{"id":8084,"date":"2026-04-27T16:29:57","date_gmt":"2026-04-27T08:29:57","guid":{"rendered":"https:\/\/www.cjmsteelgroup.com\/?p=8084"},"modified":"2026-05-07T16:47:36","modified_gmt":"2026-05-07T08:47:36","slug":"astm-a36-vs-jis-ss400-structural-steel-differences-and-equivalency","status":"publish","type":"post","link":"https:\/\/www.cjmsteelgroup.com\/es\/astm-a36-vs-jis-ss400-structural-steel-differences-and-equivalency.html","title":{"rendered":"ASTM A36 vs SS400: Key Differences, Properties and Substitution Guide"},"content":{"rendered":"<h2 class=\"wp-block-heading has-black-color has-text-color has-link-color has-medium-font-size wp-elements-c8c0794d67ea7f2ea65db98e11f93dfd\"><strong>Introduction to A36 and SS400<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-00c205510dc90fa4d316f58022d17d31\"><strong>ASTM A36 vs SS400<\/strong> is one of the most common comparisons in global structural steel sourcing and engineering design.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-0e6f7540d6a68b1a5beea5194c6f7e28\">ASTM A36 and SS400 are both widely used mild structural steels, but they are defined under different standards and follow different performance philosophies. ASTM A36 is commonly specified in North America and international projects, while SS400 is widely used in Asian construction and fabrication.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-9a237b6393f4119ad18f5e24ba4855d3\">Esta gu\u00eda ofrece una descripci\u00f3n detallada <strong>comparison of ASTM A36 vs SS400<\/strong>, focusing on differences in mechanical properties, standards, and whether SS400 can replace ASTM A36 in real engineering applications.<\/p>\n\n\n\n<p><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"400\" src=\"https:\/\/www.cjmsteelgroup.com\/wp-content\/uploads\/2026\/02\/a36-vs-ss400-structural-steel-standards.jpg\" alt=\"ASTM A36 vs SS400 structural steel standards and applications\" class=\"wp-image-8088\" srcset=\"https:\/\/www.cjmsteelgroup.com\/wp-content\/uploads\/2026\/02\/a36-vs-ss400-structural-steel-standards.jpg 600w, https:\/\/www.cjmsteelgroup.com\/wp-content\/uploads\/2026\/02\/a36-vs-ss400-structural-steel-standards-300x200.jpg 300w, https:\/\/www.cjmsteelgroup.com\/wp-content\/uploads\/2026\/02\/a36-vs-ss400-structural-steel-standards-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><figcaption class=\"wp-element-caption\">ASTM A36 and JIS SS400 structural steel comparison in engineering applications<\/figcaption><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading has-black-color has-text-color has-link-color has-medium-font-size wp-elements-ab485b16ff7fdbc6a69a35ba178d1f6c\"><strong>ASTM A36 vs SS400: Standard Differences (ASTM vs JIS)<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-fe9ea1fbd5368af2e5afc994a5cf9fa2\">Understanding the standard systems behind <strong>A36 vs SS400<\/strong> is essential for accurate material selection.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-a54b5d74597d746e72bcd3040ec1d0a7\"><strong>ASTM A36<\/strong> is governed by ASTM International. The standard clearly defines minimum mechanical properties, especially yield strength, regardless of thickness. This makes ASTM A36 highly reliable in engineering calculations and inspection processes. <strong>SS400<\/strong> is specified under JIS G 3101 for general structural use. Unlike ASTM A36, it does not define a fixed minimum yield strength. Instead, performance is based on typical manufacturing practice and varies depending on thickness.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-a85ab3a2263212df9b404fd5e35b8b6f\">This difference explains why the <strong>difference between A36 and SS400<\/strong> is not just about strength values, but about <strong>standard definition and verification reliability<\/strong>.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><em>For projects involving European standards, a detailed comparison can be found in our guide on <strong><a href=\"https:\/\/www.cjmsteelgroup.com\/es\/astm-a36-vs-en-s235jr.html\/\" target=\"_blank\" rel=\"noopener\" title=\"ASTM A36 vs EN S235JR\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">ASTM A36 vs EN S235JR<\/mark><\/a><\/strong>, which explains differences in strength, standard systems, and application scenarios.<\/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-ac3d06ccd34b052bcd22f5b87c3e8eb6\"><strong>ASTM A36 vs SS400 Yield Strength and Mechanical Properties<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-2e339051fbd09f46bb5464917332ee2e\">Al comparar <strong>ASTM A36 vs SS400<\/strong>, yield strength is the most critical parameter.