{"id":15996,"date":"2026-06-22T19:24:47","date_gmt":"2026-06-22T11:24:47","guid":{"rendered":"https:\/\/aobosteel.com\/?page_id=15996"},"modified":"2026-06-25T10:11:29","modified_gmt":"2026-06-25T02:11:29","slug":"4140-vs-h13","status":"publish","type":"page","link":"https:\/\/aobosteel.com\/es\/4140-vs-h13\/","title":{"rendered":"Acero para herramientas 4140 vs. H13: Diferencias y gu\u00eda de selecci\u00f3n"},"content":{"rendered":"<section class=\"aobo-4140-h13-page\">\n  <style>\n    .aobo-4140-h13-page {\n      --aobo-blue: #0c56d0;\n      --aobo-blue-dark: #073b8e;\n      --aobo-blue-soft: #eaf2ff;\n      --aobo-blue-line: #c9dcff;\n      --aobo-border: #d7e5fb;\n      --aobo-text: #203044;\n      --aobo-muted: #617087;\n      --aobo-orange: #f59b23;\n      --aobo-white: #ffffff;\n      --aobo-shadow: 0 18px 45px rgba(12, 86, 208, 0.10);\n      font-family: inherit;\n      color: var(--aobo-text);\n      line-height: 1.7;\n      background: transparent;\n      padding: 0;\n      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class=\"aobo-eyebrow\">Acero para herramientas de trabajo en caliente frente a acero aleado estructural<\/span>\n      <h1>Acero para herramientas 4140 vs H13: \u00bfPara trabajo en caliente o para piezas mec\u00e1nicas?<\/h1>\n      <p>El acero 4140 es una aleaci\u00f3n estructural de cromo-molibdeno para componentes de maquinaria que funcionan a temperatura ambiente o moderada. El acero H13 es un acero para herramientas de trabajo en caliente, destinado a matrices y utillajes que operan a altas temperaturas, a menudo superiores a 500 \u00b0C.<\/p>\n      <p>La posibilidad de sustituir un material por otro en una pieza determinada depende casi exclusivamente de la temperatura de funcionamiento. Utilice H13 cuando la dureza en caliente, la resistencia a la fatiga t\u00e9rmica y la resistencia a la erosi\u00f3n por metal fundido sean factores importantes. Utilice 4140 para ejes, soportes, fijaciones y piezas estructurales de maquinaria que no trabajen a altas temperaturas.<\/p>\n    <\/header>\n\n    <section class=\"aobo-product-strip\" aria-label=\"Producto de acero para herramientas H13 de Aobo Steel.\">\n      <h2>Acero para herramientas H13 de Aobo Steel<\/h2>\n      <p class=\"aobo-strip-intro\">Si su aplicaci\u00f3n requiere altas temperaturas, el grado H13 es el indicado. Aobo Steel suministra H13 forjado y laminado, recocido, en forma de barra redonda, barra plana y bloque forjado. El H13 ESR est\u00e1 disponible para fundici\u00f3n a presi\u00f3n de alta calidad y trabajos de pulido fino.<\/p>\n\n      <div class=\"aobo-product-grid\">\n        <article class=\"aobo-product-card\">\n          <div class=\"aobo-product-image\">\n            <img decoding=\"async\" src=\"https:\/\/aobosteel.com\/wp-content\/uploads\/2025\/04\/H13-STEEL-FLAT-BAR.avif\" alt=\"Barra plana de acero para herramientas H13 suministrada por Aobo Steel.\" loading=\"lazy\">\n          <\/div>\n          <div>\n            <h3>H13 | 1.2344 | SKD61<\/h3>\n            <p class=\"aobo-card-note\">Acero para herramientas de trabajo en caliente destinado a matrices de fundici\u00f3n de aluminio, matrices de forja en caliente, herramientas de extrusi\u00f3n en caliente, cuchillas de corte en caliente, mandriles, insertos y herramientas que deben resistir el agrietamiento por calor.<\/p>\n            <div class=\"aobo-buttons\">\n              <a class=\"aobo-btn aobo-btn-detail\" href=\"https:\/\/aobosteel.com\/es\/h13-tool-steel\/\">Ver detalles de suministro H13<\/a>\n              <a class=\"aobo-btn aobo-btn-inquiry popmake-16052\" href=\"javascript:void(0);\">Enviar consulta<\/a>\n            <\/div>\n          <\/div>\n        <\/article>\n      <\/div>\n    <\/section>\n\n    <main class=\"aobo-article\">\n      <h2>Respuesta r\u00e1pida: 4140 vs H13<\/h2>\n      <p>Los aceros 4140 y H13 pueden alcanzar una dureza m\u00e1xima similar en secciones delgadas, pero no se utilizan para las mismas aplicaciones. El 4140 es un acero aleado estructural de alta resistencia. El H13 est\u00e1 dise\u00f1ado para mantener la dureza, la resistencia y la integridad superficial durante el servicio repetido a altas temperaturas.