{"id":13560,"date":"2026-03-12T18:00:50","date_gmt":"2026-03-12T10:00:50","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=13560"},"modified":"2026-05-25T15:38:04","modified_gmt":"2026-05-25T07:38:04","slug":"h13-vs-h11-tool-steel","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/h13-vs-h11-tool-steel\/","title":{"rendered":"H13 vs H11 Tool Steel: Heat Wear or Impact Cracking?"},"content":{"rendered":"<section class=\"aobo-h13-h11-page\">\n  <style>\n    .aobo-h13-h11-page {\n      --aobo-blue: #0c56d0;\n      --aobo-blue-dark: #073b8e;\n      --aobo-blue-soft: #eaf2ff;\n      --aobo-blue-line: #c9dcff;\n      --aobo-border: #d7e5fb;\n      --aobo-text: #203044;\n      --aobo-muted: #617087;\n      --aobo-orange: #f59b23;\n      --aobo-white: #ffffff;\n      --aobo-shadow: 0 18px 45px rgba(12, 86, 208, 0.10);\n      font-family: Arial, Helvetica, sans-serif;\n      color: var(--aobo-text);\n      line-height: 1.7;\n      background: transparent;\n      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.aobo-product-strip {\n        padding: 20px;\n      }\n\n      .aobo-product-grid,\n      .aobo-choice-grid {\n        grid-template-columns: 1fr;\n      }\n\n      .aobo-buttons {\n        flex-direction: column;\n      }\n\n      .aobo-article h2 {\n        font-size: 25px;\n      }\n    }\n  <\/style>\n\n  <div class=\"aobo-wrap\">\n    <header class=\"aobo-hero\">\n      <span class=\"aobo-eyebrow\">Hot-Work Tool Steel Selection<\/span>\n      <h1>H13 vs H11 Tool Steel: Heat Wear, Cracking, and Tool Failure Comparison<\/h1>\n      <p>H13 and H11 are both 5% chromium hot-work tool steels used for dies, molds, inserts, punches, and high-temperature tooling. They have similar alloy systems, but they are not selected for the same failure conditions.<\/p>\n      <p>Select H13 if the tool fails due to heat, hot wear, surface erosion, heat checking, or hardness loss. Opt for H11 if failure is caused by impact, cracking, fracture, or large-section stress.<\/p>\n    <\/header>\n\n    <section class=\"aobo-product-strip\" aria-label=\"H13 and H11 tool steel products from Aobo Steel\">\n      <h2>H13 and H11 Tool Steel Available from Aobo Steel<\/h2>\n      <p class=\"aobo-strip-intro\">Aobo Steel supplies H13 and H11 hot-work tool steels for die casting dies, extrusion tools, forging dies, hot punches, inserts, cores, and high-temperature tooling.<\/p>\n\n      <div class=\"aobo-product-grid\">\n        <article class=\"aobo-product-card\">\n          <div class=\"aobo-product-image\">\n            <img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/H13-STEEL-FLAT-BAR.avif\" alt=\"H13 tool steel supplied by Aobo Steel\" loading=\"lazy\">\n          <\/div>\n          <h3>H13 | 1,2344 | SKD61<\/h3>\n          <p class=\"aobo-card-note\">Hot-work tool steel for hot wear, die casting, extrusion tooling, heat checking resistance, nitriding response, and hot surface stability.<\/p>\n          <div class=\"aobo-buttons\">\n            <a class=\"aobo-btn aobo-btn-detail\" href=\"https:\/\/aobosteel.com\/pt\/h13-tool-steel\/\">Ver detalhes<\/a>\n            <a class=\"aobo-btn aobo-btn-inquiry hs-cta-trigger-button hs-cta-trigger-button-230288465624\" href=\"javascript:void(0);\">Enviar consulta<\/a>\n          <\/div>\n        <\/article>\n\n        <article class=\"aobo-product-card\">\n          <div class=\"aobo-product-image\">\n            <img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/H11-TOOL-STEEL-FLAT.avif\" alt=\"H11 tool steel supplied by Aobo Steel\" loading=\"lazy\">\n          <\/div>\n          <h3>H11 | 1,2343 | SKD6<\/h3>\n          <p class=\"aobo-card-note\">Hot-work tool steel for impact, cracking resistance, fracture-sensitive tooling, hot punches, forging dies, and large stressed tools.