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-black-color has-text-color has-link-color wp-elements-949dcfdcb0aae7510a584e15880e5f70\"><strong>ASTM A36<\/strong>\n<ul class=\"wp-block-list\">\n<li class=\"has-black-color has-text-color has-link-color wp-elements-b70d2250efa4e00896a7b9e48aca904d\">Minimum yield strength: <strong>250 MPa (36 ksi)<\/strong> for thickness up to 200 mm<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-c1b6d917b49aae5eb1436919356462ef\">Tensile strength: 400\u2013550 MPa<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-1194edfc53ffd7b801f2369b4ed0b278\"><strong>SS400<\/strong>\n<ul class=\"wp-block-list\">\n<li class=\"has-black-color has-text-color has-link-color wp-elements-4e70e95872c0d965369ca65fc4626ba0\">Yield strength: <em>not specified in JIS G 3101<\/em><\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-e98d21c89065c1bb9adadb407412bea1\">Common mill practice:\n<ul class=\"wp-block-list\">\n<li class=\"has-black-color has-text-color has-link-color wp-elements-4e77727a887648ca063e43f9ddfb2668\">\u2264 16 mm: approximately 245 MPa<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-1101813c32c0a5ff38c141b25e0b90e4\">16\u201340 mm: approximately 235 MPa<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-e89f138bacbb334cf92192ef299bcf60\">40 mm: may be lower depending on rolling practice<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Tensile strength: 400\u2013510 MPa<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-cab787bc03084d8af84e5675f946ef28\">La clave <strong>a36 vs ss400 difference<\/strong> is that ASTM A36 guarantees a minimum yield strength, while SS400 relies on typical production values.<\/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-b98bfb98f7180cc9d5cb9ff52401b8b4\"><strong>Thickness Effect in ASTM A36 vs SS400 Performance<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-2cbe8e00f8d67156b447d4d2db83be91\">Thickness plays an important role in the <strong>comparison of ASTM A36 vs SS400<\/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-854eba80f8322af60d334183ec5e6dc9\">In thinner sections, SS400 often performs similarly to mild structural steel expectations. However, as thickness increases:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-black-color has-text-color has-link-color wp-elements-a53ce6ac994748a76103dff0873a6be8\">Yield strength may decrease<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-4b80f29b125b2209d399964ebf8013ef\">Property variation between mills becomes more noticeable<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-80b79055583a47dfecfcada7a76f9365\">Reliance on actual mill test certificates becomes essential<\/li>\n<\/ul>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-b10fca952e71e9bb9b7f574a61ccc2f5\">In contrast, ASTM A36 maintains a defined minimum yield strength across thickness ranges, which improves consistency and reduces uncertainty in engineering applications.<\/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-76d0478fecf82590f7cfa405c00e6161\"><strong>Is SS400 Equivalent to ASTM A36?<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-5706c09e1863f63e7a9a82519fc87d73\">A common question in <strong>A36 vs SS400 comparison<\/strong> is whether SS400 equivalent to ASTM A36.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-c668cc31b045691ba06b6c62f3a45fbc\">In practice, SS400 is often considered a comparable or alternative material, but there is no direct SS400 equivalent defined in ASTM standards.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-74bd2d0ee128051d5805e87eac0c1893\">While their tensile strength ranges are similar, differences in yield strength definition and standard requirements mean they cannot be treated as interchangeable without verification.<\/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-f7ffe367f1f23b65f5f82c497e3d2f88\"><strong>Common Applications in Construction and Fabrication<\/strong><\/h2>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"400\" src=\"https:\/\/www.cjmsteelgroup.com\/wp-content\/uploads\/2026\/02\/a36-ss400-structural-steel-applications-construction.jpg\" alt=\"ASTM A36 and SS400 structural steel applications in building frames and industrial structures\" class=\"wp-image-8089\" srcset=\"https:\/\/www.cjmsteelgroup.com\/wp-content\/uploads\/2026\/02\/a36-ss400-structural-steel-applications-construction.jpg 600w, https:\/\/www.cjmsteelgroup.com\/wp-content\/uploads\/2026\/02\/a36-ss400-structural-steel-applications-construction-300x200.jpg 