Chemical Composition and Mechanical Properties of Austenitic 321 (S32100) Stainless Steel

Chemical Composition:

Mechanical Properties:

Applications and Industries Using 321 Stainless Steel Plates and Coils

321 stainless steel is widely used in:

1. Aerospace Industry: Aircraft exhaust systems and engine parts
2. Chemical Processing Equipment: Heat exchangers, pressure vessels, and storage tanks
3. Thermal Equipment: Boilers, furnace parts, and industrial heat-treating equipment
4. Petroleum and Refining Industry: Piping and refining equipment
5. Automotive Industry: Exhaust systems and components exposed to high temperatures
6. Marine and Shipbuilding
7. Food Industry
8. Nuclear Engineering

Manufacturing Process and Available Dimensions

Manufacturing Process: Hot rolled or cold rolled

Available Dimensions:

Surface Finish Options: No.1, 2B, BA, MATT, PVC coated, No.4, No.5, SB, HR, No.8, Mirror, Hairline, Brush, Textured

Corrosion Resistance and High-Temperature Performance

321 stainless steel offers excellent resistance to intergranular corrosion due to its titanium stabilization. It can withstand temperatures up to 900°C (1652°F), making it suitable for high-temperature applications where 304 is typically used up to 500°C (932°F).

Welding and Fabrication Considerations

321 stainless steel has excellent welding characteristics. It can be welded using all fusion and resistance welding processes. No preheating is required, and post-weld annealing is generally unnecessary.

Comparison of 321 with Other Austenitic Stainless Steel Grades

321 is similar to 304 but with added titanium for improved corrosion resistance and high-temperature performance. It offers better resistance to sensitization during welding and prolonged exposure to high temperatures compared to 304.