What is UNS S30400? This grade of steel is an austenitic stainless steel. It is the most common grade of stainless steel, offered in an extensive types of variants, forms and surface finishes than any other type of stainless steel. What is ASTM A240 / A240M? It is an American standard for Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications. UNS S30400 is referred in ASTM A240 as 304 grade steel. Why S30400 called Alloy 304 Stainless Steel? Alloy 304 is a common market name for UNS S30400. Many international
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