{"id":12240,"date":"2026-01-14T13:32:41","date_gmt":"2026-01-14T05:32:41","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=12240"},"modified":"2026-06-25T15:33:43","modified_gmt":"2026-06-25T07:33:43","slug":"s1-tool-steel-heat-treatment-guide","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/pt\/s1-tool-steel-heat-treatment-guide\/","title":{"rendered":"Guia de Tratamento T\u00e9rmico do A\u00e7o Ferramenta S1"},"content":{"rendered":"<section class=\"aobo-s1-heat-treatment-page\">\n  <style>\n    .aobo-s1-heat-treatment-page {\n      --aobo-blue: #0c56d0;\n      --aobo-blue-dark: #073b8e;\n      --aobo-blue-soft: #eaf2ff;\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      --aobo-page-width: 1180px;\n      font-family: inherit;\n      color: var(--aobo-text);\n      line-height: 1.7;\n      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class=\"aobo-wrap\">\n    <header class=\"aobo-hero\">\n      <h1>Guia de Tratamento T\u00e9rmico do A\u00e7o Ferramenta S1<\/h1>\n      <p>S1 tool steel (1.2550, SKS41) is hardened by preheating to about 650\u00b0C (1200\u00b0F), austenitizing at 900\u00b0C to 955\u00b0C (1650\u00b0F to 1750\u00b0F), oil quenching to 50\u00b0C to 70\u00b0C, and tempering immediately while the part is still warm. As-quenched hardness runs about 57 to 59 HRC, and a double temper between 205\u00b0C and 315\u00b0C (400\u00b0F and 600\u00b0F) delivers the high toughness and shock resistance S1 is valued for. Rough-machined or cold-worked parts should be stress relieved before hardening.<\/p>\n    <\/header>\n\n    <section class=\"aobo-supply-block\" aria-label=\"S1 tool steel inquiry and product details\">\n      <div class=\"aobo-supply-image\">\n        <img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/09\/S1-tool-steel.avif\" alt=\"A\u00e7o ferramenta S1 fornecido pela Aobo Steel\" loading=\"lazy\">\n      <\/div>\n      <div class=\"aobo-supply-content\">\n        <p>Aobo Steel supplies S1 tool steel (1.2550, SKS41) for shock-resisting applications. Send your required size, quantity, condition, and application for a quote.<\/p>\n        <div class=\"aobo-supply-actions\">\n          <a class=\"aobo-btn popmake-16052\" href=\"javascript:void(0);\">Enviar consulta<\/a>\n          <a class=\"aobo-btn aobo-btn-detail\" href=\"https:\/\/aobosteel.com\/pt\/s1-tool-steel\/\">View S1 Tool Steel Details<\/a>\n        <\/div>\n      <\/div>\n    <\/section>\n\n    <main class=\"aobo-article\">\n      <h2>Al\u00edvio do estresse<\/h2>\n      <p>Stress relief prepares S1 components after rough machining or cold working, reducing the risk of distortion and cracking during hardening. Internal stresses from machining, if left in place, can cause severe microstructural or dimensional distortion once the part reaches hardening temperature.<\/p>\n      <ul class=\"aobo-list\">\n        <li><strong>Heating temperature:<\/strong> Heat uniformly to 650\u00b0C to 675\u00b0C (1200\u00b0F to 1250\u00b0F).<\/li>\n        <li><strong>Soak time:<\/strong> 1 hour per 25 mm (1 inch) of thickness, with a minimum of 1 hour.<\/li>\n        <li><strong>Resfriamento:<\/strong> Slow air cooling.<\/li>\n      <\/ul>\n\n      <h2>Pr\u00e9-aquecimento<\/h2>\n      <p>To prevent thermal shock and excessive deformation, cold S1 workpieces must never be placed directly into a furnace already at austenitizing temperature.<\/p>\n      <ul class=\"aobo-list\">\n        <li><strong>Heating temperature:<\/strong> Slowly raise the temperature to about 650\u00b0C (1200\u00b0F).<\/li>\n        <li><strong>Soak:<\/strong> Hold until the cross-section is uniformly heated.