<\/p>\n          <div class=\"aobo-buttons\">\n            <a class=\"aobo-btn aobo-btn-detail\" href=\"https:\/\/aobosteel.com\/pt\/h11-tool-steel\/\">Ver detalhes<\/a>\n            <a class=\"aobo-btn aobo-btn-inquiry hs-cta-trigger-button hs-cta-trigger-button-230288465624\" href=\"javascript:void(0);\">Enviar consulta<\/a>\n          <\/div>\n        <\/article>\n      <\/div>\n    <\/section>\n\n    <main class=\"aobo-article\">\n      <h2>H13 vs H11 Tool Steel at a Glance<\/h2>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Selection Question<\/th><th>Better Starting Choice<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>Hot wear, erosion, washing, or surface degradation controls tool life<\/td><td>H13<\/td><\/tr>\n            <tr><td>Impact, cracking, chipping, or fracture controls tool life<\/td><td>H11<\/td><\/tr>\n            <tr><td>Die casting or extrusion tooling needs better hot surface stability<\/td><td>H13<\/td><\/tr>\n            <tr><td>Forging dies, hot punches, or large tools need stronger crack resistance<\/td><td>H11<\/td><\/tr>\n            <tr><td>Severe nitrided hot-wear surface is required<\/td><td>H13<\/td><\/tr>\n            <tr><td>Better machinability is important<\/td><td>H11<\/td><\/tr>\n            <tr><td>High polishability is required, especially for precision molds<\/td><td>ESR H13<\/td><\/tr>\n            <tr><td>The real failure mode is unclear<\/td><td>Review working condition before selecting<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>H13 is usually the stronger starting point for hot-wear tooling. H11 is safer when cracking, impact, or fracture is the main concern.<\/p>\n\n      <h2>H13 vs H11 Tool Steel Equivalent Grades<\/h2>\n      <p>Different countries and standards use different names for H13 and H11. These designations help users compare materials across markets, but they are not automatic substitutes. For tooling applications, equivalent grades should always be confirmed based on chemical composition, hardness condition, melting route, inspection requirements, and working conditions.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Sistema padr\u00e3o<\/th><th>A\u00e7o para ferramentas H13<\/th><th>A\u00e7o para ferramentas H11<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>ONU<\/td><td>T20813<\/td><td>T20811<\/td><\/tr>\n            <tr><td>DIN \/ EN<\/td><td>1.2344 \/ X40CrMoV5-1<\/td><td>1.2343 \/ X38CrMoV5-1<\/td><\/tr>\n            <tr><td>JIS<\/td><td>SKD61<\/td><td>SKD6<\/td><\/tr>\n            <tr><td>GB \/ China<\/td><td>4Cr5MoSiV1<\/td><td>Confirm by composition or H11-type specification<\/td><\/tr>\n            <tr><td>AFNOR \/ France<\/td><td>Z40CDV5<\/td><td>Z38CDV5<\/td><\/tr>\n            <tr><td>BS \/ UK<\/td><td>BH13<\/td><td>BH11<\/td><\/tr>\n            <tr><td>SS \/ Sweden<\/td><td>2242<\/td><td>\u2013<\/td><\/tr>\n            <tr><td>UNI \/ Italy<\/td><td>\u2013<\/td><td>X35CrMo05KU<\/td><\/tr>\n            <tr><td>ASTM<\/td><td>A681 H13<\/td><td>A681 H11<\/td><\/tr>\n            <tr><td>Aerospace AMS<\/td><td>\u2013<\/td><td>AMS 6437 \/ 6485 \/ 6487 \/ 6488<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n\n      <h2>Chemical Composition Difference Between H13 and H11<\/h2>\n      <p>The main chemical difference between H13 and H11 is vanadium content.<\/p>\n      <p>H13 contains more vanadium, which promotes the formation of hard carbides. This improves hot-wear resistance, surface stability, and resistance to softening during hot service.<\/p>\n      <p>H11 contains less vanadium, which reduces carbide volume and helps improve toughness, machinability, and crack resistance.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Elemento<\/th><th>H11 Typical Range (%)<\/th><th>H13 Typical Range (%)<\/th><th>Significado pr\u00e1tico<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>Carbono<\/td><td>0.33-0.43<\/td><td>0.32-0.45<\/td><td>Similar hardening base<\/td><\/tr>\n            <tr><td>Cromo<\/td><td>4.75-5.50<\/td><td>4.75-5.50<\/td><td>Both belong to the 5% chromium hot-work steel family<\/td><\/tr>\n            <tr><td>Molibd\u00eanio<\/td><td>1.10-1.60<\/td><td>1.10-1.75<\/td><td>Supports hot strength and temper resistance<\/td><\/tr>\n            <tr><td>Van\u00e1dio<\/td><td>0.30-0.60<\/td><td>0.80-1.20<\/td><td>H13 gains stronger carbide-supported wear resistance<\/td><\/tr>\n            <tr><td>Sil\u00edcio<\/td><td>0.80-1.20<\/td><td>0.80-1.20<\/td><td>Supports hot-work performance and oxidation resistance<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>Thus, H13 prioritizes hot wear and surface stability, while H11 emphasizes toughness and fracture resistance.