{"id":6997,"date":"2025-05-22T10:39:51","date_gmt":"2025-05-22T02:39:51","guid":{"rendered":"https:\/\/aobosteel.com\/?p=6997"},"modified":"2026-01-11T23:20:05","modified_gmt":"2026-01-11T15:20:05","slug":"s7-tool-steel-vs-4140","status":"publish","type":"post","link":"https:\/\/aobosteel.com\/es\/s7-tool-steel-vs-4140\/","title":{"rendered":"Acero para herramientas S7 vs. acero de aleaci\u00f3n 4140: C\u00f3mo elegir la opci\u00f3n correcta para su aplicaci\u00f3n"},"content":{"rendered":"<div class=\"wp-block-group is-layout-constrained wp-block-group-is-layout-constrained\">\n<p>Cuando est\u00e1s mirando <a href=\"https:\/\/aobosteel.com\/es\/s7-steel\/\"><mark style=\"background-color:rgba(0, 0, 0, 0);color:#0693e3\" class=\"has-inline-color\">Acero para herramientas S7<\/mark><\/a> y <a href=\"https:\/\/aobosteel.com\/es\/4140-steel\/\"><mark style=\"background-color:rgba(0, 0, 0, 0);color:#0693e3\" class=\"has-inline-color\">acero de aleaci\u00f3n 4140<\/mark><\/a>Lo m\u00e1s importante que hay que saber desde el principio es que est\u00e1n dise\u00f1ados para trabajos fundamentalmente diferentes. <strong>Si su aplicaci\u00f3n implica altos niveles de impacto o choque, como en muchas operaciones de mecanizado, el S7 suele ser la opci\u00f3n ideal. Si necesita un acero vers\u00e1til y resistente para componentes estructurales como ejes o engranajes, el 4140 suele ser la opci\u00f3n m\u00e1s adecuada.<\/strong> La mejor elecci\u00f3n siempre depende de las demandas espec\u00edficas de lo que est\u00e1s fabricando o del problema que est\u00e1s resolviendo en la f\u00e1brica.<\/p>\n\n\n\n<p>Analicemos estos dos aceros populares con m\u00e1s detalle.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-understanding-s7-tool-steel\">Entendiendo el acero para herramientas S7<\/h2>\n\n\n\n<p>S7 es un acero para herramientas especialmente resistente a los impactos. La &quot;S&quot; en su nombre indica su principal caracter\u00edstica: dureza y capacidad para soportar impactos.<\/p>\n\n\n\n<p><strong>Caracter\u00edsticas clave del S7:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Resistencia al impacto excepcional:<\/strong> Esto es lo que hace famoso al S7. Est\u00e1 dise\u00f1ado para resistir impactos. Su composici\u00f3n qu\u00edmica est\u00e1 dise\u00f1ada para lograr esta alta tenacidad, incluyendo t\u00edpicamente entre 0,50 y 0,601 TP3T de carbono, 0,701 TP3T de manganeso, 0,251 TP3T de silicio (aunque el silicio puede alcanzar hasta 1,901 TP3T en algunas variantes), 3,251 TP3T de cromo y 1,401 TP3T de molibdeno.<\/li>\n\n\n\n<li><strong>Buena resistencia al desgaste:<\/strong> Si bien su funci\u00f3n principal es resistir los impactos, el S7 tambi\u00e9n ofrece una resistencia decente al desgaste, lo que es crucial para muchas aplicaciones de herramientas y matrices.<\/li>\n\n\n\n<li><strong>Endurecimiento al aire:<\/strong> Esta es una gran ventaja. El S7 es un acero de temple al aire, lo que significa que su proceso de tratamiento t\u00e9rmico es generalmente m\u00e1s seguro, m\u00e1s sencillo y produce menos distorsi\u00f3n en comparaci\u00f3n con los aceros que requieren temple l\u00edquido. Puede endurecerse completamente en secciones de hasta aproximadamente 63,5 mm (2,5 pulgadas) con temple al aire a partir de una temperatura de endurecimiento de 941 \u00b0C (1725 \u00b0F). Para m\u00e1s informaci\u00f3n, haga clic en <mark style=\"background-color:rgba(0, 0, 0, 0);color:#0693e3\" class=\"has-inline-color\"><a href=\"https:\/\/aobosteel.com\/es\/s7-tool-steel-heat-treatment\/\">Tratamiento t\u00e9rmico del acero para herramientas S7<\/a><\/mark>.<\/li>\n\n\n\n<li><strong>Funcionamiento t\u00edpico <a href=\"https:\/\/aobosteel.com\/es\/s7-tool-steel-hardness\/\"><mark style=\"background-color:rgba(0, 0, 0, 0);color:#0693e3\" class=\"has-inline-color\">Dureza<\/mark><\/a>:<\/strong> Normalmente ver\u00e1s que el S7 se utiliza con una dureza de alrededor de 56-58 HRC.