<\/p>\n\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Factor de decisi\u00f3n<\/th><th>Acero aleado 4140<\/th><th>Acero para herramientas H13<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Tipo de acero<\/td><td>acero estructural de aleaci\u00f3n de cromo-molibdeno<\/td><td>Acero para herramientas de trabajo en caliente al cromo<\/td><\/tr>\n            <tr><td>Papel principal<\/td><td>Componentes estructurales y de m\u00e1quinas portantes<\/td><td>Troqueles calientes, insertos, herramientas y utillaje para altas temperaturas.<\/td><\/tr>\n            <tr><td>Dureza de trabajo t\u00edpica<\/td><td>28-32 HRC, a veces 30-45 HRC despu\u00e9s del temple y revenido.<\/td><td>44-52 HRC para muchas herramientas de trabajo en caliente<\/td><\/tr>\n            <tr><td>Servicio de alta temperatura<\/td><td>Se ablanda r\u00e1pidamente al aumentar la temperatura.<\/td><td>Mantiene una dureza y resistencia \u00fatiles en caliente.<\/td><\/tr>\n            <tr><td>Resistencia a la fatiga t\u00e9rmica<\/td><td>Poco adecuado para ciclismo en climas c\u00e1lidos y fr\u00edos.<\/td><td>Excelente resistencia al calor<\/td><\/tr>\n            <tr><td>Mejor uso<\/td><td>Ejes, engranajes, ejes, pernos, fijaciones, soportes, placas base<\/td><td>Matrices de fundici\u00f3n a presi\u00f3n, matrices de forja, matrices de extrusi\u00f3n, cuchillas de corte en caliente<\/td><\/tr>\n            <tr><td>Coste<\/td><td>Menor costo de los materiales<\/td><td>Mayor coste de material, pero mayor vida \u00fatil en trabajos en caliente.<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n\n      <div class=\"aobo-note-box\">\n        <p><strong>Regla de selecci\u00f3n:<\/strong> Si la superficie de trabajo se somete a temperaturas superiores a 350-400 \u00b0C de forma sostenida, elija H13. Si la pieza es un soporte estructural o un componente mec\u00e1nico que funciona a temperatura ambiente o moderada, generalmente basta con 4140.<\/p>\n      <\/div>\n\n      <h2>Composici\u00f3n qu\u00edmica<\/h2>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Elemento<\/th><th>4140<\/th><th>H13<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Carbono (C)<\/td><td>0.38-0.43%<\/td><td>0.35-0.42%<\/td><\/tr>\n            <tr><td>Silicio (Si)<\/td><td>0.15-0.35%<\/td><td>0.80-1.20%<\/td><\/tr>\n            <tr><td>Manganeso (Mn)<\/td><td>0.75-1.00%<\/td><td>0.25-0.50%<\/td><\/tr>\n            <tr><td>Cromo (Cr)<\/td><td>0.80-1.10%<\/td><td>4.80-5.50%<\/td><\/tr>\n            <tr><td>Molibdeno (Mo)<\/td><td>0.15-0.25%<\/td><td>1.20-1.50%<\/td><\/tr>\n            <tr><td>Vanadio (V)<\/td><td>Ninguno<\/td><td>0.80-1.20%<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>Ambos grados contienen cantidades similares de carbono, por lo que su dureza m\u00e1xima tras el temple es parecida. La diferencia decisiva radica en la composici\u00f3n de la aleaci\u00f3n. El H13 contiene aproximadamente cinco veces m\u00e1s cromo, seis veces m\u00e1s molibdeno y una adici\u00f3n deliberada de vanadio. Estos elementos forman carburos de aleaci\u00f3n estables e impulsan el endurecimiento secundario, lo que permite que el H13 mantenga su dureza en caliente.<\/p>\n      <p>El acero 4140 contiene mucha menos aleaci\u00f3n porque nunca se dise\u00f1\u00f3 para trabajar a altas temperaturas. Su composici\u00f3n qu\u00edmica est\u00e1 pensada para ofrecer resistencia, tenacidad, templabilidad y maquinabilidad en aplicaciones estructurales.