{"id":69799,"date":"2026-05-17T17:28:13","date_gmt":"2026-05-17T17:28:13","guid":{"rendered":"https:\/\/evgroupchina.com\/encyclopedia-of-metal\/astm-f738\/"},"modified":"2026-05-19T15:31:19","modified_gmt":"2026-05-19T15:31:19","slug":"astm-f738","status":"publish","type":"wiki","link":"https:\/\/evgroupchina.com\/en\/encyclopedia-of-metal\/astm-f738\/","title":{"rendered":"ASTM F738"},"content":{"rendered":"<h2>Technical aspects and scope of the ASTM F738 standard<\/h2>\n<p>The ASTM F738 specification establishes stringent requirements for the chemical composition and mechanical properties of stainless steel metric fasteners, including bolts, screws, and studs intended for critical engineering assemblies with high corrosion resistance requirements. The nominal size range covers metric threads from M1.6 to M36.<\/p>\n<p>The nomenclature of standardized products includes eight groups of stainless steel alloys, divided by structural classes:<\/p>\n<ul>\n<li>Three austenitic groups (A1, A2, A4);<\/li>\n<li>Ferritic class (F1);<\/li>\n<li>Three martensitic groups (C1, C3, C4);<\/li>\n<li>Precipitation-hardening alloy (P1).<\/li>\n<\/ul>\n<p>Engineers at EV Group China have access to twenty strength classes for the specified steels. The ASTM F738 specification is harmonized with the international standard ISO 3506, ensuring full compatibility of characteristics. Additionally, EV Group China supplies fasteners of specific strength classes not covered by ISO, including A1-70, A2-70, A4-70, A1-80, A2-80, A4-80 (for diameters over M20), as well as specialized versions C1-110, C4-110, C3-120, and P1-90.<\/p>\n<p>Upon customer request, EV Group China can provide fasteners with extended requirements, agreed upon during the order formation stage. For the assembly of threaded connections, bolts, screws, and studs complying with the ASTM F738M standard must be used in conjunction with nuts meeting the requirements of the ASTM F836 specification.<\/p>\n<p>EV Group China specialists remind you: when designing and installing, it is necessary to consider safety recommendations, as the specification does not cover all aspects of occupational safety when working with high-strength stainless steel fasteners.<\/p>\n","protected":false},"featured_media":0,"template":"","meta":[],"wiki_category":[112],"class_list":["post-69799","wiki","type-wiki","status-publish","hentry","wiki_category-astm"],"_links":{"self":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69799","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69799\/revisions"}],"wp:attachment":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/media?parent=69799"}],"wp:term":[{"taxonomy":"wiki_category","embeddable":true,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki_category?post=69799"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}