<\/li>\n      <\/ul>\n      <p>For parts with complex geometry or large variations in cross-section, preheating is critical. It synchronizes the temperature rise between core and surface during final heating, which lowers thermal stress and prevents cracking.<\/p>\n\n      <h2>Austenitiza\u00e7\u00e3o (endurecimento)<\/h2>\n      <p>Austenitizing is the core hardening step. Heating transforms the structure to austenite and dissolves carbides into the matrix. The austenitizing temperature for S1 must be neither too high nor too low.<\/p>\n      <ul class=\"aobo-list\">\n        <li><strong>Heating temperature:<\/strong> 900\u00b0C to 955\u00b0C (1650\u00b0F to 1750\u00b0F).<\/li>\n        <li><strong>Hold time:<\/strong> 15 to 45 minutes, set by section thickness so the full cross-section through-hardens.<\/li>\n        <li><strong>Atmosfera:<\/strong> Because S1 has only moderate resistance to decarburization, heat in a controlled neutral atmosphere, vacuum, or neutral salt bath to prevent surface oxidation and carbon loss.<\/li>\n      <\/ul>\n\n      <h2>Resfriamento<\/h2>\n      <p>S1 is an oil-hardening steel. Water quenching is occasionally used for large or simple sections, but oil quenching is preferred for the best toughness and the lowest risk of cracking.<\/p>\n      <ul class=\"aobo-list\">\n        <li><strong>Quenching medium:<\/strong> Preheated, circulating quenching oil.<\/li>\n        <li><strong>Procedimento:<\/strong> Quench until the workpiece reaches 50\u00b0C to 70\u00b0C (120\u00b0F to 160\u00b0F), at which point it is still warm.<\/li>\n      <\/ul>\n      <p>Never let the part cool to room temperature before tempering. The as-quenched structure carries high internal stress, and delayed tempering leaves S1 highly prone to spontaneous brittle fracture.<\/p>\n\n      <figure class=\"aobo-figure\">\n        <img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2026\/01\/S1-tool-steel-Isothermal-Transformation-Diagram.avif\" alt=\"S1 tool steel isothermal transformation diagram\" loading=\"lazy\">\n        <figcaption>S1 isothermal transformation diagram for a grade with C 0.50%, Mn 0.25%, Si 0.75%, Cr 1.25%, V 0.20%, W 2.50%, austenitized at 925\u00b0C (1695\u00b0F). Source: Uddeholm.<\/figcaption>\n      <\/figure>\n\n      <h2>T\u00eampera<\/h2>\n      <p>Temper immediately after quenching to restore toughness and ductility. Tempering converts the as-quenched structure to tempered martensite, and the temperature is set by the hardness required.<\/p>\n      <ul class=\"aobo-list\">\n        <li><strong>Soak time:<\/strong> At least 2 hours per 25 mm (1 inch) of section thickness.<\/li>\n        <li><strong>Secondary tempering:<\/strong> A second temper is recommended to remove unstable retained austenite, improve yield strength and impact properties, and reduce the chance of later distortion or cracking in service.<\/li>\n        <li><strong>Resfriamento:<\/strong> Cool to room temperature between the first and second temper.<\/li>\n      <\/ul>\n      <p>Approximate hardness after oil quenching from 900\u00b0C to 955\u00b0C (1650\u00b0F to 1750\u00b0F):<\/p>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Temperatura de t\u00eampera<\/th><th>Dureza Aproximada (HRC)<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Como temperado<\/td><td>57 to 59<\/td><\/tr>\n            <tr><td>150\u00b0C (300\u00b0F)<\/td><td>56 to 58<\/td><\/tr>\n            <tr><td>205\u00b0C (400\u00b0F)<\/td><td>55 to 57<\/td><\/tr>\n            <tr><td>260\u00b0C (500\u00b0F)<\/td><td>54 to 56<\/td><\/tr>\n            <tr><td>315\u00b0C (600\u00b0F)<\/td><td>52 to 55<\/td><\/tr>\n            <tr><td>370\u00b0C (700\u00b0F)<\/td><td>50 to 53<\/td><\/tr>\n            <tr><td>425\u00b0C (800\u00b0F)<\/td><td>48 to 50<\/td><\/tr>\n            <tr><td>540\u00b0C (1000\u00b0F)<\/td><td>40 to 45<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>For maximum toughness, as in chisels and heavy-duty punches, S1 is usually tempered between 205\u00b0C and 315\u00b0C (400\u00b0F and 600\u00b0F). Higher tempering temperatures can be used for warmer service conditions, but hardness drops significantly.