<\/li>\n<\/ul>\n\n\n\n<p><strong>Aplicaciones de f\u00e1brica comunes para S7:<\/strong><\/p>\n\n\n\n<p>Dadas sus propiedades, S7 es un caballo de batalla para:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Herramientas y matrices sometidas a impacto, tales como herramientas y matrices para trabajo en fr\u00edo medio.<\/li>\n\n\n\n<li>Cuchillas de tijera.<\/li>\n\n\n\n<li>Matrices de moldeo de pl\u00e1stico (especialmente donde la tenacidad es un factor).<\/li>\n\n\n\n<li>Matrices para trabajo en caliente de tama\u00f1o mediano.<\/li>\n\n\n\n<li>Componentes como mandriles y matrices de estampaci\u00f3n en fr\u00edo.<\/li>\n<\/ul>\n\n\n\n<p>En lo que respecta al mecanizado, el S7 en su estado recocido tiene una clasificaci\u00f3n de maquinabilidad de aproximadamente 70, utilizando el acero al carbono 1% como punto de referencia de 100.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"500\" height=\"500\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/S7.webp\" alt=\"Acero para herramientas S7\" class=\"wp-image-5962\" srcset=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/S7.webp 500w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/S7-300x300.webp 300w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/S7-150x150.webp 150w, https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/S7-12x12.webp 12w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-getting-to-know-4140-alloy-steel\">Conozca el acero de aleaci\u00f3n 4140<\/h2>\n\n\n\n<p>Ahora, veamos el 4140. Este no se clasifica t\u00edpicamente como un &quot;acero para herramientas&quot; de la misma manera que el S7. En cambio, el 4140 es un acero de aleaci\u00f3n vers\u00e1til de cromo-molibdeno (a menudo llamado &quot;chromoly&quot;) de medio carbono. El &quot;41&quot; en su designaci\u00f3n SAE indica que el cromo y el molibdeno son elementos clave de la aleaci\u00f3n, y el &quot;40&quot; indica un contenido promedio de carbono de aproximadamente 0.40%. Una composici\u00f3n t\u00edpica para el 4140 incluye 0.38-0.43% de carbono, 0.75-1.0% de manganeso, 0.20-0.35% de silicio, 0.80-1.1% de cromo y 0.15-0.25% de molibdeno.<\/p>\n\n\n\n<p><strong>Caracter\u00edsticas clave del 4140:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Buena resistencia y tenacidad:<\/strong> 4140 ofrece una combinaci\u00f3n s\u00f3lida de resistencia y <a href=\"https:\/\/en.wikipedia.org\/wiki\/Toughness\"><mark style=\"background-color:rgba(0, 0, 0, 0);color:#0693e3\" class=\"has-inline-color\">tenacidad<\/mark><\/a>, lo que lo hace adecuado para piezas que deben soportar una tensi\u00f3n significativa.<\/li>\n\n\n\n<li><strong>Resistencia a tensiones de torsi\u00f3n y de inversi\u00f3n:<\/strong> Esto lo hace excelente para aplicaciones como ejes.<\/li>\n\n\n\n<li><strong>Tratamiento t\u00e9rmico vers\u00e1til:<\/strong> El acero 4140 responde bien a diversos tratamientos t\u00e9rmicos. Se suele templar y revener para lograr las propiedades mec\u00e1nicas deseadas. Tambi\u00e9n es muy adecuado para procesos de endurecimiento superficial como la nitruraci\u00f3n (para lograr una superficie muy dura, de alrededor de 690 HK o aproximadamente 57 HRC) o el endurecimiento por inducci\u00f3n, que puede proporcionar una superficie resistente al desgaste con un n\u00facleo tenaz.<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/en.wikipedia.org\/wiki\/Weldability\"><mark style=\"background-color:rgba(0, 0, 0, 0);color:#0693e3\" class=\"has-inline-color\">Soldabilidad<\/mark><\/a> y falsificabilidad:<\/strong> Se puede soldar y forjar f\u00e1cilmente, lo que aumenta su versatilidad.<\/li>\n<\/ul>\n\n\n\n<p><strong>Aplicaciones de f\u00e1brica comunes para 4140:<\/strong><\/p>\n\n\n\n<p>Encontrar\u00e1 que el n\u00famero 4140 se utiliza ampliamente para:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ejes de transmisi\u00f3n.<\/li>\n\n\n\n<li>Ejes.<\/li>\n\n\n\n<li>Engranajes.<\/li>\n\n\n\n<li>Husillos.