{"id":7325,"date":"2026-09-30T17:04:55","date_gmt":"2026-09-30T09:04:55","guid":{"rendered":"https:\/\/www.cjmsteelgroup.com\/?p=7325"},"modified":"2026-09-30T17:04:58","modified_gmt":"2026-09-30T09:04:58","slug":"4140-steel-technical-guide","status":"publish","type":"post","link":"https:\/\/www.cjmsteelgroup.com\/es\/4140-steel-technical-guide.html","title":{"rendered":"4140 Steel Properties, Composition and Equivalent Grades"},"content":{"rendered":"<h2 class=\"wp-block-heading has-black-color has-text-color has-link-color has-medium-font-size wp-elements-0445f089f6c8e1d1f6e6378d58fe0701\"><strong>Introducci\u00f3n<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-0680695de9f35b315ff3b13ae4795a66\">Esta gu\u00eda incluye <strong>Propiedades del acero 4140<\/strong>incluyendo <strong>chemical composition, mechanical properties, yield strength, equivalent grades, and key technical data<\/strong>, with processing and welding considerations for industrial applications.<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-9ac00cf961d1ea846fe5a532228b76c6\"><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"690\" height=\"472\" src=\"https:\/\/www.cjmsteelgroup.com\/wp-content\/uploads\/2025\/09\/4140-steel-mechanical-properties-1.png\" alt=\"Chemical composition of 4140 steel showing C, Cr, Mo, Mn, Si content\" class=\"wp-image-7327\" style=\"width:600px\" srcset=\"https:\/\/www.cjmsteelgroup.com\/wp-content\/uploads\/2025\/09\/4140-steel-mechanical-properties-1.png 690w, https:\/\/www.cjmsteelgroup.com\/wp-content\/uploads\/2025\/09\/4140-steel-mechanical-properties-1-300x205.png 300w, https:\/\/www.cjmsteelgroup.com\/wp-content\/uploads\/2025\/09\/4140-steel-mechanical-properties-1-18x12.png 18w\" sizes=\"auto, (max-width: 690px) 100vw, 690px\" \/><\/figure><\/div>\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading has-black-color has-text-color has-link-color has-medium-font-size wp-elements-2af87002d2a2754b26d09fc03ce91a21\"><strong>Composici\u00f3n qu\u00edmica del acero 4140<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-615e907599e6602f6194f5f197ea2e44\">4140 steel is a Cr-Mo low alloy steel. Its <strong>composici\u00f3n qu\u00edmica<\/strong> includes carbon, chromium, molybdenum, manganese, silicon, phosphorus, and sulfur.<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th>Elemento<\/th><th>Gama t\u00edpica %<\/th><\/tr><\/thead><tbody><tr><td><strong>Carbono (C)<\/strong><\/td><td>0.38 - 0.43<\/td><\/tr><tr><td><strong>Cromo (Cr)<\/strong><\/td><td>0.80 - 1.10<\/td><\/tr><tr><td><strong>Molibdeno (Mo)<\/strong><\/td><td>0.15 - 0.25<\/td><\/tr><tr><td><strong>Manganeso (Mn)<\/strong><\/td><td>0.75 - 1.00<\/td><\/tr><tr><td><strong>Silicio (Si)<\/strong><\/td><td>0.15 - 0.35<\/td><\/tr><tr><td><strong>F\u00f3sforo (P)<\/strong><\/td><td>\u22640.035<\/td><\/tr><tr><td><strong>Azufre (S)<\/strong><\/td><td>\u22640.040<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-8123ff3bdfdaf924631e4d7855f190d9\"><strong>Funciones de los elementos:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-black-color has-text-color has-link-color wp-elements-e662db0ea77353edbe8c0938f4632f5f\"><strong>Carbono (C)<\/strong> \u2192 Aumenta la resistencia y la dureza.<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-049a112d2e4765ea714b855d6251295e\"><strong>Cromo (Cr)<\/strong> \u2192 Mejora la templabilidad y la resistencia al desgaste.<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-36fe6c64a4617e738116620b6bc78246\"><strong>Molibdeno (Mo)<\/strong> \u2192 Mejora la resistencia a altas temperaturas y la tenacidad.<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-44ff5becad621ef5fa5d92cb3ee26e54\"><strong>Manganeso (Mn)<\/strong> \u2192 Favorece la templabilidad y las propiedades de tracci\u00f3n.