{"id":69714,"date":"2026-05-17T17:27:45","date_gmt":"2026-05-17T17:27:45","guid":{"rendered":"https:\/\/evgroupchina.com\/encyclopedia-of-metal\/gb-t-4237\/"},"modified":"2026-05-19T15:30:40","modified_gmt":"2026-05-19T15:30:40","slug":"gb-t-4237","status":"publish","type":"wiki","link":"https:\/\/evgroupchina.com\/en\/encyclopedia-of-metal\/gb-t-4237\/","title":{"rendered":"GB\/T 4237"},"content":{"rendered":"<h2>1. Scope of the Standard<\/h2>\n<p>This specification establishes comprehensive technical requirements, classification criteria, methods for geometry and mass inspection, as well as testing and certification protocols for hot-rolled stainless steel products. The document regulates requirements for heavy plate, wide strip, sheets obtained from coil slitting, and narrow strips made of corrosion-resistant steels supplied by EV Group China.<\/p>\n<h2>2. Normative References<\/h2>\n<p>The application of this standard requires compliance with the provisions of the following normative documents, which establish methods for composition analysis, mechanical testing, and quality control:<\/p>\n<ul class=\"list-unstyled\">\n<li><b>GB\/T 222<\/b> \u2013 Permissible deviations for the chemical composition of steel products.<\/li>\n<li><b>GB\/T 223.3\u2013223.69<\/b> \u2013 Complex methods of chemical analysis (photometric, gravimetric, and spectrometric analysis of alloying elements, impurities, and gases).<\/li>\n<li><b>GB\/T 228.1<\/b> \u2013 Tensile testing method at room temperature.<\/li>\n<li><b>GB\/T 230.1 \/ 231.1 \/ 4340.1<\/b> \u2013 Standardized methods for Rockwell, Brinell, and Vickers hardness determination.<\/li>\n<li><b>GB\/T 232<\/b> \u2013 Bend testing of metallic materials.<\/li>\n<li><b>GB\/T 247<\/b> \u2013 Rules for marking, packaging, and product certification.<\/li>\n<li><b>GB\/T 709-2006<\/b> \u2013 Dimensions, mass, and shape tolerances for hot-rolled steel products.<\/li>\n<li><b>GB\/T 2975<\/b> \u2013 Preparation of test pieces for mechanical testing.<\/li>\n<li><b>GB\/T 4334<\/b> \u2013 Methods for intergranular corrosion resistance inspection.<\/li>\n<li><b>GB\/T 6394<\/b> \u2013 Methodology for grain size evaluation.<\/li>\n<li><b>GB\/T 8170<\/b> \u2013 Rules for rounding off numerical values.<\/li>\n<li><b>GB\/T 11170<\/b> \u2013 Spectrometric method for chemical composition analysis.<\/li>\n<li><b>GB\/T 17505<\/b> \u2013 General delivery conditions for steel products.<\/li>\n<li><b>GB\/T 20066<\/b> \u2013 Sampling procedures for composition analysis.<\/li>\n<li><b>GB\/T 20123 \/ 20124<\/b> \u2013 Determination of carbon, sulfur, and nitrogen content in metals.<\/li>\n<li><b>GB\/T 20878-2007<\/b> \u2013 Classification and chemical composition of stainless and heat-resistant steels.<\/li>\n<\/ul>\n<h2>3. Classification and Designations<\/h2>\n<h3>3.1 Edge Condition<\/h3>\n<ul>\n<li><b>EC<\/b> \u2013 Edge cut;<\/li>\n<li><b>EM<\/b> \u2013 Edge mill (uncut).<\/li>\n<\/ul>\n<h3>3.2 Manufacturing Precision<\/h3>\n<ul>\n<li><b>PT.A<\/b> \u2013 Normal thickness precision;<\/li>\n<li><b>PT.B<\/b> \u2013 High thickness precision;<\/li>\n<li><b>PF.A<\/b> \u2013 Standard flatness precision;<\/li>\n<li><b>PF.B<\/b> \u2013 High flatness precision.<\/li>\n<\/ul>\n<h2>4. Ordering Requirements<\/h2>\n<p>When submitting an order to EV Group China, the following parameters must be specified:<\/p>\n<ul>\n<li>Number of the current standard;<\/li>\n<li>Product nomenclature (sheet, strip, coil);<\/li>\n<li>Steel grade or corresponding digital codes;<\/li>\n<li>Exact dimensions and required precision class;<\/li>\n<li>Total mass or quantity of product units;<\/li>\n<li>Type of surface finish;<\/li>\n<li>Requirements for edge conditions.<\/li>\n<\/ul>\n","protected":false},"featured_media":0,"template":"","meta":[],"wiki_category":[119],"class_list":["post-69714","wiki","type-wiki","status-publish","hentry","wiki_category-gb"],"_links":{"self":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki\/69714","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\/69714\/revisions"}],"wp:attachment":[{"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/media?parent=69714"}],"wp:term":[{"taxonomy":"wiki_category","embeddable":true,"href":"https:\/\/evgroupchina.com\/en\/wp-json\/wp\/v2\/wiki_category?post=69714"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}