{"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\/pt\/s7-tool-steel-rockwell-hardness-chart\/","title":{"rendered":"Tabela de dureza Rockwell do a\u00e7o ferramenta S7 | HRC, HB e faixa de trabalho"},"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\">Refer\u00eancia de dureza do a\u00e7o Aobo S7<\/span>\n      <h1>Tabela de dureza Rockwell do a\u00e7o para ferramentas S7<\/h1>\n      <p>\n        O a\u00e7o ferramenta S7 \u00e9 geralmente fornecido no estado recozido com dureza de aproximadamente 187-223 HB. Ap\u00f3s t\u00eampera e revenido, a dureza de trabalho comum \u00e9 de cerca de 54-58 HRC. Para muitas ferramentas sujeitas a impactos, como pun\u00e7\u00f5es, cinz\u00e9is, l\u00e2minas de corte e ferramentas de conforma\u00e7\u00e3o a frio, 56-58 HRC costuma ser o valor ideal, pois mant\u00e9m a resist\u00eancia \u00fatil do fio de corte, preservando a principal vantagem do S7: a resist\u00eancia ao impacto.\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=\"Barras de a\u00e7o ferramenta S7 fornecidas pela Aobo Steel.\" loading=\"lazy\">\n      <\/div>\n      <div class=\"aobo-supply-content\">\n        <p>A Aobo Steel fornece a\u00e7o ferramenta S7 recozido, pronto para usinagem e tratamento t\u00e9rmico interno. Consulte os tamanhos e o estoque dispon\u00edveis ou envie sua solicita\u00e7\u00e3o para um or\u00e7amento.<\/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\/pt\/s7-tool-steel\/\">Veja os detalhes de fornecimento do S7<\/a>\n        <\/div>\n      <\/div>\n    <\/section>\n\n    <section class=\"aobo-section\">\n      <div class=\"aobo-section-head\">\n        <h2>Tabela de dureza do a\u00e7o ferramenta S7<\/h2>\n      <\/div>\n      <div class=\"aobo-section-body\">\n        <p>\n          A tabela abaixo resume os valores t\u00edpicos de dureza do a\u00e7o ferramenta S7 nas condi\u00e7\u00f5es recozida, temperada, revenida e de acordo com a aplica\u00e7\u00e3o.\n        <\/p>\n\n        <div class=\"aobo-table-wrap\">\n          <table class=\"aobo-table\">\n            <thead>\n              <tr>\n                <th>Condi\u00e7\u00e3o S7<\/th>\n                <th>Dureza t\u00edpica<\/th>\n                <th>Significado pr\u00e1tico<\/th>\n              <\/tr>\n            <\/thead>\n            <tbody>\n              <tr>\n                <td>Condi\u00e7\u00e3o de recozimento<\/td>\n                <td>187-223 HB<\/td>\n                <td>Condi\u00e7\u00f5es normais de fornecimento para usinagem.<\/td>\n              <\/tr>\n              <tr>\n                <td>Refer\u00eancia superior recozida<\/td>\n                <td>aproximadamente 230 HB no m\u00e1ximo<\/td>\n                <td>Limite superior comum em alguns dados de fornecedores.<\/td>\n              <\/tr>\n              <tr>\n                <td>condi\u00e7\u00e3o ap\u00f3s t\u00eampera<\/td>\n                <td>59-61 HRC<\/td>\n                <td>Dureza m\u00e1xima antes do revenimento.<\/td>\n              <\/tr>\n              <tr>\n                <td>Condi\u00e7\u00f5es gerais de funcionamento<\/td>\n                <td>54-58 HRC<\/td>\n                <td>Faixa de temperatura comum ap\u00f3s t\u00eampera e revenido.<\/td>\n              <\/tr>\n              <tr>\n                <td>Faixa de resist\u00eancia a choques equilibrada<\/td>\n                <td>56-58 HRC<\/td>\n                <td>Gama pr\u00e1tica para muitos pun\u00e7\u00f5es, matrizes e ferramentas de impacto.<\/td>\n              <\/tr>\n              <tr>\n                <td>Ferramentas de alto impacto<\/td>\n                <td>50-54 HRC<\/td>\n                <td>Maior resist\u00eancia onde o risco de fissuras \u00e9 alto.<\/td>\n              <\/tr>\n              <tr>\n                <td>Aplica\u00e7\u00f5es que exigem maior resist\u00eancia nas bordas<\/td>\n                <td>58-60 HRC<\/td>\n                <td>Maior dureza, mas menor margem de seguran\u00e7a contra impactos.<\/td>\n              <\/tr>\n              <tr>\n                <td>Condi\u00e7\u00e3o temperada em alta temperatura<\/td>\n                <td>cerca de 45-46 HRC pr\u00f3ximo a 1100-1150 F<\/td>\n                <td>Utilizado quando se requer uma temperatura de t\u00eampera elevada.