<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-7eaaa812989b9f26784c201dc59f42fd\"><strong>Silicio (Si)<\/strong> \u2192 A\u00f1ade resistencia y dureza.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-a32e1b690a251caa6595541f172932e6\">Estas caracter\u00edsticas elementales son fundamentales para entender c\u00f3mo <strong>4140 composition<\/strong> afecta a la respuesta del tratamiento t\u00e9rmico y al rendimiento mec\u00e1nico.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading has-black-color has-text-color has-link-color has-medium-font-size wp-elements-d7dc5ce79d1baf3789a55f9c5dd8aeee\"><strong>Propiedades mec\u00e1nicas del acero 4140<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-6f82a42e2aab9fd539970c453d0797d7\"><strong>Propiedades mec\u00e1nicas del acero 4140<\/strong> vary depending on the heat treatment condition. The following table summarizes typical <strong>tensile strength, yield strength, elongation, impact toughness, and hardness<\/strong> values:<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th>Tratamiento t\u00e9rmico<\/th><th>Resistencia a la tracci\u00f3n (MPa)<\/th><th>L\u00edmite el\u00e1stico (MPa)<\/th><th>Alargamiento (%)<\/th><th>Resistencia al impacto (J)<\/th><th>Dureza<\/th><\/tr><\/thead><tbody><tr><td><strong>Recocido<\/strong><\/td><td>655 - 785<\/td><td>415 - 585<\/td><td>20 - 25<\/td><td>35 - 45<\/td><td>~197 HB<\/td><\/tr><tr><td><strong>Normalizado<\/strong><\/td><td>710 - 850<\/td><td>470 - 630<\/td><td>18 - 22<\/td><td>40 - 50<\/td><td>~229 HB<\/td><\/tr><tr><td><strong>Templado y revenido<\/strong><\/td><td>835 - 1080<\/td><td>655 - 900<\/td><td>15 - 20<\/td><td>35 - 45<\/td><td>45 - 50 HRC<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-3cb734689180476d582a83f4ba15d858\"><strong>Por qu\u00e9 var\u00edan las propiedades:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-black-color has-text-color has-link-color wp-elements-875b2ddce153f135fdb68c7ee0899cdc\"><strong>Recocido<\/strong> \u2192 Disminuye la dureza para facilitar el mecanizado.<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-a75daef3aa80eaaec3c80b498a814412\"><strong>Normalizaci\u00f3n<\/strong> \u2192 Refina la estructura del grano, mejorando la tenacidad.<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-40b93e8fccd6d9e0ba3bceb0bc104dd1\"><strong>Temple y revenido<\/strong> \u2192 Alcanza una gran resistencia y dureza manteniendo una buena tenacidad.<\/li>\n<\/ul>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-f0fc79056766457ca818c3116f91d70b\"><strong>4140 l\u00edmite el\u00e1stico<\/strong> is an important parameter when evaluating load-bearing performance and selecting the appropriate material condition.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-65b443a5c67f7e9a31947e7361e07004\"><em>For detailed information about <strong><a href=\"https:\/\/www.cjmsteelgroup.com\/es\/4140-steel-overview.html\/\" target=\"_blank\" rel=\"noopener\" title=\"4140 steel heat treatment\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">4140 steel heat treatment<\/mark><\/a><\/strong>, including how different treatment conditions affect performance, refer to our complete guide.<\/em><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading has-black-color has-text-color has-link-color has-medium-font-size wp-elements-39b11817621dbe071a175de1a903364c\"><strong>4140 Steel Equivalent Grades<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-3808827050a9d8ece8b9ac918ffa7166\">When sourcing internationally, confirming the correct <strong>4140 steel equivalent material<\/strong> is important to ensure consistent performance.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-8576045af80dfc0d4849051f9f592303\">Common <strong>4140 steel equivalent grades<\/strong> incluyen:<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th>Pa\u00eds \/ Norma<\/th><th>Grado equivalente<\/th><\/tr><\/thead><tbody><tr><td><strong>EE.UU.