<\/p>\n\n      <h2>Principales diferencias entre propiedades<\/h2>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Propiedad<\/th><th>4140<\/th><th>H13<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Tipo de acero<\/td><td>acero estructural aleado<\/td><td>Acero para herramientas en caliente<\/td><\/tr>\n            <tr><td>Dureza de trabajo t\u00edpica<\/td><td>28-32 HRC<\/td><td>44-52 HRC<\/td><\/tr>\n            <tr><td>dureza m\u00e1xima alcanzable<\/td><td>Aproximadamente 55 HRC<\/td><td>Aproximadamente 54 HRC<\/td><\/tr>\n            <tr><td>Dureza en caliente a 500 \u00b0C<\/td><td>Se ablanda r\u00e1pidamente<\/td><td>Mantiene la dureza<\/td><\/tr>\n            <tr><td>Resistencia a la fatiga t\u00e9rmica<\/td><td>Pobre<\/td><td>Excelente<\/td><\/tr>\n            <tr><td>Resistencia al desgaste, temperatura ambiente<\/td><td>Bajo<\/td><td>Moderado<\/td><\/tr>\n            <tr><td>Resistencia al desgaste, calor<\/td><td>Pobre<\/td><td>Bien<\/td><\/tr>\n            <tr><td>Dureza<\/td><td>Bien<\/td><td>Bien<\/td><\/tr>\n            <tr><td>Maquinabilidad, recocido<\/td><td>Excelente<\/td><td>Bien<\/td><\/tr>\n            <tr><td>Coste por kg<\/td><td>M\u00e1s bajo<\/td><td>M\u00e1s alto<\/td><\/tr>\n            <tr><td>Soldabilidad<\/td><td>M\u00e1s f\u00e1cil con precalentamiento<\/td><td>M\u00e1s dif\u00edcil<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n      <p>Debido a su contenido de carbono, el acero 4140 puede templarse hasta alcanzar una dureza similar a la del H13, o incluso ligeramente superior. La dureza m\u00e1xima no es lo que distingue a ambos grados, y de hecho, el 4140 rara vez supera los 45 HRC, ya que su tenacidad disminuye. La diferencia crucial se produce al calentarse: el 4140 pierde dureza, mientras que el H13 la conserva.<\/p>\n\n      <h2>\u00bfCu\u00e1ndo elegir H13 en lugar de 4140?<\/h2>\n      <div class=\"aobo-choice-grid\">\n        <article class=\"aobo-choice-card\">\n          <h3>La pieza se calienta<\/h3>\n          <p>Por encima de los 350-400 \u00b0C, aproximadamente, el acero 4140 pierde resistencia r\u00e1pidamente porque no tiene un endurecimiento secundario al que recurrir. El acero H13 mantiene una dureza y resistencia \u00fatiles hasta alrededor de los 600 \u00b0C.<\/p>\n        <\/article>\n        <article class=\"aobo-choice-card\">\n          <h3>La pieza alterna entre caliente y fr\u00edo.<\/h3>\n          <p>Los ciclos repetidos de calentamiento y enfriamiento provocan fisuras t\u00e9rmicas. El acero H13 resiste estas finas fisuras superficiales mucho mejor que el 4140.<\/p>\n        <\/article>\n        <article class=\"aobo-choice-card\">\n          <h3>La prenda debe resistir la temperatura<\/h3>\n          <p>El acero 4140 presenta un desgaste aceptable a temperatura ambiente, pero se ablanda y se desgasta r\u00e1pidamente al calentarse. Los carburos de aleaci\u00f3n y el endurecimiento secundario del H13 mejoran su resistencia al desgaste en altas temperaturas.<\/p>\n        <\/article>\n        <article class=\"aobo-choice-card\">\n          <h3>La superficie est\u00e1 expuesta al metal fundido.<\/h3>\n          <p>En la fundici\u00f3n a presi\u00f3n, el aluminio fundido a unos 680 \u00b0C o el zinc a unos 420 \u00b0C pueden erosionar la superficie del molde. El acero H13 resiste la erosi\u00f3n mucho mejor que el 4140.<\/p>\n        <\/article>\n      <\/div>\n      <p>Las aplicaciones t\u00edpicas del H13 incluyen matrices de fundici\u00f3n de aluminio, matrices de forja en caliente, herramientas de extrusi\u00f3n en caliente, matrices de estampado en caliente, cuchillas de corte en caliente, pasadores de n\u00facleo, mandriles e insertos para trabajo en caliente.