<\/p>\n\n      <h2>Common Heat Treatment Problems and Solutions<\/h2>\n      <section class=\"aobo-problem\">\n        <h3>Quenching cracks<\/h3>\n        <p>Two causes dominate. The first is delayed tempering, where the part sits at room temperature after quenching long enough for stress to exceed the material&#8217;s strength. The second is stress concentration at sharp corners, stamp marks, or rough-machined surfaces. Temper immediately, transferring the part to the tempering furnace while it still holds residual heat near 50\u00b0C to 70\u00b0C. At the design and machining stage, use rounded corners at critical junctions and keep surfaces to a high finish.<\/p>\n      <\/section>\n      <section class=\"aobo-problem\">\n        <h3>Baixa dureza<\/h3>\n        <p>Common causes are surface decarburization from an improper austenitizing atmosphere, insufficient austenitizing temperature or hold time, and weak quenching from oil that is too hot or poorly agitated.<\/p>\n      <\/section>\n      <section class=\"aobo-problem\">\n        <h3>Deforma\u00e7\u00e3o<\/h3>\n        <p>Deformation usually comes from thermal shock caused by heating too quickly, or from residual machining stress released during heating. Preheat to 650\u00b0C before hardening, stress relieve rough-machined parts before quenching, and support long or complex parts to prevent sagging.<\/p>\n      <\/section>\n      <section class=\"aobo-problem\">\n        <h3>Decarburized soft layer<\/h3>\n        <p>A soft surface layer forms when oxygen or moisture in the furnace reacts with surface carbon and carries it off as carbon monoxide or carbon dioxide. A quick check is to draw a file across the surface; if it scratches easily, a soft layer is present. To prevent it, use a vacuum furnace or an inert-gas atmosphere (nitrogen or argon) to exclude oxygen, calibrate salt baths regularly to keep them neutral, and leave enough grinding allowance so the decarburized layer can be removed after heat treatment.<\/p>\n      <\/section>\n\n      <section class=\"aobo-cta\">\n        <div>\n          <h2>Need S1 tool steel for shock-resisting applications?<\/h2>\n          <p>S1 tool steel (1.2550, SKS41) is used where high toughness and shock resistance are required. Send your required size, quantity, condition, and application for a quote.<\/p>\n        <\/div>\n        <a class=\"aobo-btn popmake-16052\" href=\"javascript:void(0);\">Enviar consulta<\/a>\n      <\/section>\n    <\/main>\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\/s1-tool-steel\/\">A\u00e7o para ferramentas S1 | 1.2550<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/h11-tool-steel-heat-treatment\/\">Tabela de tratamento t\u00e9rmico e dureza do a\u00e7o ferramenta H11<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/s7-tool-steel-rockwell-hardness-chart\/\">Tabela de dureza Rockwell do a\u00e7o ferramenta S7 | HRC, HB e faixa de trabalho<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/o1-steel-hardness\/\">Dureza do a\u00e7o O1: Guia HRC para recozimento, t\u00eampera e revenido<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/aobosteel.com\/pt\/h13-steel-heat-treatment\/\">Guia de Tratamento T\u00e9rmico H13 | Aobo Steel<\/a><\/li>\n<\/ul>\n\n\n\n<h2 id=\"h-faq\" class=\"wp-block-heading\">Perguntas frequentes<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1768368514600\"><strong class=\"schema-faq-question\">Qual \u00e9 a temperatura de endurecimento do a\u00e7o ferramenta S1?