<\/strong><\/td><td>AISI 4140 \/ SAE 4140<\/td><\/tr><tr><td><strong>ASTM<\/strong><\/td><td>A29 \/ A322<\/td><\/tr><tr><td><strong>Alemania<\/strong><\/td><td>DIN 42CrMo4<\/td><\/tr><tr><td><strong>Europa<\/strong><\/td><td>EN 1.7225<\/td><\/tr><tr><td><strong>Jap\u00f3n<\/strong><\/td><td>JIS SCM440<\/td><\/tr><tr><td><strong>China<\/strong><\/td><td>GB 42CrMo<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-36863498e3b5fc58db3242d9987a9f14\">Checking the correct <strong>4140 equivalent material<\/strong> helps buyers confirm chemical composition, mechanical requirements, and applicable standards before purchasing.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading has-black-color has-text-color has-link-color has-medium-font-size wp-elements-daf16da70ee293f4effcff64f14e6697\"><strong>4140 Steel Data Sheet<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-b6db56f831848951d6168106d4fa58ab\">The following technical data provides general reference values for <strong>4140 steel properties and specifications<\/strong>:<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table class=\"has-fixed-layout\"><thead><tr><th>Propiedad<\/th><th>Valor t\u00edpico<\/th><\/tr><\/thead><tbody><tr><td>Tipo de acero<\/td><td>Chromium-Molybdenum Alloy Steel<\/td><\/tr><tr><td>Densidad<\/td><td>7,85 g\/cm\u00b3<\/td><\/tr><tr><td>Elastic Modulus<\/td><td>205 GPa<\/td><\/tr><tr><td>Resistencia a la tracci\u00f3n<\/td><td>835 \u2013 1080 MPa<\/td><\/tr><tr><td>L\u00edmite el\u00e1stico<\/td><td>655 \u2013 900 MPa<\/td><\/tr><tr><td>Dureza<\/td><td>45 - 50 HRC<\/td><\/tr><tr><td>Melting Point<\/td><td>Approximately 1416\u00b0C<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-ceddc02ab1bf4409e3cc9f68185db1b2\">These values may vary depending on manufacturing conditions, heat treatment processes, and applicable standards.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading has-black-color has-text-color has-link-color has-medium-font-size wp-elements-27e61bbce4265602f5197705df7378f4\"><strong>Directrices de tratamiento<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-1af045b6cb26a1529b5b4e04c92c3f26\">Un tratamiento adecuado es esencial para mantener <strong>Propiedades del acero 4140<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-black-color has-text-color has-link-color wp-elements-04308d62fcee1550f175ca4700f5c29e\"><strong>Alivia el estr\u00e9s:<\/strong> Recomendado para componentes pesados para minimizar la tensi\u00f3n residual y la distorsi\u00f3n.<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-517b4552d15efc07d5fbccab08b1c89c\"><strong>Mecanizado:<\/strong> El acero 4140 recocido es m\u00e1s f\u00e1cil de mecanizar debido a su menor dureza; el acero normalizado o templado requiere herramientas de corte de mayor dureza.<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-3eb74e98fef75f3c4cbc79b371aa1f1e\"><strong>Tratamiento t\u00e9rmico:<\/strong> Ajustar la temperatura y la velocidad de enfriamiento en funci\u00f3n de la dureza y tenacidad requeridas. Asegurar un calentamiento uniforme para evitar distorsiones.<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-83519b814e448af645f3ee99aef4ad70\"><em>Comprender <strong><a href=\"https:\/\/www.cjmsteelgroup.com\/es\/4140-steel-overview.html\/\" target=\"_blank\" rel=\"noopener\" title=\"Aplicaciones del acero 4140\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">Aplicaciones del acero 4140<\/mark><\/a><\/strong> helps determine the appropriate machining and processing requirements for different components.