<\/p>\n\n      <h2>Cuando 4140 es suficiente<\/h2>\n      <p>El acero 4140 suele ser la opci\u00f3n correcta cuando la pieza no es una herramienta de trabajo en caliente:<\/p>\n      <ul>\n        <li>Los componentes que se mantienen a temperatura ambiente o por debajo de unos 250 \u00b0C, como ejes, piezas de m\u00e1quinas, elementos de fijaci\u00f3n y componentes estructurales, deben mantenerse a temperatura ambiente o por debajo de ella.<\/li>\n        <li>La pieza es un soporte, refuerzo o placa base que sirve de apoyo a las herramientas, pero que nunca entra en contacto directo con el metal caliente.<\/li>\n        <li>Una buena tenacidad con una dureza moderada, generalmente de 30 a 40 HRC, cumple con el requisito.<\/li>\n        <li>La soldadura o la reparaci\u00f3n de soldaduras es importante, ya que el acero 4140 la tolera mejor que el H13.<\/li>\n        <li>El coste de los materiales es la principal limitaci\u00f3n y el arancel es bajo.<\/li>\n      <\/ul>\n\n      <h2>Gu\u00eda de aplicaci\u00f3n r\u00e1pida<\/h2>\n      <div class=\"aobo-table-wrap\">\n        <table class=\"aobo-table\">\n          <thead>\n            <tr><th>Aplicaci\u00f3n<\/th><th>Recomendado<\/th><th>Por qu\u00e9<\/th><\/tr>\n          <\/thead>\n          <tbody>\n            <tr><td>Molde de fundici\u00f3n a presi\u00f3n de aluminio<\/td><td>H13<\/td><td>La dureza en caliente, la resistencia a la fatiga t\u00e9rmica y la resistencia a la erosi\u00f3n son todas esenciales.<\/td><\/tr>\n            <tr><td>Matriz de forja en caliente<\/td><td>H13<\/td><td>El calor sostenido y el impacto requieren acero para herramientas de trabajo en caliente.<\/td><\/tr>\n            <tr><td>Matriz de extrusi\u00f3n de aluminio<\/td><td>H13<\/td><td>Se requiere resistencia al desgaste por altas temperaturas y a la fatiga t\u00e9rmica.<\/td><\/tr>\n            <tr><td>cuchilla de corte caliente<\/td><td>H13 o H10<\/td><td>La dureza en caliente y la resistencia al desgaste controlan la vida \u00fatil de la hoja.<\/td><\/tr>\n            <tr><td>Soporte de matriz o placa de refuerzo<\/td><td>4140 o P20<\/td><td>Esta pieza proporciona soporte estructural y no se calienta directamente.<\/td><\/tr>\n            <tr><td>Eje de la m\u00e1quina a temperatura ambiente<\/td><td>4140<\/td><td>Buena resistencia y durabilidad a un menor coste.<\/td><\/tr>\n            <tr><td>matriz de producci\u00f3n para trabajo en fr\u00edo<\/td><td>D2 o A2<\/td><td>Los aceros espec\u00edficos para trabajo en fr\u00edo ofrecen una mayor resistencia al desgaste.<\/td><\/tr>\n          <\/tbody>\n        <\/table>\n      <\/div>\n\n      <h2>Por qu\u00e9 los materiales m\u00e1s baratos suelen costar m\u00e1s<\/h2>\n      <p>El acero H13 cuesta m\u00e1s por kilogramo que el 4140 debido a su mayor contenido de aleaci\u00f3n y a un procesamiento m\u00e1s complejo. Sin embargo, en aplicaciones de trabajo en caliente, lo que realmente importa es el costo por pieza producida.<\/p>\n      <ul>\n        <li>Los chips H13 duran mucho m\u00e1s, lo que significa menos cambios de chips y menos tiempo de inactividad.<\/li>\n        <li>A medida que el troquel se degrada, se desechan menos piezas.<\/li>\n        <li>El H13 tolera la refrigeraci\u00f3n agresiva y los ciclos t\u00e9rmicos sin agrietarse prematuramente, lo que favorece una producci\u00f3n m\u00e1s r\u00e1pida y estable.<\/li>\n      <\/ul>\n      <p>Especificar el acero 4140 en una herramienta para trabajo en caliente con el fin de ahorrar material suele ser un falso ahorro. La menor vida \u00fatil del troquel y la p\u00e9rdida de tiempo de producci\u00f3n pueden costar mucho m\u00e1s que el material ahorrado.