<\/td>\n              <\/tr>\n            <\/tbody>\n          <\/table>\n        <\/div>\n\n        <div class=\"aobo-note\">\n          Esses valores s\u00e3o \u00fateis para a sele\u00e7\u00e3o de materiais, discuss\u00e3o de compras e planejamento de tratamento t\u00e9rmico. A dureza final ainda deve ser confirmada por meio de testes de dureza reais ap\u00f3s o tratamento t\u00e9rmico.\n        <\/div>\n      <\/div>\n    <\/section>\n\n    <section class=\"aobo-section\">\n      <div class=\"aobo-section-head\">\n        <h2>Dureza S7 recozida<\/h2>\n      <\/div>\n      <div class=\"aobo-section-body\">\n        <p>\n          O a\u00e7o ferramenta S7 \u00e9 normalmente fornecido na condi\u00e7\u00e3o recozida, pois o material deve ser usin\u00e1vel antes do endurecimento final.\n        <\/p>\n        <p>\n          Nessa condi\u00e7\u00e3o, a dureza Brinell \u00e9 mais \u00fatil do que a dureza Rockwell C. A faixa comum para materiais recozidos \u00e9 de 187 a 223 HB, enquanto algumas refer\u00eancias de fornecedores usam 200 a 225 HBW ou um valor m\u00e1ximo de refer\u00eancia de cerca de 230 HB.\n        <\/p>\n        <p>\n          O a\u00e7o S7 recozido n\u00e3o deve ser considerado muito macio simplesmente por estar abaixo de sua dureza de trabalho final. Esta \u00e9 a condi\u00e7\u00e3o correta para corte, fresagem, fura\u00e7\u00e3o, retifica\u00e7\u00e3o e prepara\u00e7\u00e3o da ferramenta antes do tratamento t\u00e9rmico.\n        <\/p>\n      <\/div>\n    <\/section>\n\n    <section class=\"aobo-section\">\n      <div class=\"aobo-section-head\">\n        <h2>Dureza S7 ap\u00f3s t\u00eampera e revenido<\/h2>\n      <\/div>\n      <div class=\"aobo-section-body\">\n        <p>\n          Ap\u00f3s o endurecimento, o a\u00e7o S7 pode atingir cerca de 59-61 HRC no estado bruto de t\u00eampera. Esta \u00e9 uma etapa de tratamento t\u00e9rmico, n\u00e3o a condi\u00e7\u00e3o normal de servi\u00e7o.\n        <\/p>\n        <p>\n          O a\u00e7o deve ser temperado para reduzir a tens\u00e3o interna e ajustar o equil\u00edbrio final entre dureza e tenacidade. Para a maioria das aplica\u00e7\u00f5es pr\u00e1ticas em ferramentas, utiliza-se o a\u00e7o S7 com dureza entre 54 e 58 HRC.\n        <\/p>\n        <p>\n          A dureza final depende da temperatura de austenitiza\u00e7\u00e3o, do m\u00e9todo de t\u00eampera, da temperatura de revenido, da dimens\u00e3o da se\u00e7\u00e3o transversal e dos requisitos de servi\u00e7o. O valor de dureza indicado no papel deve sempre ser comparado com as condi\u00e7\u00f5es reais de trabalho da ferramenta.\n        <\/p>\n      <\/div>\n    <\/section>\n\n    <section class=\"aobo-section\">\n      <div class=\"aobo-section-head\">\n        <h2>Como escolher a dureza de trabalho S7<\/h2>\n      <\/div>\n      <div class=\"aobo-section-body\">\n        <p>\n          Para o a\u00e7o ferramenta S7, o valor HRC mais alto nem sempre \u00e9 o melhor objetivo.\n        <\/p>\n        <p>\n          Uma ferramenta com dureza pr\u00f3xima a 60 HRC pode ter maior resist\u00eancia de corte, mas pode perder parte da resist\u00eancia ao impacto que torna o a\u00e7o S7 \u00fatil. Para cargas de choque repetidas, uma dureza ligeiramente menor geralmente proporciona maior vida \u00fatil.\n        <\/p>\n        <p>\n          Se a ferramenta lascar, rachar ou quebrar com o impacto, uma dureza menor geralmente \u00e9 mais segura. Se a ferramenta deformar ou desgastar muito rapidamente, uma dureza maior pode ajudar, mas uma classe de dureza mais resistente ao desgaste tamb\u00e9m pode ser uma escolha melhor.\n        <\/p>\n\n        <div class=\"aobo-logic-grid\">\n          <div class=\"aobo-logic-card\">\n            <strong>Escolha a op\u00e7\u00e3o mais baixa<\/strong>\n            <p>Quando rachaduras, lascas ou quebras por impacto representam o principal risco de uso, opte por uma gama de materiais mais resistentes e ligeiramente mais flex\u00edveis.