stainless steel 321

321 stainless steel is Ni-Cr-Ti austenitic stainless steel, its performance is very similar to 304, but because of the addition of titanium, it has better resistance to grain boundary corrosion and high temperature strength. The formation of chromium carbide is effectively controlled by the addition of metallic titanium.Ti is stainless steel as a stabilizing element exists, it is hot strong steel at high temperature is much better than 316L.321 stainless steel organic acid and inorganic acid in different concentration and different temperature, especially has good resistance to abrasion performance in oxidizing medium, used in the manufacture of wear and wear acid container equipment lining, pipeline.                           

321 stainless steel has excellent high temperature stress rupture (Stress, Rupture) performance and high temperature creep resistance (Creep, Resistance), stress and mechanical properties are better than 304 stainless steel.                     

Cr:17-19  Ni:9-12  Ti:5C-0.70  C:0.08  Si:1.00  Mn:2.00  P:0.045  S:0.03

321 stainless steel is a high grade stainless steel in the 300 series, because the nickel content is relatively high. The utility model is applied to the outdoor machine of chemical, coal and petroleum industry with high grain boundary corrosion resistance, heat resistant parts of building materials and difficult parts of heat treatment, such as:

1) oil waste gas pipeline

2) engine exhaust pipe

3) boiler shell, heat exchanger, heating furnace parts

4) Noise components of 4 diesel engine

5) boiler pressure vessel

6) chemical transport vehicles

7) expansion joint

8) Spiral welded pipe for furnace pipe and dryer