{"id":15195,"date":"2026-05-09T20:34:05","date_gmt":"2026-05-09T12:34:05","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=15195"},"modified":"2026-06-25T15:36:41","modified_gmt":"2026-06-25T07:36:41","slug":"s7-tool-steel-rockwell-hardness-chart","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/es\/s7-tool-steel-rockwell-hardness-chart\/","title":{"rendered":"Tabla de dureza Rockwell del acero para herramientas S7 | HRC, HB y rango de trabajo"},"content":{"rendered":"<section class=\"aobo-s7-hardness-page\">\n  <style>\n    .aobo-s7-hardness-page {\n      --aobo-blue: #0054d6;\n      --aobo-blue-dark: #003f9e;\n      --aobo-light-blue: #eaf4ff;\n      --aobo-soft-blue: #f5faff;\n      --aobo-border: #cfe0f5;\n      --aobo-orange: #f45a22;\n      --aobo-orange-soft: #fff2eb;\n      --aobo-text: #18324a;\n      --aobo-muted: #536b86;\n      --aobo-white: #ffffff;\n      font-family:inherit;\n      color: var(--aobo-text);\n      line-height: 1.7;\n      background: 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var(--aobo-orange);\n    }\n\n    .aobo-cta .aobo-btn-secondary:hover {\n      background: #de4511;\n      color: #ffffff;\n      border-color: #de4511;\n    }\n\n    @media (max-width: 980px) {\n      .aobo-highlight-grid,\n      .aobo-logic-grid,\n      .aobo-cta-inner {\n        grid-template-columns: 1fr;\n      }\n    }\n\n    @media (max-width: 640px) {\n      .aobo-s7-hardness-page {\n        padding: 0;\n      }\n\n      .aobo-hero {\n        padding: 28px 22px;\n        border-radius: 22px;\n      }\n\n      .aobo-hero h1 {\n        font-size: 30px;\n      }\n\n      .aobo-section-head {\n        flex-direction: column;\n        align-items: flex-start;\n      }\n\n      .aobo-section-body,\n      .aobo-section-head,\n      .aobo-highlight,\n      .aobo-cta {\n        padding: 22px;\n      }\n\n      .aobo-supply-block {\n        grid-template-columns: 1fr;\n        gap: 18px;\n        padding: 20px;\n      }\n\n      .aobo-supply-image {\n        width: min(190px, 100%);\n        margin: 0 auto;\n      }\n\n      .aobo-supply-image img {\n        width: 100%;\n      }\n\n      .aobo-supply-actions .aobo-btn {\n        width: 100%;\n      }\n    }\n  <\/style>\n\n  <div class=\"aobo-page-wrap\">\n    <header class=\"aobo-hero\">\n      <span class=\"aobo-kicker\">Aobo Steel S7 Hardness Reference<\/span>\n      <h1>S7 Tool Steel Rockwell Hardness Chart<\/h1>\n      <p>\n        S7 tool steel is usually supplied in the annealed condition at about 187-223 HB. After hardening and tempering, the common working hardness is about 54-58 HRC. For many shock-loaded tools such as punches, chisels, shear blades, and cold-forming tools, 56-58 HRC is often the practical center because it keeps useful edge strength while preserving S7&#8217;s main advantage: impact resistance.\n      <\/p>\n\n    <\/header>\n\n    <section class=\"aobo-supply-block\">\n      <div class=\"aobo-supply-image\">\n        <img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/S7.webp\" alt=\"S7 tool steel bar stock supplied by Aobo Steel\" loading=\"lazy\">\n      <\/div>\n      <div class=\"aobo-supply-content\">\n        <p>Aobo Steel supplies S7 tool steel in the annealed condition, ready for machining and in-house heat treatment. Check the available sizes and stock, or send your requirement for a quote.<\/p>\n        <div class=\"aobo-supply-actions\">\n          <a class=\"aobo-btn aobo-btn-primary popmake-16052\" href=\"javascript:void(0);\">Enviar consulta<\/a>\n          <a class=\"aobo-btn aobo-btn-secondary\" href=\"https:\/\/aobosteel.com\/es\/s7-tool-steel\/\">Ver detalles de suministro de S7<\/a>\n        <\/div>\n      <\/div>\n    <\/section>\n\n    <section class=\"aobo-section\">\n      <div class=\"aobo-section-head\">\n        <h2>S7 Tool Steel Hardness Chart<\/h2>\n      <\/div>\n      <div class=\"aobo-section-body\">\n        <p>\n          The table below summarizes typical S7 tool steel hardness values in annealed, as-quenched, tempered, and application-based conditions.\n        <\/p>\n\n        <div class=\"aobo-table-wrap\">\n          <table class=\"aobo-table\">\n            <thead>\n              <tr>\n                <th>S7 Condition<\/th>\n                <th>Dureza t\u00edpica<\/th>\n                <th>Significado pr\u00e1ctico<\/th>\n              <\/tr>\n            <\/thead>\n            <tbody>\n              <tr>\n                <td>Annealed condition<\/td>\n                <td>187-223 HB<\/td>\n                <td>Normal supply condition for machining.