<\/p>\n          <\/div>\n          <div class=\"aobo-logic-card\">\n            <strong>Selecione o centro<\/strong>\n            <p>Para muitas pun\u00e7\u00f5es, matrizes e ferramentas de conforma\u00e7\u00e3o a frio em geral, 56-58 HRC \u00e9 o ponto de equil\u00edbrio pr\u00e1tico.<\/p>\n          <\/div>\n          <div class=\"aobo-logic-card\">\n            <strong>Escolha com cuidado, mesmo que seja mais elevado.<\/strong>\n            <p>Quando a resist\u00eancia da aresta de corte ou o controle da deforma\u00e7\u00e3o s\u00e3o mais importantes, uma dureza maior pode ajudar, mas a margem de absor\u00e7\u00e3o de impactos diminui.<\/p>\n          <\/div>\n        <\/div>\n      <\/div>\n    <\/section>\n\n    <section class=\"aobo-section\">\n      <div class=\"aobo-section-head\">\n        <h2>Dureza S7 por aplica\u00e7\u00e3o<\/h2>\n      <\/div>\n      <div class=\"aobo-section-body\">\n        <p>\n          A dureza S7 deve ser selecionada de acordo com o risco de falha da ferramenta. Ferramentas expostas a impactos fortes geralmente exigem maior tenacidade. Ferramentas expostas a desgaste, corte ou deforma\u00e7\u00e3o podem necessitar de maior dureza.\n        <\/p>\n\n        <div class=\"aobo-table-wrap\">\n          <table class=\"aobo-table\">\n            <thead>\n              <tr>\n                <th>Aplicativo<\/th>\n                <th>Faixa de dureza t\u00edpica S7<\/th>\n                <th>L\u00f3gica de Sele\u00e7\u00e3o<\/th>\n              <\/tr>\n            <\/thead>\n            <tbody>\n              <tr>\n                <td>socos gerais<\/td>\n                <td>56-58 HRC<\/td>\n                <td>Equil\u00edbrio entre resist\u00eancia das bordas e resist\u00eancia a impactos.<\/td>\n              <\/tr>\n              <tr>\n                <td>Matrizes de corte<\/td>\n                <td>56-58 HRC<\/td>\n                <td>Adequado para ferramentas de trabalho a frio sujeitas a impacto.<\/td>\n              <\/tr>\n              <tr>\n                <td>L\u00e2minas de tesoura<\/td>\n                <td>54-56 HRC<\/td>\n                <td>Uma dureza menor ajuda a reduzir o risco de lascamento.<\/td>\n              <\/tr>\n              <tr>\n                <td>Ferramentas de conforma\u00e7\u00e3o a frio<\/td>\n                <td>56-58 HRC<\/td>\n                <td>Combina resist\u00eancia, tenacidade e uma resist\u00eancia moderada ao desgaste.<\/td>\n              <\/tr>\n              <tr>\n                <td>Ferramentas de alto impacto<\/td>\n                <td>50-54 HRC<\/td>\n                <td>Maior seguran\u00e7a contra rachaduras.<\/td>\n              <\/tr>\n              <tr>\n                <td>Cinz\u00e9is e ferramentas de martelar<\/td>\n                <td>54-58 HRC<\/td>\n                <td>Mant\u00e9m a capacidade de absor\u00e7\u00e3o de impacto.<\/td>\n              <\/tr>\n              <tr>\n                <td>Matrizes de estampagem a frio<\/td>\n                <td>56-60 HRC<\/td>\n                <td>Pode ser necess\u00e1ria uma maior resist\u00eancia \u00e0 compress\u00e3o.<\/td>\n              <\/tr>\n              <tr>\n                <td>Ferramentas de corte sob carga de choque<\/td>\n                <td>55-60 HRC<\/td>\n                <td>Utilizado quando se requerem tanto resist\u00eancia nas bordas quanto tenacidade.<\/td>\n              <\/tr>\n              <tr>\n                <td>moldes m\u00e9dios ou grandes<\/td>\n                <td>53-56 HRC<\/td>\n                <td>Uma dureza menor pode melhorar a tenacidade e a seguran\u00e7a dimensional.<\/td>\n              <\/tr>\n              <tr>\n                <td>Aplica\u00e7\u00f5es moderadas de trabalho a quente<\/td>\n                <td>cerca de 45-57 HRC<\/td>\n                <td>A dureza final depende da temperatura de revenimento e do calor de servi\u00e7o.<\/td>\n              <\/tr>\n            <\/tbody>\n          <\/table>\n        <\/div>\n\n        <div class=\"aobo-note\">\n          Para a maioria das ferramentas S7, 56-58 HRC \u00e9 o valor ideal. Uma dureza menor melhora a resist\u00eancia ao impacto. Uma dureza maior melhora a resist\u00eancia da aresta de corte, mas tamb\u00e9m reduz a margem de seguran\u00e7a contra trincas.