<\/strong> <p class=\"schema-faq-answer\">A temperatura de aquecimento para austenitiza\u00e7\u00e3o deve estar entre 900 \u00b0C e 955 \u00b0C (1650 \u00b0F e 1750 \u00b0F). Mantenha essa temperatura por 15 a 45 minutos, dependendo da espessura da pe\u00e7a, para garantir o endurecimento completo.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768368531226\"><strong class=\"schema-faq-question\">Como realizar o al\u00edvio de tens\u00f5es em a\u00e7o ferramenta S1?<\/strong> <p class=\"schema-faq-answer\">Aque\u00e7a a pe\u00e7a uniformemente a 650 \u00b0C\u2013675 \u00b0C (1200 \u00b0F\u20131250 \u00b0F). Deixe atingir essa temperatura por 1 hora para cada 25 mm (1 polegada) de espessura (m\u00ednimo de 1 hora) e, em seguida, resfrie lentamente ao ar.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768368533255\"><strong class=\"schema-faq-question\">Qual \u00e9 o m\u00e9todo de t\u00eampera recomendado para o a\u00e7o S1?<\/strong> <p class=\"schema-faq-answer\">O resfriamento em \u00f3leo \u00e9 fortemente recomendado para garantir a tenacidade ideal e minimizar o risco de trincas. Realize o resfriamento em \u00f3leo pr\u00e9-aquecido e em circula\u00e7\u00e3o at\u00e9 que a temperatura da pe\u00e7a caia para 50\u00b0C\u201370\u00b0C (120\u00b0F\u2013160\u00b0F).<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768368534070\"><strong class=\"schema-faq-question\">Como prevenir fissuras de t\u00eampera no a\u00e7o S1?<\/strong> <p class=\"schema-faq-answer\">Ap\u00f3s a t\u00eampera, fa\u00e7a o revenimento da pe\u00e7a imediatamente, enquanto ela ainda estiver morna (50 \u00b0C a 70 \u00b0C); n\u00e3o a deixe esfriar at\u00e9 a temperatura ambiente. Al\u00e9m disso, certifique-se de que os projetos utilizem cantos arredondados em vez de pontos de tens\u00e3o agudos.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768368534896\"><strong class=\"schema-faq-question\">Qual \u00e9 o processo de revenimento do a\u00e7o ferramenta S1?<\/strong> <p class=\"schema-faq-answer\">Revenimento imediato ap\u00f3s a t\u00eampera, com um tempo m\u00ednimo de perman\u00eancia de 2 horas por cada 25 mm (1 polegada) de espessura. Recomenda-se vivamente um revenimento secund\u00e1rio para obter a resist\u00eancia ao escoamento e a resist\u00eancia ao impacto ideais.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768368535752\"><strong class=\"schema-faq-question\">Qual a dureza que o a\u00e7o ferramenta S1 pode atingir?<\/strong> <p class=\"schema-faq-answer\">Ap\u00f3s t\u00eampera em \u00f3leo, o a\u00e7o S1 normalmente atinge uma dureza de 57\u201359 HRC ap\u00f3s a t\u00eampera. O revenido a temperaturas entre 205\u00b0C (400\u00b0F) e 315\u00b0C (600\u00b0F) resulta em uma faixa de dureza de 52\u201357 HRC.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768368604242\"><strong class=\"schema-faq-question\">Por que o pr\u00e9-aquecimento \u00e9 necess\u00e1rio para o a\u00e7o S1?<\/strong> <p class=\"schema-faq-answer\">O pr\u00e9-aquecimento a 650 \u00b0C (1200 \u00b0F) previne o choque t\u00e9rmico e a deforma\u00e7\u00e3o excessiva. Ele garante o aquecimento simult\u00e2neo do n\u00facleo e da superf\u00edcie durante a etapa final, reduzindo a tens\u00e3o t\u00e9rmica e o risco de fissuras em geometrias complexas.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1768368605375\"><strong class=\"schema-faq-question\">Como evitar camadas moles ou descarboneta\u00e7\u00e3o no a\u00e7o S1?