2510 \/ SKS3<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Recommended for short to medium-run cold rolling rolls and smaller roll applications.<\/p>\n\n\n\n<p class=\"rmr-reason wp-block-paragraph\">Reason: O1 provides good machinability, moderate cost, and useful hardness for cold rolls where extreme wear resistance is not required.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-outline is-style-outline--1\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/aobosteel.com\/o1-tool-steel\/\">View Details<\/a><\/div>\n\n\n\n<div class=\"wp-block-button popmake-16052\"><a class=\"wp-block-button__link wp-element-button\">Send Inquiry<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column rmr-card is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"rmr-label wp-block-paragraph\">Tough Cold Rolls<\/p>\n\n\n\n<h3 id=\"h-l6-tool-steel\" class=\"wp-block-heading\">L6 Tool Steel<\/h3>\n\n\n\n<p class=\"rmr-codes wp-block-paragraph\">1.2714 \/ SKT4<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Recommended for short to medium-run cold rolls where toughness and machinability are important.<\/p>\n\n\n\n<p class=\"rmr-reason wp-block-paragraph\">Reason: L6 offers a practical combination of toughness, moderate cost, and through-hardening ability for cold roll applications.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-outline is-style-outline--2\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/aobosteel.com\/l6-tool-steel\/\">View Details<\/a><\/div>\n\n\n\n<div class=\"wp-block-button popmake-16052\"><a class=\"wp-block-button__link wp-element-button\">Send Inquiry<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column rmr-card is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"rmr-label wp-block-paragraph\">Medium-Large Rolls<\/p>\n\n\n\n<h3 id=\"h-a2-tool-steel\" class=\"wp-block-heading\">A2 Tool Steel<\/h3>\n\n\n\n<p class=\"rmr-codes wp-block-paragraph\">1.2363 \/ SKD12<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Recommended for medium to large work rolls and backup rolls.<\/p>\n\n\n\n<p class=\"rmr-reason wp-block-paragraph\">Reason: A2 can through-harden larger roll sections with low distortion, giving a balance of wear resistance and toughness.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-outline is-style-outline--3\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/aobosteel.com\/a2-tool-steel\/\">View Details<\/a><\/div>\n\n\n\n<div class=\"wp-block-button popmake-16052\"><a class=\"wp-block-button__link wp-element-button\">Send Inquiry<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns rmr-row is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column rmr-card is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"rmr-label wp-block-paragraph\">Long-Run Cold Rolls<\/p>\n\n\n\n<h3 id=\"h-d2-tool-steel\" class=\"wp-block-heading\">D2 Tool Steel<\/h3>\n\n\n\n<p class=\"rmr-codes wp-block-paragraph\">1.2379 \/ SKD11 \/ Cr12Mo1V1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Recommended for <a href=\"https:\/\/aobosteel.com\/blog\/d2-tool-steel-sendzimir-cluster-mill-rolls\/\">long-run cold rolling rolls<\/a> where high wear resistance and longer roll life are required.<\/p>\n\n\n\n<p class=\"rmr-reason wp-block-paragraph\">Reason: D2 provides high chromium carbide wear resistance and deep-hardening behavior for cold rolls under severe abrasive wear.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-outline is-style-outline--4\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/aobosteel.com\/d2-tool-steel\/\">View Details<\/a><\/div>\n\n\n\n<div class=\"wp-block-button popmake-16052\"><a class=\"wp-block-button__link wp-element-button\">Send Inquiry<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column rmr-card is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"rmr-label wp-block-paragraph\">Severe Galling Risk<\/p>\n\n\n\n<h3 id=\"h-m42-high-speed-steel\" class=\"wp-block-heading\">M42 High Speed Steel<\/h3>\n\n\n\n<p class=\"rmr-codes wp-block-paragraph\">1.3247 \/ SKH59<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Recommended for severe rolling conditions where galling resistance and maximum wear life are required.<\/p>\n\n\n\n<p class=\"rmr-reason wp-block-paragraph\">Reason: M42 is a cobalt-molybdenum high-speed steel direction for difficult rolling conditions where standard cold-work steels wear or gall too quickly.