300w, https:\/\/www.cjmsteelgroup.com\/wp-content\/uploads\/2026\/02\/a36-ss400-structural-steel-applications-construction-18x12.jpg 18w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><figcaption class=\"wp-element-caption\">ASTM A36 and JIS SS400 structural steel used in construction and industrial fabrication projects<\/figcaption><\/figure><\/div>\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-4d3163a45b2507bb369e7ee01791f31f\"><strong>Both ASTM A36 and SS400 are widely used in:<\/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-13f1d300dc60c7cd40d224734495759e\">Structural beams and columns<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-dc327bba07f6f3f8d2a96e2bb2207a41\">Placas base y soportes<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-58ca842c46f01226615e5ae8f7d67b62\">Welded frames and supports<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-6f7da283f9aaf41cdc8a35060549d09d\">General fabrication and machining<\/li>\n<\/ul>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-9ac00cf961d1ea846fe5a532228b76c6\"><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-232ede8b739929c4616d9ed3fc3361f0\"><strong>From a usage perspective:<\/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-79c4b49596857b48cbd7313a211548a4\">SS400 is more common in local construction projects under JIS standards<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-1e12996b3fe3f31653c091b9ecab4f53\">ASTM A36 is more widely used in international and export-oriented engineering<\/li>\n<\/ul>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-f32a1538522d0a08bfb7e9c77082217e\">Both materials offer good weldability due to low carbon content, making them suitable for general structural fabrication.<\/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-5ecebfa823e7d7cc19a70ee7f62bf051\"><strong>When to Choose ASTM A36 vs SS400 in Engineering Projects<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-40a31a6228946266c062b2cab6071995\">Elegir entre <strong>ASTM A36 vs SS400<\/strong> depends on project requirements and engineering standards.<\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-d11de27b06cdcac87297385b64592b35\"><strong>ASTM A36 is preferred when:<\/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-7e79ecfe7943e9eb0e38e3fd084fc0a6\">Projects follow ASTM or international standards<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-ee6a62c539f1d40f5eedd5489a8a0ffc\">Third-party inspection is required<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-c65094f6124f9a744302c758729e1c0e\">Structural reliability must be clearly defined<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-8257e919e37285720425390dd8f6d3d5\">Export or EPC projects are involved<\/li>\n<\/ul>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-929c32fd3319979501d296e65fdb5190\"><strong>SS400 may be used when:<\/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-97fa2dfd151e0b8e3bd2b61abac8a45c\">Projects are based on JIS standards<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-6e6153b4f7d209926a735c969c004d9e\">Structural requirements are not critical<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-b0c1a830172bead1907dd9a15051a33e\">Thickness is within lower ranges<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-e6e98674d8b7b346f2276aeb14a47795\">Mechanical properties are verified by mill test reports<\/li>\n<\/ul>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-802da594270b7eefc43274c6a7038a4c\">This reflects the real-world <strong>decision logic behind A36 vs SS400 selection<\/strong>.<\/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-f96afb0ee63a5a39f084ee0a6af4b3e1\"><strong>Can SS400 Replace ASTM A36 in Structural Applications?<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-e97167e06b5568f342bacd3a952a6cd2\">The question of substitution is central to <strong>astm a36 vs ss400<\/strong> discussions.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-852927d4912531fe4fddf0eb4988d068\"><strong>SS400 can sometimes be used as a substitute under controlled conditions:<\/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-c318bdcfe59397d3f8b423dc6edc82a6\">Non-critical structural applications<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-ed602735efa77c7934a991052786a332\">Verified mechanical properties<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-4b5754ecebd1d3affd24f10c78d455b3\">Engineering approval<\/li>\n<\/ul>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-550bf3ff61c4c6d43a3b7998179a362a\"><strong>However, risks include:<\/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-8816a29373205c866fc991486d5d64ce\">Lower or inconsistent yield strength in thicker materials<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-adb37f62ee6b602e3b8051dfb652b603\">Potential rejection during inspection<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-8813cba31abb88716595d74472e039f8\">Non-compliance with ASTM-based specifications<\/li>\n<\/ul>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-36187e4cefb29e0f8a2439dae591ce97\">In engineering practice, SS400 should be treated as a <strong>conditionally comparable material<\/strong>, not a direct replacement.