ASTM A240/240M Cold Rolled Bright Surface 321 Stainless Steel Plate and Sheet
321 stainless steel is a titanium-stabilized austenitic grade designed for high-temperature service in the 1000-1600°F range. This grade offers excellent resistance to intergranular corrosion and polythionic acid stress corrosion cracking.
SATIN, 2B, 2D, BA NO (8), Cold rolled sheet (CR), Hot rolled plate (HR), No.1 finish hot rolled, 1D, No.4, BA, 8K, hairline, brush, mirror, and more.
Plate, Sheet, Coils, Foils, Strip, Flats, Clad Plate, Plain Sheet, Rolling Sheet, Rolling Plate, Flat Shim, Flat Sheet, Shim Sheet, Rolls, Blank (Circle), sheared, annealed, soft annealed, descaled, tread plate, Checker Plate
Laser Cutting, bending, welding, polishing
SS 321, SUS 321, Inox 321, DIN 1.4541, UNS S32100, AISI 321, SAE 321 Sheet
| Element | 321 |
|---|---|
| Carbon | 0.08 |
| Chromium | 17.0-19.0 |
| Nickel | 9.0-12.0 |
| Manganese | 2.00 |
| Silicon | 0.75 |
| Nitrogen | 0.10 |
| Phosphorus | 0.045 |
| Sulfur | 0.030 |
| Titanium | 5(C+N) min / 0.70 max |
| Property | 321 |
|---|---|
| Yield Strength, min. (ksi) | 30 |
| Tensile Strength, min. (ksi) | 75 |
| Elongation, min. (%) | 40 |
| Hardness, max. (Rb) | 95 |
| Grade | UNS No | Old British | Euronorm | Swedish SS | Japanese JIS |
|---|---|---|---|---|---|
| 321 | S32100 | 321S31 | 1.4541 | 2337 | SUS 321 |
| 321H | S32109 | 321S51 | 1.4878 | - | SUS 321H |
| 347 | S34700 | 347S31 | 1.4550 | 2338 | SUS 347 |
- Aircraft piston engine manifolds
- Expansion joints
- Firearms production
- Thermal oxidizers
- Refinery equipment
- High temperature chemical process equipment
| Grade | Why it might be chosen instead of 321 |
|---|---|
| 304L | The requirement is for resistance to intergranular corrosion, not for high-temperature strength |
| 3CR12 | Only a mild "high temperature" environment is present… up to about 600 °C |
| 304H | Only a mild "high temperature" environment is present… up to about 800 °C |
| 310 | The temperature of the operating environment is up to about 1100 °C - too high for 321 or 321H |
| S30815 (253MA) | The temperature of the operating environment is up to about 1150 °C - too high for 321 or 321H |
201, 202, 304, 304L, 304H, 309S, 310S, 310H, 310Si2, 316L, 316Ti, 316LN, 317L, 321, 347, 409L, 410, 410S, 416, 420, 430, 431, 436L, 439, 441, 443, 444, S31803, S32750, 904L, S30815, S31254, C276, C4, 600, 625, and more.
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