\n        <\/div>\n      <\/div>\n    <\/section>\n\n    <section class=\"aobo-section\">\n      <div class=\"aobo-section-head\">\n        <h2>Convers\u00e3o de S7 HRC para HB<\/h2>\n      <\/div>\n      <div class=\"aobo-section-body\">\n        <p>\n          O a\u00e7o S7 recozido \u00e9 geralmente especificado em dureza Brinell. O a\u00e7o S7 temperado e revenido \u00e9 geralmente especificado em dureza Rockwell C.\n        <\/p>\n        <p>\n          A tabela abaixo fornece refer\u00eancias aproximadas de HRC para HB para a\u00e7o temperado.\n        <\/p>\n\n        <div class=\"aobo-table-wrap\">\n          <table class=\"aobo-table\">\n            <thead>\n              <tr>\n                <th>Dureza Rockwell C<\/th>\n                <th>Dureza Brinell aproximada<\/th>\n              <\/tr>\n            <\/thead>\n            <tbody>\n              <tr>\n                <td>60 HRC<\/td>\n                <td>cerca de 654 HB<\/td>\n              <\/tr>\n              <tr>\n                <td>58 HRC<\/td>\n                <td>cerca de 615 HB<\/td>\n              <\/tr>\n              <tr>\n                <td>56 HRC<\/td>\n                <td>cerca de 577 HB<\/td>\n              <\/tr>\n              <tr>\n                <td>54 HRC<\/td>\n                <td>cerca de 543 HB<\/td>\n              <\/tr>\n              <tr>\n                <td>52 HRC<\/td>\n                <td>cerca de 500-512 HB<\/td>\n              <\/tr>\n              <tr>\n                <td>50 HRC<\/td>\n                <td>cerca de 475-481 HB<\/td>\n              <\/tr>\n            <\/tbody>\n          <\/table>\n        <\/div>\n\n        <div class=\"aobo-note\">\n          Esses valores s\u00e3o convers\u00f5es aproximadas apenas. Eles n\u00e3o devem substituir os testes de dureza reais quando um pedido de compra, desenho ou relat\u00f3rio de inspe\u00e7\u00e3o exigir uma escala de dureza espec\u00edfica.\n        <\/div>\n        <p>\n          Para o a\u00e7o S7 recozido, com dureza em torno de 187-223 HB, a convers\u00e3o para Rockwell C \u00e9 menos confi\u00e1vel e menos \u00fatil. Nessa condi\u00e7\u00e3o de a\u00e7o macio, a dureza HB ou HBW deve ser usada como principal refer\u00eancia.\n        <\/p>\n      <\/div>\n    <\/section>\n\n    <section class=\"aobo-cta\">\n      <div class=\"aobo-cta-inner\">\n        <div>\n          <h2>Precisa de a\u00e7o ferramenta S7 em condi\u00e7\u00e3o de fornecimento recozido?<\/h2>\n          <p>\n            Compartilhe o tamanho, a quantidade, as condi\u00e7\u00f5es de entrega e o destino desejados. A Aobo Steel pode fornecer a\u00e7o ferramenta S7 em grandes quantidades para distribuidores, armazenistas e projetos de fabrica\u00e7\u00e3o de ferramentas industriais.\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);\">Abrir formul\u00e1rio de contato<\/a>\n          <a class=\"aobo-btn aobo-btn-secondary\" href=\"https:\/\/aobosteel.com\/pt\/s7-tool-steel\/\">Veja a p\u00e1gina do a\u00e7o ferramenta S7<\/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\/pt\/h13-steel-heat-treatment\/\">Guia de Tratamento T\u00e9rmico H13 | Aobo Steel<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/h13-steel-hardness\/\">Dureza do a\u00e7o H13: Faixa HRC, tabela de revenimento e aplica\u00e7\u00f5es<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/420-stainless-steel-heat-treatment\/\">Guia de Tratamento T\u00e9rmico do A\u00e7o 420 | Endurecimento, T\u00eampera e Revenimento<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/s7-tool-steel-heat-treatment\/\">Guia de tratamento t\u00e9rmico do a\u00e7o ferramenta S7: temperatura, dureza e processo<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/h13-vs-h11-tool-steel\/\">A\u00e7o ferramenta H13 vs H11: desgaste t\u00e9rmico ou fissura\u00e7\u00e3o por impacto?<\/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 v28.0 (Yoast SEO v28.0) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>S7 Tool Steel Rockwell Hardness Chart | HRC, HB &amp; 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