SUS321 austenitic stainless steel is Ni-Cr-Mo austenitic stainless steel, its performance is very similar to 304, but due to the addition of metallic titanium, it has better resistance to grain boundary corrosion and high temperature strength. Due to the addition of metallic titanium, it effectively controls the formation of chromium carbide.
SUS321 austenitic stainless steel has good corrosion resistance in the atmosphere, and is widely used in petrochemical, power, bridge and automobile industries. But the "stainlessness" of stainless steel is not absolute. Due to the special service environment, stainless steel will also corrode. Factors such as medium concentration, pH value, and temperature will have a greater impact on the corrosion resistance of stainless steel. For example, if it is used for a long time in the sensitization temperature range of 450~850℃, intergranular corrosion will occur in stainless steel. The mechanism is that C combines with Cr at the grain boundary to form Cr23C6 and precipitate out, which reduces the Cr content at the grain boundary. This is called "chromium-depleted". The Cr element is one of the main elements that inhibit intergranular corrosion. When the Cr content at the grain boundary is less than 12%, the chance of intergranular corrosion will increase.
SUS321 austenitic stainless steel Industry application:
It is used in outdoor open-air machines that require high chemical resistance, coal, and petroleum industries to resist grain boundary corrosion, heat-resistant parts for building materials, and parts with difficulty in heat treatment
1. Petroleum waste gas combustion pipeline
2. Engine exhaust pipe
3. Boiler shell, heat exchanger, heating furnace parts
4. Silencer parts for diesel engines
5. Boiler and pressure vessel
6. Chemical truck
7. Expansion joint
8. Spiral welded pipe for furnace pipes and dryers
If you need SUS321 austenitic stainless steel, please contact us!