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p><em>You can refer to our comparison of <a href=\"https:\/\/www.cjmsteelgroup.com\/es\/astm-a36-vs-q235b-differences-equivalency-risks.html\/\" target=\"_blank\" rel=\"noopener\" title=\"ASTM A36 vs Q235B\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\"><strong>ASTM A36 vs Q235B<\/strong><\/mark><\/a> to understand equivalency considerations, performance differences, and potential project risks when substituting materials across standards.<\/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-c25fa8ef894e24eccbadd70ffab5fc79\"><strong>Conclusi\u00f3n<\/strong><\/h2>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-d8467b1a869b1a272a6a341480a77a76\">En <strong>difference between A36 and SS400<\/strong> is primarily defined by:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-black-color has-text-color has-link-color wp-elements-61cdd5f8215e7a082fd519e81957217e\">Yield strength definition<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-c9daad72e55ec251c0e5e6918edd3ff1\">Thickness sensitivity<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-4b81898c7a375151fe912e2d3b57af38\">Standard enforcement philosophy<\/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-d5c33018860b2a24e49861057762ed88\">ASTM A36 provides clear mechanical guarantees and broader international acceptance. SS400 is widely used in regional markets but requires careful verification when used as a substitute.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<p class=\"has-black-color has-text-color has-link-color wp-elements-5d696f3e6f6fdcd6344308323aa68a93\">For any project, material selection should be based on <strong>certified data and engineering approval<\/strong>, not on nominal similarity.<\/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-8be199b2a9cb1c9cee2eda1e35857a76\"><strong>Preguntas frecuentes<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li class=\"has-black-color has-text-color has-link-color wp-elements-6d28a37470ec3e3e1b283990947753d0\"><strong>Q1: Is SS400 equivalent to ASTM A36?<\/strong><br>A: SS400 is <strong>not officially equivalent<\/strong> to ASTM A36. While their tensile strength ranges are similar, SS400 does not guarantee a minimum yield strength in the standard.<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-caa63644e9424cc84fdccdc5103f5193\"><strong>Q2: What is the difference between ASTM A36 and SS400?<\/strong><br>A: The main <strong>difference between A36 and SS400<\/strong> is that ASTM A36 defines a minimum yield strength, while SS400 does not.<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-fd138aaac71e771c9ac3cf905a20be45\"><strong>Q3: Can SS400 replace ASTM A36?<\/strong><br>A: SS400 can be used in limited cases if mechanical properties are verified and approved by engineers.<\/li>\n\n\n\n<li class=\"has-black-color has-text-color has-link-color wp-elements-686bce40b0065769c5556f28b0adce88\"><strong>Q4: Why is SS400 yield strength not fixed?<\/strong><br>A: Because the JIS standard relies on manufacturing practice rather than fixed minimum requirements.<\/li>\n<\/ul>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>Introduction to A36 and SS400 ASTM A36 vs SS400 is one of the most common comparisons in global structural steel sourcing and engineering design. ASTM A36 and SS400 are both widely used mild structural steels, but they are defined under different standards and follow different performance philosophies. ASTM A36 is commonly specified in North America [&hellip;]<\/p>","protected":false},"author":1,"featured_media":8089,"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-8084","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"metadata":{"_edit_lock":["1778144153:1"],"_edit_last":["1"],"_aioseo_title":["ASTM A36 vs SS400: Yield Strength, Equivalent &amp; Substitution"],"_aioseo_description":["ASTM A36 vs SS400: compare yield strength, standards and performance. Is SS400 equivalent to A36? 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