321 Stainless Steel is an austenitic steel similar to Grade 304 but with a titanium addition of at least five times the carbon content. This prevents carbide precipitation. This alloy has excellent resistance to oxidation, corrosion with good creep strength.
Grade 3221 is not heat treatable.
UNS S32100, ASTM A-240/240M, AMS 5510, AMS 5645, ASME SA-240, ASME SA-312, ASME SA-479, ASTM A-276 Condition A, , ASTM A-276 Condition S, ASTM A-479, QQ-S-763, QQ-S-766D.
Aircraft exhaust manifolds, annealing covers, stack lines, boiler casings, jet aircraft components, thermal oxidizers, refinery equipment, high temperature checmical process equipment, welded presser vessels, expansion joints, bellows, furnace parts, heating element tubing, heat exchangers, spiral welded tube for burner pups and flues,