<\/li>\n\n\n\n<li>Otros componentes estructurales y forjados donde se requiera buena resistencia, tenacidad y resistencia a la fatiga.<\/li>\n<\/ul>\n\n\n\n<p>La maquinabilidad del acero 4140 depende en gran medida de su dureza y del tratamiento t\u00e9rmico. En estado recocido (alrededor de 150-200 HB), es razonablemente mecanizable. Sin embargo, tras el temple y revenido a niveles de dureza m\u00e1s altos, o especialmente tras la nitruraci\u00f3n, el mecanizado se vuelve m\u00e1s complejo.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/4140-steel-small.avif\" alt=\"acero de aleaci\u00f3n 4140\" class=\"wp-image-5934\"\/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-s7-vs-4140-the-head-to-head-comparison\">S7 vs. 4140: La comparaci\u00f3n directa<\/h2>\n\n\n\n<p>La diferencia principal radica en su prop\u00f3sito previsto: S7 es un acero para herramientas especializado para aplicaciones de impacto, mientras que 4140 es un acero de aleaci\u00f3n de ingenier\u00eda de uso general para uso estructural.<\/p>\n\n\n\n<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n    <meta charset=\"UTF-8\">\n    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n    <title>Comparaci\u00f3n entre el acero S7 y el 4140<\/title>\n    <style>\n        \/* Scoped styles for the steel comparison block *\/\n        #s7-vs-4140-steel-comparison-block {\n            font-family: Arial, Helvetica, sans-serif; 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\/* Make table take full width of its container *\/\n            border-collapse: collapse; \/* Merge cell borders *\/\n            margin-top: 1em; \/* Space above the table - adjusted to 0 as title\/intro removed *\/\n            \/* If title and intro were present, margin-top: 1em; would be fine *\/\n            \/* Considering no elements above table within this block now, margin-top can be 0 or small *\/\n        }\n\n        #s7-vs-4140-steel-comparison-block th,\n        #s7-vs-4140-steel-comparison-block td {\n            border: 1px solid #cccccc; \/* Lighter border for table cells *\/\n            padding: 10px; \/* Padding within cells *\/\n            text-align: left; \/* Align text to the left within cells *\/\n            vertical-align: top; \/* Align content to the top of the cell *\/\n        }\n\n        #s7-vs-4140-steel-comparison-block th {\n            background-color: #f0f0f0; \/* Light gray background for header cells *\/\n            font-weight: bold;\n            color: #333333;\n            font-size: 1.1em;\n        }\n\n        #s7-vs-4140-steel-comparison-block td strong { \/* For highlighting within cells, if any *\/\n            font-weight: bold;\n            color: #000000;\n        }\n\n        \/* Style for the first column (Feature) to be slightly distinct *\/\n        #s7-vs-4140-steel-comparison-block td:first-child,\n        #s7-vs-4140-steel-comparison-block th:first-child {\n             \/* background-color: #f9f9f9; *\/ \/* Slightly different background for the feature column header *\/\n             font-weight: bold;\n        }\n        \n        \/* Responsive considerations for the table *\/\n        @media screen and (max-width: 600px) {\n            #s7-vs-4140-steel-comparison-block th,\n            #s7-vs-4140-steel-comparison-block td {\n                font-size: 0.9em; \/* Slightly smaller font on small screens *\/\n                padding: 8px;\n            }\n            \/*\n            #s7-vs-4140-steel-comparison-block h2 {\n                font-size: 1.4em;\n            }\n            *\/\n        }\n\n    <\/style>\n<\/head>\n<body>\n\n    <div id=\"s7-vs-4140-steel-comparison-block\">\n        <table>\n            <thead>\n                <tr>\n                    <th>Caracter\u00edstica<\/th>\n                    <th>Acero S7<\/th>\n                    <th>Acero 4140<\/th>\n                <\/tr>\n            <\/thead>\n            <tbody>\n                <tr>\n                    <td><strong>Rol principal<\/strong><\/td>\n                    <td>Herramientas, especialmente herramientas y matrices resistentes a los golpes.