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-outline is-style-outline--5\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/aobosteel.com\/m42-tool-steel\/\">View Details<\/a><\/div>\n\n\n\n<div class=\"wp-block-button popmake-16052\"><a class=\"wp-block-button__link wp-element-button\">Send Inquiry<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column rmr-card is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"rmr-label wp-block-paragraph\">Hot Rolls<\/p>\n\n\n\n<h3 id=\"h-h13-tool-steel\" class=\"wp-block-heading\">H13 Tool Steel<\/h3>\n\n\n\n<p class=\"rmr-codes wp-block-paragraph\">1.2344 \/ SKD61<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Recommended for short to medium-run hot rolls, backup rolls, and mandrels in high-speed ring rolling mills.<\/p>\n\n\n\n<p class=\"rmr-reason wp-block-paragraph\">Reason: H13 provides hot toughness, resistance to thermal fatigue, and useful hot hardness for low to medium-temperature hot rolling.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-outline is-style-outline--6\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/aobosteel.com\/h13-tool-steel\/\">View Details<\/a><\/div>\n\n\n\n<div class=\"wp-block-button popmake-16052\"><a class=\"wp-block-button__link wp-element-button\">Send Inquiry<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns rmr-row is-layout-flex wp-container-core-columns-is-layout-7387b849 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column rmr-card is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"rmr-label wp-block-paragraph\">Tough Hot Rolls<\/p>\n\n\n\n<h3 id=\"h-h11-tool-steel\" class=\"wp-block-heading\">H11 Tool Steel<\/h3>\n\n\n\n<p class=\"rmr-codes wp-block-paragraph\">1.2343 \/ SKD6<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Recommended for hot rolls and backup rolls requiring toughness under elevated temperature.<\/p>\n\n\n\n<p class=\"rmr-reason wp-block-paragraph\">Reason: H11 is selected when hot-work toughness and resistance to thermal fatigue are more important than maximum hot wear resistance.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-outline is-style-outline--7\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/aobosteel.com\/h11-tool-steel\/\">View Details<\/a><\/div>\n\n\n\n<div class=\"wp-block-button popmake-16052\"><a class=\"wp-block-button__link wp-element-button\">Send Inquiry<\/a><\/div>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-column rmr-card is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"rmr-label wp-block-paragraph\">High-Temperature Rolls<\/p>\n\n\n\n<h3 id=\"h-h21-tool-steel\" class=\"wp-block-heading\">H21 Tool Steel<\/h3>\n\n\n\n<p class=\"rmr-codes wp-block-paragraph\">1.2581 \/ SKD5<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Recommended for long production hot rolling or special alloy rolling at very high temperatures.<\/p>\n\n\n\n<p class=\"rmr-reason wp-block-paragraph\">Reason: H21 contains high tungsten, providing stronger hot hardness and resistance to softening under severe hot rolling conditions.<\/p>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button is-style-outline is-style-outline--8\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/aobosteel.com\/h21-tool-steel\/\">View Details<\/a><\/div>\n\n\n\n<div class=\"wp-block-button popmake-16052\"><a class=\"wp-block-button__link wp-element-button\">Send Inquiry<\/a><\/div>\n<\/div>\n<\/div>\n<\/div>\n\n\n\n<h2 id=\"h-selection-summary\" class=\"wp-block-heading\">Selection Summary<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This table gives a faster comparison when the buyer already knows the roll type and main failure risk.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><thead><tr><th class=\"has-text-align-left\" data-align=\"left\">Roll Application<\/th><th class=\"has-text-align-left\" data-align=\"left\">Main Requirement<\/th><th class=\"has-text-align-left\" data-align=\"left\">Aobo Steel Grades<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-left\" data-align=\"left\">Small cold rolls and short to medium-run rolling<\/td><td class=\"has-text-align-left\" data-align=\"left\">Machinability, moderate cost, and useful surface hardness<\/td><td class=\"has-text-align-left\" data-align=\"left\">O1, L6<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Medium