<\/strong> <p class=\"schema-faq-answer\">Aque\u00e7a o a\u00e7o em um forno a v\u00e1cuo, banho de sal neutro ou atmosfera neutra controlada para evitar a oxida\u00e7\u00e3o superficial. Caso ocorra descarboneta\u00e7\u00e3o, deixe uma toler\u00e2ncia suficiente para remover a camada afetada por esmerilhamento ap\u00f3s o tratamento t\u00e9rmico.<\/p> <\/div> <\/div>","protected":false},"excerpt":{"rendered":"<p>S1 Tool Steel Heat Treatment Guide S1 tool steel (1.2550, SKS41) is hardened by preheating to about 650\u00b0C (1200\u00b0F), austenitizing at 900\u00b0C to 955\u00b0C (1650\u00b0F to 1750\u00b0F), oil quenching to 50\u00b0C to 70\u00b0C, and tempering immediately while the part is still warm. As-quenched hardness runs about 57 to 59 HRC, and a double temper between [&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-12240","page","type-page","status-publish","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>S1 Tool Steel Heat Treatment\u00a0Guide - AoboSteel<\/title>\n<meta name=\"description\" content=\"Master the S1 tool steel heat treatment process. 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Hold this temperature for 15 to 45 minutes, depending on the workpiece thickness, to ensure complete through-hardening.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/s1-tool-steel-heat-treatment-guide\\\/#faq-question-1768368531226\",\"position\":2,\"url\":\"https:\\\/\\\/aobosteel.com\\\/s1-tool-steel-heat-treatment-guide\\\/#faq-question-1768368531226\",\"name\":\"How to perform stress relief on S1 tool steel?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Heat the workpiece uniformly to 650\u00b0C\u2013675\u00b0C (1200\u00b0F\u20131250\u00b0F). Allow a soak time of 1 hour per 25 mm (1 inch) of thickness (minimum 1 hour), then cool slowly in air.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/s1-tool-steel-heat-treatment-guide\\\/#faq-question-1768368533255\",\"position\":3,\"url\":\"https:\\\/\\\/aobosteel.com\\\/s1-tool-steel-heat-treatment-guide\\\/#faq-question-1768368533255\",\"name\":\"What is the recommended quenching method for S1 steel?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Oil quenching is strongly recommended to ensure optimal toughness and minimize cracking. Quench in preheated, circulating oil until the workpiece temperature drops to 50\u00b0C\u201370\u00b0C (120\u00b0F\u2013160\u00b0F).\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/s1-tool-steel-heat-treatment-guide\\\/#faq-question-1768368534070\",\"position\":4,\"url\":\"https:\\\/\\\/aobosteel.com\\\/s1-tool-steel-heat-treatment-guide\\\/#faq-question-1768368534070\",\"name\":\"How to prevent quenching cracks in S1 steel?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Temper the workpiece immediately after quenching while it is still warm (50\u00b0C\u201370\u00b0C); do not let it cool to room temperature. Additionally, ensure designs use rounded corners rather than sharp stress points.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/s1-tool-steel-heat-treatment-guide\\\/#faq-question-1768368534896\",\"position\":5,\"url\":\"https:\\\/\\\/aobosteel.com\\\/s1-tool-steel-heat-treatment-guide\\\/#faq-question-1768368534896\",\"name\":\"What is the tempering process for S1 tool steel?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Temper immediately after quenching with a minimum soak time of 2 hours per 25 mm (1 inch) of thickness. Secondary tempering is strongly recommended to achieve optimal yield strength and impact resistance.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/s1-tool-steel-heat-treatment-guide\\\/#faq-question-1768368535752\",\"position\":6,\"url\":\"https:\\\/\\\/aobosteel.com\\\/s1-tool-steel-heat-treatment-guide\\\/#faq-question-1768368535752\",\"name\":\"What hardness can S1 tool steel achieve?