<\/td>\n              <\/tr>\n              <tr>\n                <td>Annealed upper reference<\/td>\n                <td>about 230 HB max<\/td>\n                <td>Common upper limit in some supplier data.<\/td>\n              <\/tr>\n              <tr>\n                <td>As-quenched condition<\/td>\n                <td>59-61 HRC<\/td>\n                <td>Maximum hardness before tempering.<\/td>\n              <\/tr>\n              <tr>\n                <td>General working condition<\/td>\n                <td>54-58 HRC<\/td>\n                <td>Common range after hardening and tempering.<\/td>\n              <\/tr>\n              <tr>\n                <td>Balanced shock-resisting range<\/td>\n                <td>56-58 HRC<\/td>\n                <td>Practical range for many punches, dies, and impact tools.<\/td>\n              <\/tr>\n              <tr>\n                <td>Heavy-impact tools<\/td>\n                <td>50-54 HRC<\/td>\n                <td>Better toughness where cracking risk is high.<\/td>\n              <\/tr>\n              <tr>\n                <td>Higher edge-strength applications<\/td>\n                <td>58-60 HRC<\/td>\n                <td>Higher hardness, but lower shock safety margin.<\/td>\n              <\/tr>\n              <tr>\n                <td>High-temperature tempered condition<\/td>\n                <td>about 45-46 HRC near 1100-1150 F<\/td>\n                <td>Used when high tempering temperature is required.<\/td>\n              <\/tr>\n            <\/tbody>\n          <\/table>\n        <\/div>\n\n        <div class=\"aobo-note\">\n          These values are useful for material selection, purchase discussion, and heat-treatment planning. Final hardness should still be confirmed by actual hardness testing after heat treatment.\n        <\/div>\n      <\/div>\n    <\/section>\n\n    <section class=\"aobo-section\">\n      <div class=\"aobo-section-head\">\n        <h2>Annealed S7 Hardness<\/h2>\n      <\/div>\n      <div class=\"aobo-section-body\">\n        <p>\n          S7 tool steel is normally supplied in the annealed condition because the material must be machinable before final hardening.\n        <\/p>\n        <p>\n          In this condition, Brinell hardness is more useful than Rockwell C hardness. The common annealed range is 187-223 HB, while some supplier references use 200-225 HBW or an upper reference of about 230 HB.\n        <\/p>\n        <p>\n          Annealed S7 should not be judged as too soft simply because it is below its final working hardness. This is the correct condition for cutting, milling, drilling, grinding, and preparing the tool before heat treatment.\n        <\/p>\n      <\/div>\n    <\/section>\n\n    <section class=\"aobo-section\">\n      <div class=\"aobo-section-head\">\n        <h2>S7 Hardness After Hardening and Tempering<\/h2>\n      <\/div>\n      <div class=\"aobo-section-body\">\n        <p>\n          After hardening, S7 can reach about 59-61 HRC in the as-quenched condition. This is a heat-treatment stage, not the normal service condition.\n        <\/p>\n        <p>\n          The steel must be tempered to reduce internal stress and adjust the final balance between hardness and toughness. For most practical tooling applications, S7 is used around 54-58 HRC.\n        <\/p>\n        <p>\n          The final hardness depends on austenitizing temperature, quenching method, tempering temperature, section size, and service requirement. A hardness value on paper should always be matched to the tool&#8217;s actual working conditions.\n        <\/p>\n      <\/div>\n    <\/section>\n\n    <section class=\"aobo-section\">\n      <div class=\"aobo-section-head\">\n        <h2>How to Choose S7 Working Hardness<\/h2>\n      <\/div>\n      <div class=\"aobo-section-body\">\n        <p>\n          For S7 tool steel, the highest HRC value is not always the best target.\n        <\/p>\n        <p>\n          A tool hardened close to 60 HRC may have higher edge strength, but it can lose part of the impact resistance that makes S7 useful. For repeated shock loading, a slightly lower hardness often gives better service life.