to large work rolls and backup rolls<\/td><td class=\"has-text-align-left\" data-align=\"left\">Through-section hardenability, low distortion, and toughness<\/td><td class=\"has-text-align-left\" data-align=\"left\">A2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Long-run cold rolling and mass production<\/td><td class=\"has-text-align-left\" data-align=\"left\">High abrasive wear resistance and longer roll life<\/td><td class=\"has-text-align-left\" data-align=\"left\">D2<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Severe galling or abrasive rolling conditions<\/td><td class=\"has-text-align-left\" data-align=\"left\">Galling resistance and maximum wear life<\/td><td class=\"has-text-align-left\" data-align=\"left\">M42<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Short to medium-run hot rolls and backup rolls<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hot toughness, thermal fatigue resistance, and moderate hot hardness<\/td><td class=\"has-text-align-left\" data-align=\"left\">H13, H11<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">High-temperature hot rolling or special alloy rolling<\/td><td class=\"has-text-align-left\" data-align=\"left\">Red hardness and resistance to softening at elevated temperature<\/td><td class=\"has-text-align-left\" data-align=\"left\">H21<\/td><\/tr><tr><td class=\"has-text-align-left\" data-align=\"left\">Tube and pipe mill rolls where deep hardness is needed<\/td><td class=\"has-text-align-left\" data-align=\"left\">Hardenability, wear resistance, and galling control<\/td><td class=\"has-text-align-left\" data-align=\"left\">O1, D2, M42<\/td><\/tr><\/tbody><\/table><\/figure>\n\n","protected":false},"excerpt":{"rendered":"<p>Tool Steel Selection for Rolling Mill Rolls, Tube &amp; Pipe Mill Rolls Select tool steel by rolling temperature, roll size, galling risk, abrasive wear, hardenability, production volume, and surface hardness requirement. For rolling mill rolls, tube rolls, and pipe mill rolls, the main choice is usually between wear resistance, toughness, hot hardness, and through-section hardenability. [&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":"normal-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":"","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":"set","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-15485","page","type-page","status-publish","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.7 (Yoast SEO v28.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Tool Steel for Rolling Mill Rolls, Tube &amp; Pipe Mill Rolls - AoboSteel<\/title>\n<meta name=\"description\" content=\"Select O1, L6, A2, D2, H11, H13, H21, or M42 tool steel for rolling mill rolls and tube mill rolls by wear, galling, hot hardness, and hardenability.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/aobosteel.com\/ko\/tool-steel-for-rolling-mill-rolls-tube-pipe-mill-rolls\/\" \/>\n<meta property=\"og:locale\" content=\"ko_KR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tool Steel for Rolling Mill Rolls, Tube &amp; Pipe Mill Rolls\" \/>\n<meta property=\"og:description\" content=\"Select O1, L6, A2, D2, H11, H13, H21, or M42 tool steel for rolling mill rolls and tube mill rolls by wear, galling, hot hardness, and hardenability.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/aobosteel.com\/ko\/tool-steel-for-rolling-mill-rolls-tube-pipe-mill-rolls\/\" \/>\n<meta property=\"og:site_name\" content=\"AoboSteel\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/profile.php?id=61565368220197\" \/>\n<meta property=\"article:modified_time\" content=\"2026-10-23T01:54:08+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\uc608\uc0c1 \ub418\ub294 \ud310\ub3c5 \uc2dc\uac04\" \/>\n\t<meta name=\"twitter:data1\" content=\"3\ubd84\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"TechArticle\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/tool-steel-for-rolling-mill-rolls-tube-pipe-mill-rolls\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/aobosteel.com\\\/tool-steel-for-rolling-mill-rolls-tube-pipe-mill-rolls\\\/\"},\"author\":{\"name\":\"Evan\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/#\\\/schema\\\/person\\\/96118415c30ca6bb52eaf1127b052ef7\"},\"headline\":\"Tool Steel for Rolling Mill Rolls, Tube &amp; 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