Corrosion Resistant 321 Stainless Steel Plate
Available in 1500mm, 1800mm, and 2000mm widths for industrial applications requiring high temperature resistance and corrosion protection.
Product Specifications
| Product Type | 321 Stainless Steel Sheet, 321 Stainless Steel Plate |
| Specification | ASTM A240 / ASME SA240 |
| Dimensions | Cold rolled: 4ft×8ft (1219×2438mm) Hot rolled: 5ft×20ft, 6ft×20ft (1500×6000mm, 1800×6000mm, 2000×6000mm) |
| Thickness | 0.6 to 80 mm |
| Width | 1219mm, 1500mm, 1800mm, 2000mm |
| Length | 2m, 2.44m, 3m, 6m or custom requirements |
| Finish | 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, etc. |
| Our Services | Laser cutting, bending, welding, polishing |
| Forms / Shapes | 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 |
Grade 321 / 321H Stainless Steel Overview
321 stainless steel is a titanium-stabilized grade designed for service in the 1000-1600°F temperature range. For optimal resistance to intergranular corrosion and polythionic acid stress corrosion cracking, a stabilizing treatment at 1550-1650°F with air cooling is recommended.
This grade is readily weldable by all common methods including submerged arc, with appropriate weld fillers being AWS ER347 bare wire and E347 covered electrodes. It has a machinability rating of 45% relative to AISI B1112.
Available Forms
Sheet, plate, coil, strip, wire, pipe, tube, bar, profile, round, flat, square, hexagonal
Specifications and Certifications
- Grade 321/321H
- ASTM A240, ASME SA240, BS EN 10028-7, BS EN 10088-2 and BS EN 10088-4
- EN 10088/2, EN 10088/4 and CE Marking
- NACE MR 0175/ISO 15156 Certification
Typical Applications
- Aircraft piston engine manifolds
- Expansion joints
- Firearms production
- Thermal oxidizers
- Refinery equipment
- High temperature chemical process equipment
Chemical Composition (wt%)
| 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 |
Mechanical Properties
| Property | 321 |
| Yield Strength, min. (ksi) | 30 |
| Tensile Strength, min. (ksi) | 75 |
| Elongation, min. (%) | 40 |
| Hardness, max. (Rb) | 95 |
Grade Specification Comparison
| 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 |
Alternative Grades
| Grade | Selection Criteria |
| 304L | When resistance to intergranular corrosion is required without need for high-temperature strength |
| 3CR12 | For mild high-temperature environments up to approximately 600°C |
| 304H | For mild high-temperature environments up to approximately 800°C |
| 310 | For operating environments up to approximately 1100°C |
| S30815 (253MA) | For operating environments up to approximately 1150°C |
Other Available Grades
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, etc.
Product Images