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"After oil quenching, S1 steel typically reaches an as-quenched hardness of 57\u201359 HRC. Tempering at temperatures between 205\u00b0C (400\u00b0F) and 315\u00b0C (600\u00b0F) results in a hardness range of 52\u201357 HRC.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/s1-tool-steel-heat-treatment-guide\\\/#faq-question-1768368604242\",\"position\":7,\"url\":\"https:\\\/\\\/aobosteel.com\\\/s1-tool-steel-heat-treatment-guide\\\/#faq-question-1768368604242\",\"name\":\"Why is preheating necessary for S1 steel?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Preheating to 650\u00b0C (1200\u00b0F) prevents thermal shock and excessive deformation. It ensures synchronous core and surface heating during the final stage, reducing thermal stress and cracking risk for complex geometries.\",\"inLanguage\":\"pt-BR\"},\"inLanguage\":\"pt-BR\"},{\"@type\":\"Question\",\"@id\":\"https:\\\/\\\/aobosteel.com\\\/s1-tool-steel-heat-treatment-guide\\\/#faq-question-1768368605375\",\"position\":8,\"url\":\"https:\\\/\\\/aobosteel.com\\\/s1-tool-steel-heat-treatment-guide\\\/#faq-question-1768368605375\",\"name\":\"How to avoid soft layers or decarburization in S1 steel?\",\"answerCount\":1,\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Heat the steel in a vacuum furnace, neutral salt bath, or controlled neutral atmosphere to prevent surface oxidation. 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Hold this temperature for 15 to 45 minutes, depending on the workpiece thickness, to ensure complete through-hardening.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/s1-tool-steel-heat-treatment-guide\/#faq-question-1768368531226","position":2,"url":"https:\/\/aobosteel.com\/s1-tool-steel-heat-treatment-guide\/#faq-question-1768368531226","name":"Como realizar o al\u00edvio de tens\u00f5es em a\u00e7o ferramenta S1?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Heat the workpiece uniformly to 650\u00b0C\u2013675\u00b0C (1200\u00b0F\u20131250\u00b0F). Allow a soak time of 1 hour per 25 mm (1 inch) of thickness (minimum 1 hour), then cool slowly in air.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/s1-tool-steel-heat-treatment-guide\/#faq-question-1768368533255","position":3,"url":"https:\/\/aobosteel.com\/s1-tool-steel-heat-treatment-guide\/#faq-question-1768368533255","name":"Qual \u00e9 o m\u00e9todo de t\u00eampera recomendado para o a\u00e7o S1?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Oil quenching is strongly recommended to ensure optimal toughness and minimize cracking. Quench in preheated, circulating oil until the workpiece temperature drops to 50\u00b0C\u201370\u00b0C (120\u00b0F\u2013160\u00b0F).","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/s1-tool-steel-heat-treatment-guide\/#faq-question-1768368534070","position":4,"url":"https:\/\/aobosteel.com\/s1-tool-steel-heat-treatment-guide\/#faq-question-1768368534070","name":"Como prevenir fissuras de t\u00eampera no a\u00e7o S1?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Temper the workpiece immediately after quenching while it is still warm (50\u00b0C\u201370\u00b0C); do not let it cool to room temperature. Additionally, ensure designs use rounded corners rather than sharp stress points.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/s1-tool-steel-heat-treatment-guide\/#faq-question-1768368534896","position":5,"url":"https:\/\/aobosteel.com\/s1-tool-steel-heat-treatment-guide\/#faq-question-1768368534896","name":"Qual \u00e9 o processo de revenimento do a\u00e7o ferramenta S1?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Temper immediately after quenching with a minimum soak time of 2 hours per 25 mm (1 inch) of thickness. Secondary tempering is strongly recommended to achieve optimal yield strength and impact resistance.