Chemical composition and application range of stainless steel 321
Release Time:2019 07 10
  • HAOSTEEL GROUP CO., LIMITED
  • Address : A1010, No.581 Xiuchuan road, Pudong new area, Shanghai  201299, China
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321 stainless steel of Ti as a stabilizing element exists, but it is also a hot steel, in terms of high temperature is better than 316 l. 321 stainless steel in different concentration and temperature of organic acid and inorganic acid, especially in oxidizing medium has good abrasion resistance, used in the manufacture of the lining of wear resistant acid containers and equipment and pipelines.


321 stainless steel is ni-cr-ti austenitic stainless steel, its performance is very similar to 304, but because of the addition of titanium metal, it has better grain boundary corrosion resistance and high temperature strength.

Due to the addition of titanium, the formation of chromium carbide is effectively controlled.


The Stress Rupture and Creep Resistance of 321 stainless steel are respectively higher than 304 stainless steel.


It is used for outdoor machines in chemical, coal and petroleum industries with high resistance to grain boundary corrosion


1. Petroleum exhaust combustion pipeline


2. Engine exhaust pipe


Boiler shell, heat exchanger, heater parts


4. Silencing components for diesel engines


Boiler pressure vessel


6. Chemical tanker


Expansion joint


8. Spiral welded pipes for furnace pipes and dryers