<\/em><\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading has-black-color has-text-color has-link-color has-medium-font-size wp-elements-e77b192da2fb5af5d81b88337a9d9c23\"><strong>Consideraciones sobre la soldadura<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-fd5dd06993bed3c1973e8d7419eabcc6\">Una soldadura adecuada garantiza el rendimiento y evita el agrietamiento:<\/p>\n\n\n\n<ul class=\"wp-block-list has-black-color has-text-color has-link-color wp-elements-42db4d50181346cf7babfa78f391ad52\">\n<li class=\"has-black-color has-text-color has-link-color wp-elements-41c312488d91c10bb9500e962fc0841a\"><strong>Precalentamiento:<\/strong> 150-200\u00b0C para piezas de m\u00e1s de 12 mm de espesor<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-ccc72e52d51cf3923de52588275245f6\"><strong>M\u00e9todos de soldadura:<\/strong> SMAW, GMAW, GTAW adecuado para acero 4140<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-2746f178af632526588ef900df70836b\"><strong>Material de relleno:<\/strong> Utilizar rellenos de acero de baja aleaci\u00f3n compatibles (por ejemplo, ER80S-D2).<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-3d50a3cad1aaa72b2419ab699bd2ebba\"><strong>Tratamiento t\u00e9rmico posterior a la soldadura:<\/strong> Se recomienda el alivio de tensiones o el revenido despu\u00e9s de la soldadura para mantener la tenacidad<\/li>\n<\/ul>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-d99ae02e2f43e1c63c9154ef085f2378\">Estas pr\u00e1cticas de procesado y soldadura ayudan a mantener el <strong>Propiedades del acero 4140<\/strong>Garantizar una calidad homog\u00e9nea en las distintas operaciones de fabricaci\u00f3n.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading has-black-color has-text-color has-link-color has-medium-font-size wp-elements-5fcffaa264d9ef053beb778024ad67b5\"><strong>4140 Steel Products<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-a2300e593111b20a0155cc2e0a4e64e8\">Suministros de acero CJM <strong>4140 steel products<\/strong> for industrial applications, including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong><a href=\"https:\/\/www.cjmsteelgroup.com\/es\/4135-4140-4142-6150-alloy-plate-en10083-3.html\/\" target=\"_blank\" rel=\"noopener\" title=\"4140 steel plate\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">4140 steel plate<\/mark><\/a><\/strong><\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.cjmsteelgroup.com\/es\/aisi-sae-4140-alloy-steel-bar.html\/\" target=\"_blank\" rel=\"noopener\" title=\"AISI\/SAE 4140 alloy steel bar\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">AISI\/SAE 4140 alloy steel bar<\/mark><\/a><\/strong><\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.cjmsteelgroup.com\/es\/4140-steel-tube.html\/\" target=\"_blank\" rel=\"noopener\" title=\"4140 steel tube\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">4140 steel tube<\/mark><\/a><\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-12f72e6456eac7412ea0c662e626866a\">Products can be supplied with required specifications, cutting services, and quality documentation including Mill Test Certificates.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading has-black-color has-text-color has-link-color has-medium-font-size wp-elements-c25fa8ef894e24eccbadd70ffab5fc79\"><strong>Conclusi\u00f3n<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-70b5fe5e24dbeb1d673fc1cf61ef44ff\">4140 steel selection depends on <strong>chemical composition, mechanical properties, equivalent grades, and applicable technical requirements<\/strong>.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-2c2f36c1fe4533b67e09572f2ba81f97\">Comprender <strong>Propiedades del acero 4140<\/strong>, technical data, and applicable standards helps buyers select the correct material for demanding industrial applications.