<\/p>\n\n      <h2>Performance Comparison of H13 and H11<\/h2>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Performance Factor<\/th><th>A\u00e7o para ferramentas H13<\/th><th>A\u00e7o para ferramentas H11<\/th><th>Selection Meaning<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>Resist\u00eancia ao desgaste<\/td><td>Mais alto<\/td><td>Moderate to good<\/td><td>Choose H13 when surface wear controls tool life<\/td><\/tr>\n            <tr><td>Dureza quente<\/td><td>Better under sustained heat<\/td><td>Bom<\/td><td>Choose H13 when the tool must resist softening during hot contact<\/td><\/tr>\n            <tr><td>Robustez<\/td><td>Bom<\/td><td>Melhorar<\/td><td>Choose H11 when cracking or chipping is the main risk<\/td><\/tr>\n            <tr><td>Shock resistance<\/td><td>Bom<\/td><td>Melhorar<\/td><td>Choose H11 for impact-loaded tooling<\/td><\/tr>\n            <tr><td>Heat checking resistance<\/td><td>Strong in many die casting and extrusion conditions<\/td><td>Good, especially when crack growth is the main concern<\/td><td>Choose based on whether surface damage or crack propagation is more serious<\/td><\/tr>\n            <tr><td>Usinabilidade<\/td><td>More difficult<\/td><td>Easier<\/td><td>H11 may reduce machining difficulty<\/td><\/tr>\n            <tr><td>Nitriding response<\/td><td>Excelente<\/td><td>Good to excellent<\/td><td>H13 is often preferred for severe hot-wear surfaces<\/td><\/tr>\n            <tr><td>Large-section reliability<\/td><td>Good with proper processing<\/td><td>Often safer where cracking risk is high<\/td><td>H11 may be considered for large or highly stressed tools<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n\n      <h2>Resist\u00eancia ao desgaste e dureza a quente<\/h2>\n      <p>H13 performs better when the working surface is exposed to hot abrasion, molten metal flow, erosion, washing, or high-friction contact. This makes it a strong choice for die-casting dies, extrusion tools, hot-forming tools, and molds where surface stability controls tool life.<\/p>\n      <p>H13 also has better resistance to hardness loss under prolonged hot contact. However, the safe working temperature should not be treated as a fixed number. It depends on the hardness requirement, tempering condition, cooling practice, and expected tool life.<\/p>\n\n      <h2>Toughness and Crack Resistance<\/h2>\n      <p>H11 performs better when the tool is exposed to impact, stress concentration, cyclic mechanical loading, or large-section stress. It is less sensitive to crack initiation and crack propagation than H13 under severe mechanical loading.<\/p>\n      <p>This makes H11 useful for hammer forging dies, hot punches, large hot-work tools, and applications where sudden fracture is more dangerous than gradual surface wear.<\/p>\n\n      <h2>Fadiga T\u00e9rmica e Verifica\u00e7\u00e3o de Calor<\/h2>\n      <p>Both steels can suffer from heat checking under repeated heating and cooling.<\/p>\n      <p>H13 is usually preferred when the main damage starts at the surface, such as heat checking or erosion. H13 is ideal for surface-initiated damage. H11 suits combined thermal and heavy mechanical stress, where crack resistance is more important than maximum surface wear resistance.<\/p>\n      <p>A tool that wears out at the surface should not be selected the same way as a tool that cracks under impact.