<\/td>\n                    <td>Componentes estructurales, piezas de m\u00e1quinas.<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Resistencia al impacto (Tenacidad)<\/strong><\/td>\n                    <td>Superior. Dise\u00f1ado espec\u00edficamente para situaciones de alto impacto.<\/td>\n                    <td>Buena dureza, pero no al mismo nivel que el S7 en cuanto a resistencia a los golpes.<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Dureza y resistencia al desgaste<\/strong><\/td>\n                    <td>Logra una alta dureza (normalmente 56-58 HRC) y una buena resistencia al desgaste gracias a su tratamiento t\u00e9rmico de endurecimiento al aire est\u00e1ndar.<\/td>\n                    <td>Obtiene sus propiedades mediante temple y revenido. Puede endurecerse superficialmente (p. ej., nitruraci\u00f3n o inducci\u00f3n) para lograr una alta resistencia al desgaste superficial, manteniendo el n\u00facleo m\u00e1s tenaz y menos fr\u00e1gil. Su capacidad de temple total es moderada.<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Tratamiento t\u00e9rmico<\/strong><\/td>\n                    <td>Endurecimiento al aire. Esto generalmente implica un procesamiento m\u00e1s sencillo, dimensiones m\u00e1s estables despu\u00e9s del tratamiento y un menor riesgo de agrietamiento o deformaci\u00f3n.<\/td>\n                    <td>T\u00edpicamente templado y revenido en aceite o agua. Ofrece flexibilidad para adaptar las propiedades mediante diferentes temperaturas de revenido o m\u00e9todos de endurecimiento superficial.<\/td>\n                <\/tr>\n                <tr>\n                    <td><strong>Aspectos destacados de la composici\u00f3n<\/strong><\/td>\n                    <td>Mayor contenido de cromo (aprox. 3,25%) y molibdeno (aprox. 1,40%), junto con niveles espec\u00edficos de carbono, manganeso y silicio, que contribuyen a su resistencia a los golpes, templabilidad y caracter\u00edsticas de desgaste.<\/td>\n                    <td>Contenido moderado de cromo (aprox. 0,80-1,1%) y molibdeno (aprox. 0,15-0,25%), con carbono, manganeso y silicio controlados, lo que proporciona un buen equilibrio entre resistencia, tenacidad y templabilidad para los usos previstos.<\/td>\n                <\/tr>\n            <\/tbody>\n        <\/table>\n    <\/div>\n\n<\/body>\n<\/html>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-making-the-right-call-for-your-factory\">Tomar la decisi\u00f3n correcta para su f\u00e1brica<\/h2>\n\n\n\n<p>Entonces, \u00bfc\u00f3mo elegir?<\/p>\n\n\n\n<style>\n  #steel-comparison-block-v2 {\n    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; \/* Modern, clean font stack *\/\n    color: #4A4A4A; \/* Slightly softer text color *\/\n    background-color: #f9f9f9; \/* Light gray background for the entire block *\/\n    padding: 20px;\n    margin: 20px 0;\n    width: 100%;\n    box-sizing: border-box;\n    border-radius: 8px; \/* Rounded corners for the main block *\/\n    line-height: 1.6;\n  }\n\n  #steel-comparison-block-v2 .steel-type-section {\n    background-color: #ffffff; \/* White background for each steel section *\/\n    border: 1px solid #e7e7e7; \/* Lighter border for sections *\/\n    border-radius: 6px; \/* Rounded corners for sections *\/\n    padding: 20px;\n    margin-bottom: 20px; \/* Space between sections *\/\n    box-shadow: 0 2px 4px rgba(0,0,0,0.05); \/* Subtle shadow for depth *\/\n  }\n\n  \/* Remove margin from the last section *\/\n  #steel-comparison-block-v2 .steel-type-section:last-child {\n    margin-bottom: 0;\n  }\n\n  #steel-comparison-block-v2 h3 {\n    font-size: 1.4em; \/* Slightly larger heading *\/\n    font-weight: 600; \/* Semi-bold for a modern feel *\/\n    color: #2c3e50; \/* Dark blue-gray for headings *\/\n    margin-top: 0;\n    