Type 321 is an electric furnace processed austenitic stainless steel. It is non heat treatable and non-magnetic in the annealed condition. This alloy contains 18% chromium, 8% nickel and a substantial addition of titanium. The titanium forms an insoluble and stable carbide which ties up all the carbon in the alloy and therefore prevents it from precipitating as chromium carbide. This leave the chromium is solution to resist corrosion to a very high degree. This extremely beneficial in application of temperatures ranging from 800#F to 1600#F. as it eliminates the necessity for reannealing after fabrication.
Applications :
Type 321 is used prinicipally for application involving welding or sustained elevated temperature operations where reannealing is not practical. It is used extensively in the aircraft and missile industries for engine parts, hear exchanges, exhaust stacks, rocket engines, manifolds and etc.
Corrosion Resistance :
This alloy is extremely resistant to intergranular corrosion and has very good corrosion resistance in weld areas. It has slightly less corrosion resistance to atmospheric conditions than Type 302 of Type 304 in the annealed condition.

Type 321 is an electric furnace processed austenitic stainless steel. It is non heat treatable and non-magnetic in the annealed condition. This alloy contains 18% chromium, 8% nickel and a substantial addition of titanium. The titanium forms an insoluble and stable carbide which ties up all the carbon in the alloy and therefore prevents it from precipitating as chromium carbide. This leave the chromium is solution to resist corrosion to a very high degree. This extremely beneficial in application of temperatures ranging from 800#F to 1600#F. as it eliminates the necessity for reannealing after fabrication.
Applications :
Type 321 is used prinicipally for application involving welding or sustained elevated temperature operations where reannealing is not practical. It is used extensively in the aircraft and missile industries for engine parts, hear exchanges, exhaust stacks, rocket engines, manifolds and etc.
Corrosion Resistance :
This alloy is extremely resistant to intergranular corrosion and has very good corrosion resistance in weld areas. It has slightly less corrosion resistance to atmospheric conditions than Type 302 of Type 304 in the annealed condition.