<\/p>\n\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Application \/ Condition<\/th><th>Better Starting Choice<\/th><th>Reason<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>Matrizes de fundi\u00e7\u00e3o de alum\u00ednio<\/td><td>H13<\/td><td>Better resistance to heat checking, molten metal erosion, and hot surface wear<\/td><\/tr>\n            <tr><td>Magnesium or brass die casting<\/td><td>H13<\/td><td>Stronger hot hardness and surface stability under thermal cycling<\/td><\/tr>\n            <tr><td>Zinc die casting<\/td><td>H13 or H11<\/td><td>H13 for surface wear; H11 where lower operating temperature and cracking risk matter<\/td><\/tr>\n            <tr><td>Die casting inserts and cores<\/td><td>H13 \/ ESR H13<\/td><td>Better surface stability, polishability, and heat-checking resistance<\/td><\/tr>\n            <tr><td>Matrizes de extrus\u00e3o a quente<\/td><td>H13<\/td><td>Better hot wear resistance and resistance to thermal softening<\/td><\/tr>\n            <tr><td>Extrusion mandrels and dummy blocks<\/td><td>H13 or H11<\/td><td>H13 for wear; H11 for impact or stress concentration<\/td><\/tr>\n            <tr><td>Hammer forging dies<\/td><td>H11<\/td><td>Better toughness and shock resistance<\/td><\/tr>\n            <tr><td>Hot punches and hot-heading dies<\/td><td>H11<\/td><td>Better resistance to impact and cracking<\/td><\/tr>\n            <tr><td>Forging dies with severe abrasive wear<\/td><td>H13<\/td><td>Better surface wear resistance<\/td><\/tr>\n            <tr><td>Large hot-work die blocks<\/td><td>H11 may be considered<\/td><td>Section size and crack resistance become more important<\/td><\/tr>\n            <tr><td>L\u00e2minas de corte a quente<\/td><td>H11 or H13<\/td><td>H11 for impact; H13 for hot wear<\/td><\/tr>\n            <tr><td>Moldes de inje\u00e7\u00e3o de pl\u00e1stico<\/td><td>H13<\/td><td>Good wear resistance, polishability, and nitriding response<\/td><\/tr>\n            <tr><td>High-stress structural components<\/td><td>H11<\/td><td>Better toughness, strength, and fatigue resistance<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>For most die-casting and hot-work tools, start with H13 due to its hot-work properties. For tools exposed to severe impact, large sections, or high cracking risk, give stronger consideration to H11 for its toughness.<\/p>\n\n      <h2>Manufacturing Differences<\/h2>\n      <p>H13 and H11 are similar in heat-treatment behavior, but their carbide content affects machining, surface treatment, and post-heat-treatment performance.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Manufacturing Factor<\/th><th>A\u00e7o para ferramentas H13<\/th><th>A\u00e7o para ferramentas H11<\/th><th>Significado pr\u00e1tico<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>Usinabilidade<\/td><td>45-55% relative rating<\/td><td>55-65% relative rating<\/td><td>H11 is usually easier to machine<\/td><\/tr>\n            <tr><td>Distor\u00e7\u00e3o do tratamento t\u00e9rmico<\/td><td>Low when properly controlled<\/td><td>Low when properly controlled<\/td><td>Both are suitable for complex tools<\/td><\/tr>\n            <tr><td>T\u00eampera<\/td><td>High-temperature tempering is required<\/td><td>High-temperature tempering is required<\/td><td>Correct tempering is necessary to balance hardness and toughness<\/td><\/tr>\n            <tr><td>Nitriding response<\/td><td>Excelente<\/td><td>Good to excellent<\/td><td>H13 is often preferred for severe hot-wear service<\/td><\/tr>\n            <tr><td>Weld repair<\/td><td>Possible but requires strict control<\/td><td>Possible but requires strict control<\/td><td>Both need preheating, slow cooling, and post-weld treatment<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>H11 is usually easier to machine because it contains less vanadium and fewer hard carbides. H13 is harder on cutting tools, but it offers better hot-wear resistance after proper heat treatment and surface engineering.<\/p>\n      <p>Both grades require proper heat treatment and atmosphere control. For precision dies and hot-work tooling, vacuum heat treatment or a controlled protective atmosphere is usually preferred.<\/p>\n      <p>Nitriding can improve surface wear resistance in both grades. H13 is often the stronger choice when nitriding is used to improve resistance to severe hot wear, galling, or erosion.