margin-bottom: 18px;\n    padding-bottom: 10px;\n    border-bottom: 2px solid #3498db; \/* Accent color border under heading *\/\n    display: inline-block; \/* Makes border only as wide as text *\/\n  }\n\n  #steel-comparison-block-v2 ul {\n    list-style-type: none; \/* Remove default bullets *\/\n    padding-left: 0;\n    margin-bottom: 0;\n  }\n\n  #steel-comparison-block-v2 li {\n    margin-bottom: 12px; \/* Space between list items *\/\n    padding-left: 25px; \/* Space for custom bullet *\/\n    position: relative; \/* For custom bullet positioning *\/\n  }\n\n  \/* Custom bullet style *\/\n  #steel-comparison-block-v2 li::before {\n    content: '\u2713'; \/* Checkmark symbol *\/\n    color: #3498db; \/* Accent color for bullet *\/\n    font-weight: bold;\n    position: absolute;\n    left: 0;\n    top: 0;\n    font-size: 1.1em;\n  }\n\n  \/* Ensure styles are self-contained *\/\n<\/style>\n\n<div id=\"steel-comparison-block-v2\">\n  <div class=\"steel-type-section\">\n    <h3>Opte por S7 cuando:<\/h3>\n    <ul>\n      <li>Su principal preocupaci\u00f3n es una dureza excepcional y resistencia a golpes e impactos.<\/li>\n      <li>Est\u00e1s fabricando herramientas o matrices que experimentar\u00e1n golpes repetidos o tensiones elevadas.<\/li>\n      <li>La estabilidad y simplicidad del endurecimiento al aire son ventajosas para sus capacidades de tratamiento t\u00e9rmico.<\/li>\n    <\/ul>\n  <\/div>\n\n  <div class=\"steel-type-section\">\n    <h3>Opte por 4140 cuando:<\/h3>\n    <ul>\n      <li>Necesita un buen acero de ingenier\u00eda vers\u00e1til para piezas estructurales.<\/li>\n      <li>El componente requiere un buen equilibrio entre resistencia, tenacidad y resistencia a la fatiga (por ejemplo, ejes, engranajes).<\/li>\n      <li>La capacidad de endurecer la superficie para mejorar la resistencia al desgaste en \u00e1reas espec\u00edficas, manteniendo al mismo tiempo la tenacidad del n\u00facleo, es beneficiosa.<\/li>\n    <\/ul>\n  <\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-final-thoughts\">Reflexiones finales<\/h2>\n\n\n\n<p>Tanto el acero para herramientas S7 como el acero de aleaci\u00f3n 4140 son materiales excelentes, pero destacan en diferentes \u00e1mbitos. El S7 es su especialista en herramientas de alto impacto, ofreciendo una resistencia inigualable a los impactos. El 4140 es su herramienta vers\u00e1til para una amplia gama de componentes estructurales y de maquinaria que requieren alta resistencia y tenacidad.<\/p>\n\n\n\n<p>Comprender la funci\u00f3n espec\u00edfica que su acero necesita es el primer y m\u00e1s importante paso para seleccionar el grado correcto. Si tiene dudas, analizar los detalles de su aplicaci\u00f3n puede ayudarle a identificar el mejor material para garantizar el rendimiento y la durabilidad de sus piezas.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>When you&#8217;re looking at S7 tool steel and 4140 alloy steel, the most important thing to know right off the bat is that they are designed for fundamentally different jobs. If your application involves high shock or impact, like in many tooling operations, S7 is generally your go-to. If you need a versatile, strong steel [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5962,"comment_status":"open","ping_status":"0","sticky":false,"template":"","format":"standard","meta":{"content-type":"blog-post","_uag_custom_page_level_css":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","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":"","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":""},"categories":[22],"tags":[],"class_list":["post-6997","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.5 (Yoast SEO v27.5) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>S7 tool steel vs 4140 - AoboSteel<\/title>\n<meta name=\"description\" content=\"Explore the differences between S7 tool steel vs 4140. 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