Explore ASTM A182 F347 Stainless Steel Flange with detailed specifications, material properties, and chemical composition for high demand ap
ASTM A182 F347 is a niobium-stabilized austenitic stainless steel grade used for manufacturing forged flanges, fittings, valves, bars, and other pressure-bearing components that require excellent corrosion resistance, mechanical strength, and heat-resistance. It belongs to the ASTM A182 / ASME SA182 specification, covering forged and machined pressure parts for high-temperature service.
Grade F347 (UNS S34700) is similar in composition to SS 304 but contains niobium (columbium) which stabilizes the structure against intergranular corrosion after exposure to elevated temperatures — especially in the range where chromium carbide precipitation could occur. This makes it ideal for welded assemblies and high-heat service applications.