Austenitic 321(S32100) stainless steel plate/coil

Austenitic 321(S32100) stainless steel plate/coil

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Description

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

Chemical Composition:

Element Percentage
Carbon (max) 0.08
Manganese (max) 2.00
Silicon (max) 0.75
Chromium 17.00-19.00
Nickel 9.00-12.00
Titanium 0.70

Mechanical Properties:

Property Value
Tensile Strength (min) 75 ksi (515 MPa)
Yield Strength (min) 30 ksi (205 MPa)
Elongation (min) 40%
Hardness (max) 95 HRB

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:

Dimension Range
Thickness 0.3 – 80 mm
Width 1000 – 2200 mm
Length 2438 – 12000 mm

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.

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