<\/p>\n\n      <h2>Common Selection Mistakes<\/h2>\n      <p>The main mistakes are not caused by grade names. They usually come from misunderstanding the real failure mode.<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead><tr><th>Mistake<\/th><th>Resultado<\/th><\/tr><\/thead>\n          <tbody>\n            <tr><td>Using H13 when impact fracture is the real failure mode<\/td><td>The tool may crack or chip before wear life is reached<\/td><\/tr>\n            <tr><td>Using H11 when severe hot wear controls tool life<\/td><td>The surface may wear, erode, or soften too quickly<\/td><\/tr>\n            <tr><td>Treating H13 and H11 as direct substitutes<\/td><td>The selected grade may not match the stress, temperature, or wear condition<\/td><\/tr>\n            <tr><td>Choosing only by hardness<\/td><td>Hardness alone does not show wear resistance, toughness, or thermal fatigue behavior<\/td><\/tr>\n            <tr><td>Ignoring section size<\/td><td>Large tools need stronger attention to crack resistance and heat-treatment uniformity<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>For H13, the common selection mistake is using it where impact fracture is more serious than surface wear.<\/p>\n      <p>For H11, the common selection mistake is using it where severe hot wear, erosion, or long-term thermal softening controls tool life.<\/p>\n\n      <h2>Final Recommendation<\/h2>\n      <div class=\"aobo-choice-grid\">\n        <article class=\"aobo-choice-card\">\n          <h3>Choose H13 for hot-wear tooling<\/h3>\n          <p>Choose H13 tool steel if the tool must resist high temperatures, hot wear, surface erosion, heat checking, thermal softening, or severe surface degradation.<\/p>\n        <\/article>\n        <article class=\"aobo-choice-card\">\n          <h3>Choose H11 for crack-sensitive tooling<\/h3>\n          <p>Select H11 tool steel when the tool most often fails due to impact, cracking, fracture, stress concentration, or large-section mechanical stress.<\/p>\n        <\/article>\n      <\/div>\n      <div class=\"aobo-note-box\">\n        <p>H13 is usually better for hot-wear tooling. H11 is usually better for impact-loaded and crack-sensitive tooling. Confirm working condition, heat-treatment route, inspection requirements, and actual tool failure mode before replacing one grade with another.<\/p>\n      <\/div>\n    <\/main>\n\n    <section class=\"aobo-final-cta\">\n      <div>\n        <h2>Need H13 or H11 hot-work tool steel?<\/h2>\n        <p>Aobo Steel supplies H13 and H11 tool steel for die casting, extrusion, forging, hot punching, inserts, cores, and high-temperature tooling applications.<\/p>\n      <\/div>\n      <a class=\"aobo-btn hs-cta-trigger-button hs-cta-trigger-button-230288465624\" href=\"javascript:void(0);\">Enviar consulta<\/a>\n    <\/section>\n  <\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>Hot-Work Tool Steel Selection H13 vs H11 Tool Steel: Heat Wear, Cracking, and Tool Failure Comparison H13 and H11 are both 5% chromium hot-work tool steels used for dies, molds, inserts, punches, and high-temperature tooling. They have similar alloy systems, but they are not selected for the same failure conditions. Select H13 if the tool [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":15379,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"content-type":"","_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":"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":"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-13560","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.7 (Yoast SEO v27.7) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>H13 vs H11 Tool Steel: Heat Wear or Impact Cracking? -Aobo Steel<\/title>\n<meta name=\"description\" content=\"Compare H13 vs H11 tool steel in wear resistance, toughness, hot hardness, and applications. 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