\n        <\/p>\n        <p>\n          If the tool chips, cracks, or breaks under impact, a lower hardness range is usually safer. If the tool deforms or wears too quickly, higher hardness may help, but a more wear-resistant grade may also be a better choice.\n        <\/p>\n\n        <div class=\"aobo-logic-grid\">\n          <div class=\"aobo-logic-card\">\n            <strong>Choose Lower<\/strong>\n            <p>When cracking, chipping, or impact breakage is the main service risk, move toward a tougher and slightly softer range.<\/p>\n          <\/div>\n          <div class=\"aobo-logic-card\">\n            <strong>Choose Center<\/strong>\n            <p>For many general punches, dies, and cold-forming tools, 56-58 HRC is the practical balance point.<\/p>\n          <\/div>\n          <div class=\"aobo-logic-card\">\n            <strong>Choose Higher Carefully<\/strong>\n            <p>When edge strength or deformation control matters more, higher hardness can help, but the shock margin becomes smaller.<\/p>\n          <\/div>\n        <\/div>\n      <\/div>\n    <\/section>\n\n    <section class=\"aobo-section\">\n      <div class=\"aobo-section-head\">\n        <h2>S7 Hardness by Application<\/h2>\n      <\/div>\n      <div class=\"aobo-section-body\">\n        <p>\n          S7 hardness should be selected according to the tool&#8217;s failure risk. Tools exposed to heavy impact often require greater toughness. Tools exposed to wear, cutting, or deformation may need higher hardness.\n        <\/p>\n\n        <div class=\"aobo-table-wrap\">\n          <table class=\"aobo-table\">\n            <thead>\n              <tr>\n                <th>Solicitud<\/th>\n                <th>Typical S7 Hardness Range<\/th>\n                <th>L\u00f3gica de selecci\u00f3n<\/th>\n              <\/tr>\n            <\/thead>\n            <tbody>\n              <tr>\n                <td>golpes generales<\/td>\n                <td>56-58 HRC<\/td>\n                <td>Balanced edge strength and shock resistance.<\/td>\n              <\/tr>\n              <tr>\n                <td>troqueles de troquelado<\/td>\n                <td>56-58 HRC<\/td>\n                <td>Suitable for impact-loaded cold-work tooling.<\/td>\n              <\/tr>\n              <tr>\n                <td>cuchillas de corte<\/td>\n                <td>54-56 HRC<\/td>\n                <td>Lower hardness helps reduce chipping risk.<\/td>\n              <\/tr>\n              <tr>\n                <td>Cold-forming tools<\/td>\n                <td>56-58 HRC<\/td>\n                <td>Combines strength, toughness, and moderate wear resistance.<\/td>\n              <\/tr>\n              <tr>\n                <td>Heavy-impact tools<\/td>\n                <td>50-54 HRC<\/td>\n                <td>Better safety against cracking.<\/td>\n              <\/tr>\n              <tr>\n                <td>Chisels and battering tools<\/td>\n                <td>54-58 HRC<\/td>\n                <td>Maintains impact absorption.<\/td>\n              <\/tr>\n              <tr>\n                <td>Cold swaging dies<\/td>\n                <td>56-60 HRC<\/td>\n                <td>Higher compressive strength may be needed.<\/td>\n              <\/tr>\n              <tr>\n                <td>Cutting tools under shock load<\/td>\n                <td>55-60 HRC<\/td>\n                <td>Used when both edge strength and toughness are required.<\/td>\n              <\/tr>\n              <tr>\n                <td>Medium or large molds<\/td>\n                <td>53-56 HRC<\/td>\n                <td>Lower hardness may improve toughness and dimensional safety.<\/td>\n              <\/tr>\n              <tr>\n                <td>Moderate hot-work applications<\/td>\n                <td>about 45-57 HRC<\/td>\n                <td>Final hardness depends on tempering temperature and service heat.<\/td>\n              <\/tr>\n            <\/tbody>\n          <\/table>\n        <\/div>\n\n        <div class=\"aobo-note\">\n          For most S7 tooling, 56-58 HRC is the practical center. Lower hardness improves shock safety. Higher hardness improves edge strength, but it also reduces the safety margin against cracking.\n        <\/div>\n      <\/div>\n    <\/section>\n\n    <section class=\"aobo-section\">\n      <div class=\"aobo-section-head\">\n        <h2>S7 HRC to HB Conversion<\/h2>\n      <\/div>\n      <div class=\"aobo-section-body\">\n        <p>\n          Annealed S7 is usually specified in Brinell hardness. Hardened and tempered S7 is usually specified in Rockwell C hardness.