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-a184e09180a32703c400424c98e21adc\"><em>For specific requirements or further technical information, please <a href=\"https:\/\/www.cjmsteelgroup.com\/es\/contact-us.html\/\" target=\"_blank\" rel=\"noopener\" title=\"P\u00f3ngase en contacto con nosotros\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\"><strong>Contacto<\/strong><\/mark><\/a> to discuss your needs.<\/em><\/p>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Introduction This guide covers 4140 steel properties, including chemical composition, mechanical properties, yield strength, equivalent grades, and key technical data, with processing and welding considerations for industrial applications. 4140 Steel Chemical Composition 4140 steel is a Cr-Mo low alloy steel. Its chemical composition includes carbon, chromium, molybdenum, manganese, silicon, phosphorus, and sulfur. Element Typical % [&hellip;]<\/p>","protected":false},"author":1,"featured_media":7326,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"themepark_post_bcolor":"#f5f5f5","themepark_post_width":"1022px","themepark_post_img":"","themepark_post_img_po":"left","themepark_post_img_re":false,"themepark_post_img_cover":false,"themepark_post_img_fixed":false,"themepark_post_hide_title":false,"themepark_post_main_b":"","themepark_post_main_p":100,"themepark_paddingblock":false,"footnotes":""},"categories":[6],"tags":[],"class_list":["post-7325","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"metadata":{"_edit_lock":["1790759171:1"],"_thumbnail_id":["7326"],"_edit_last":["1"],"_aioseo_title":["4140 Steel Properties, Composition &amp; Equivalent Grades"],"_aioseo_description":["Technical data for 4140 steel including chemical composition, yield strength, mechanical properties, equivalent grades, and key specifications."],"_aioseo_keywords":[""],"_aioseo_og_title":[null],"_aioseo_og_description":[null],"_aioseo_og_article_section":[""],"_aioseo_og_article_tags":[""],"_aioseo_twitter_title":[null],"_aioseo_twitter_description":[null],"themepark_seo_title":["4140 Steel Properties, Composition & Equivalent Grades"],"themepark_seo_description":["Technical data for 4140 steel including chemical composition, yield strength, mechanical properties, equivalent grades, and key specifications."],"themepark_seo_keyword":["4140 steel chemical composition, 4140 steel mechanical properties, 4140 steel yield strength, 4140 steel equivalent material"],"catce":["sidebar-widgets4"],"views":["15687"],"_wp_old_date":["2025-09-22","2025-10-22","2026-09-10"],"_canshu":["a:5:{i:0;a:5:{s:5:\"title\";s:6:\"Origin\";s:4:\"text\";s:5:\"China\";s:2:\"f1\";s:0:\"\";s:2:\"f2\";s:0:\"\";s:2:\"f3\";s:0:\"\";}i:1;a:4:{s:5:\"title\";s:13:\"Delivery Time\";s:4:\"text\";s:9:\"\u22657 days\";s:2:\"f3\";b:0;s:2:\"f1\";i:16;}i:2;a:4:{s:5:\"title\";s:6:\"Demand\";s:4:\"text\";s:12:\"Customizable\";s:2:\"f3\";b:0;s:2:\"f1\";i:16;}i:3;a:2:{s:5:\"title\";s:8:\"Standard\";s:4:\"text\";s:28:\"ASTM, AISI, JIS, GB, DIN, EN\";}i:4;a:2:{s:5:\"title\";s:3:\"MOQ\";s:4:\"text\";s:6:\" 1 Ton\";}}"]},"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO Pro 4.6.0 - aioseo.com -->\n\t\t<meta name=\"description\" content=\"Technical data for 4140 steel including chemical composition, yield strength, mechanical properties, equivalent grades, and key specifications.\" \/>\n\t\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t\t<link rel=\"canonical\" href=\"https:\/\/www.cjmsteelgroup.com\/es\/4140-steel-technical-guide.html\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO Pro (AIOSEO) 4.6.0\" \/>\n\t\t<meta property=\"og:locale\" content=\"es_ES\" \/>\n\t\t<meta property=\"og:site_name\" content=\"CJM Steel Group Ltd. -\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"4140 Steel Properties, Composition &amp; 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