<\/p>\n\n      <h2>Suministro de acero Aobo<\/h2>\n      <p>Suministros de acero Aobo <a href=\"https:\/\/aobosteel.com\/es\/h13-tool-steel\/\">Acero para herramientas H13<\/a> (1.2344 \/ SKD61 \/ 4Cr5MoSiV1) en forma forjada y laminada, principalmente en estado recocido para exportaci\u00f3n a granel. H13 es uno de nuestros grados principales, disponible en barras redondas, barras planas y bloques forjados. H13 ESR est\u00e1 disponible para fundici\u00f3n a presi\u00f3n de alta calidad y aplicaciones de alto pulido.<\/p>\n      <p>Para el acero 4140, por favor, cons\u00faltenos. Aobo Steel se especializa en aceros para herramientas y moldes, no en aleaciones de ingenier\u00eda general, por lo que la disponibilidad del 4140 se confirma bajo pedido. Cuando la pieza lo permite, una alternativa de acero para herramientas suele ofrecer un mejor valor a largo plazo.<\/p>\n    <\/main>\n\n    <section class=\"aobo-related-pages\" aria-label=\"P\u00e1ginas relacionadas con el acero para herramientas H13\">\n      <h2>P\u00e1ginas relacionadas<\/h2>\n      <div class=\"aobo-related-grid\">\n        <a class=\"aobo-related-card\" href=\"https:\/\/aobosteel.com\/es\/h13-tool-steel\/\">\n          <strong>Proveedor de acero para herramientas H13<\/strong>\n          <span>H13 suministra detalles para barras redondas, barras planas, bloques forjados, material recocido y calidad ESR.<\/span>\n        <\/a>\n        <a class=\"aobo-related-card\" href=\"https:\/\/aobosteel.com\/es\/h13-tool-steel-applications\/\">\n          <strong>Aplicaciones del acero para herramientas H13<\/strong>\n          <span>El H13 funciona mejor en fundici\u00f3n a presi\u00f3n, forja en caliente, extrusi\u00f3n, cizallado en caliente y utillaje de moldes.<\/span>\n        <\/a>\n        <a class=\"aobo-related-card\" href=\"https:\/\/aobosteel.com\/es\/h13-tool-steel-machinability\/\">\n          <strong>Maquinabilidad del acero para herramientas H13<\/strong>\n          <span>Gu\u00eda de mecanizado para acero H13 recocido y endurecido, incluyendo l\u00edmites pr\u00e1cticos de fabricaci\u00f3n.<\/span>\n        <\/a>\n        <a class=\"aobo-related-card\" href=\"https:\/\/aobosteel.com\/es\/when-to-choose-esr-h13-tool-steel\/\">\n          <strong>\u00bfCu\u00e1ndo elegir ESR H13?<\/strong>\n          <span>C\u00f3mo determinar cu\u00e1ndo se justifica la calidad ESR para la fundici\u00f3n a presi\u00f3n, la forja y las herramientas de alta fiabilidad.<\/span>\n        <\/a>\n      <\/div>\n    <\/section>\n\n    <section class=\"aobo-final-cta\">\n      <div>\n        <h2>\u00bfNecesita H13 para herramientas de trabajo en caliente?<\/h2>\n        <p>Indique el grado, tama\u00f1o, cantidad, plazo de entrega y aplicaci\u00f3n. Aobo Steel confirmar\u00e1 el suministro de acero H13 forjado o laminado, el estado recocido, la opci\u00f3n ESR y los requisitos del certificado de f\u00e1brica.<\/p>\n      <\/div>\n      <a class=\"aobo-btn popmake-16052\" href=\"javascript:void(0);\">Enviar consulta<\/a>\n    <\/section>\n  <\/div>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>Hot Work Tool Steel vs Structural Alloy Steel 4140 vs H13 Tool Steel: Hot Work or Mechanical Parts? 4140 is a chromium-molybdenum structural alloy steel for machinery components that run at room to moderate temperature. H13 is a hot work tool steel for dies and tooling that operate hot, often above 500\u00b0C. Whether one can [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":15997,"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-15996","page","type-page","status-publish","has-post-thumbnail","hentry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v28.2 (Yoast SEO v28.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>4140 vs H13 Tool Steel: Differences and Selection Guide - AoboSteel<\/title>\n<meta name=\"description\" content=\"Compare 4140 alloy steel and H13 tool steel: composition, hardness, and hot performance. 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