\n        <\/p>\n        <p>\n          The table below gives approximate HRC-to-HB references for hardened steel.\n        <\/p>\n\n        <div class=\"aobo-table-wrap\">\n          <table class=\"aobo-table\">\n            <thead>\n              <tr>\n                <th>Rockwell C Hardness<\/th>\n                <th>Approximate Brinell Hardness<\/th>\n              <\/tr>\n            <\/thead>\n            <tbody>\n              <tr>\n                <td>60 HRC<\/td>\n                <td>about 654 HB<\/td>\n              <\/tr>\n              <tr>\n                <td>58 HRC<\/td>\n                <td>about 615 HB<\/td>\n              <\/tr>\n              <tr>\n                <td>56 HRC<\/td>\n                <td>about 577 HB<\/td>\n              <\/tr>\n              <tr>\n                <td>54 HRC<\/td>\n                <td>about 543 HB<\/td>\n              <\/tr>\n              <tr>\n                <td>52 HRC<\/td>\n                <td>about 500-512 HB<\/td>\n              <\/tr>\n              <tr>\n                <td>50 HRC<\/td>\n                <td>about 475-481 HB<\/td>\n              <\/tr>\n            <\/tbody>\n          <\/table>\n        <\/div>\n\n        <div class=\"aobo-note\">\n          These values are approximate conversions only. They should not replace actual hardness testing when a purchase order, drawing, or inspection report requires a specific hardness scale.\n        <\/div>\n        <p>\n          For annealed S7, with hardness around 187-223 HB, Rockwell C conversion is less reliable and less useful. In this soft condition, HB or HBW should be used as the main hardness reference.\n        <\/p>\n      <\/div>\n    <\/section>\n\n    <section class=\"aobo-cta\">\n      <div class=\"aobo-cta-inner\">\n        <div>\n          <h2>Need S7 Tool Steel in Annealed Supply Condition?<\/h2>\n          <p>\n            Share your required size, quantity, delivery condition, and destination. Aobo Steel can support bulk S7 tool steel supply for distributors, stockists, and industrial tool-making projects.\n          <\/p>\n        <\/div>\n\n        <div class=\"aobo-cta-actions\">\n          <a class=\"aobo-btn aobo-btn-primary popmake-16052\" href=\"javascript:void(0);\">Open Contact Form<\/a>\n          <a class=\"aobo-btn aobo-btn-secondary\" href=\"https:\/\/aobosteel.com\/es\/s7-tool-steel\/\">View S7 Tool Steel Page<\/a>\n        <\/div>\n      <\/div>\n    <\/section>\n\n  <\/div>\n<\/section>\n\n\n\n<ul class=\"wp-block-yoast-seo-related-links yoast-seo-related-links\">\n<li><a href=\"https:\/\/aobosteel.com\/es\/h13-steel-heat-treatment\/\">Gu\u00eda de tratamiento t\u00e9rmico H13 | Aobo Steel<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/es\/h13-steel-hardness\/\">Dureza del acero H13: Rango HRC, tabla de revenido y aplicaciones.<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/es\/420-stainless-steel-heat-treatment\/\">Gu\u00eda de tratamiento t\u00e9rmico del acero 420 | Endurecimiento, temple y revenido<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/es\/s7-tool-steel-heat-treatment\/\">Gu\u00eda de tratamiento t\u00e9rmico del acero para herramientas S7: temperatura, dureza y proceso.<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/es\/h13-vs-h11-tool-steel\/\">H13 vs H11 Tool Steel: Heat Wear or Impact Cracking?<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>Aobo Steel S7 Hardness Reference S7 Tool Steel Rockwell Hardness Chart S7 tool steel is usually supplied in the annealed condition at about 187-223 HB. After hardening and tempering, the common working hardness is about 54-58 HRC. For many shock-loaded tools such as punches, chisels, shear blades, and cold-forming tools, 56-58 HRC is often the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":15197,"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":"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-15195","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.3 (Yoast SEO v28.3) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>S7 Tool Steel Rockwell Hardness Chart | HRC, HB &amp; 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After hardening and tempering, the common working hardness is about 54-58 HRC. 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