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/s1-tool-steel-heat-treatment-guide\/#faq-question-1768368535752","position":6,"url":"https:\/\/aobosteel.com\/s1-tool-steel-heat-treatment-guide\/#faq-question-1768368535752","name":"Qual a dureza que o a\u00e7o ferramenta S1 pode atingir?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"After oil quenching, S1 steel typically reaches an as-quenched hardness of 57\u201359 HRC. Tempering at temperatures between 205\u00b0C (400\u00b0F) and 315\u00b0C (600\u00b0F) results in a hardness range of 52\u201357 HRC.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/s1-tool-steel-heat-treatment-guide\/#faq-question-1768368604242","position":7,"url":"https:\/\/aobosteel.com\/s1-tool-steel-heat-treatment-guide\/#faq-question-1768368604242","name":"Por que o pr\u00e9-aquecimento \u00e9 necess\u00e1rio para o a\u00e7o S1?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Preheating to 650\u00b0C (1200\u00b0F) prevents thermal shock and excessive deformation. It ensures synchronous core and surface heating during the final stage, reducing thermal stress and cracking risk for complex geometries.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"},{"@type":"Question","@id":"https:\/\/aobosteel.com\/s1-tool-steel-heat-treatment-guide\/#faq-question-1768368605375","position":8,"url":"https:\/\/aobosteel.com\/s1-tool-steel-heat-treatment-guide\/#faq-question-1768368605375","name":"Como evitar camadas moles ou descarboneta\u00e7\u00e3o no a\u00e7o S1?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Heat the steel in a vacuum furnace, neutral salt bath, or controlled neutral atmosphere to prevent surface oxidation. If decarburization occurs, leave sufficient tolerance to grind off the affected layer after heat treatment.","inLanguage":"pt-BR"},"inLanguage":"pt-BR"}]}},"uagb_featured_image_src":{"full":false,"thumbnail":false,"medium":false,"medium_large":false,"large":false,"1536x1536":false,"2048x2048":false,"trp-custom-language-flag":false},"uagb_author_info":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/pt\/blog\/author\/admin\/"},"uagb_comment_info":0,"uagb_excerpt":"S1 Tool Steel Heat Treatment Guide S1 tool steel (1.2550, SKS41) is hardened by preheating to about 650\u00b0C (1200\u00b0F), austenitizing at 900\u00b0C to 955\u00b0C (1650\u00b0F to 1750\u00b0F), oil quenching to 50\u00b0C to 70\u00b0C, and tempering immediately while the part is still warm. As-quenched hardness runs about 57 to 59 HRC, and a double temper between&hellip;","rttpg_featured_image_url":null,"rttpg_author":{"display_name":"Evan","author_link":"https:\/\/aobosteel.com\/pt\/blog\/author\/admin\/"},"rttpg_comment":0,"rttpg_category":null,"rttpg_excerpt":"S1 Tool Steel Heat Treatment Guide S1 tool steel (1.2550, SKS41) is hardened by preheating to about 650\u00b0C (1200\u00b0F), austenitizing at 900\u00b0C to 955\u00b0C (1650\u00b0F to 1750\u00b0F), oil quenching to 50\u00b0C to 70\u00b0C, and tempering immediately while the part is still warm. As-quenched hardness runs about 57 to 59 HRC, and a double temper between&hellip;","_links":{"self":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages\/12240","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/comments?post=12240"}],"version-history":[{"count":1,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages\/12240\/revisions"}],"predecessor-version":[{"id":16166,"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/pages\/12240\/revisions\/16166"}],"wp:attachment":[{"href":"https:\/\/aobosteel.com\/pt\/wp-json\/wp\/v2\/media?parent=12240"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}