Type 321 (UNS S32100) is an austenitic flat rolled coil stainless steel that has fives times more titanium than carbon in its content. The increased titanium level aids in preventing carbide precipitation during welding. As a result, Type 321 is both creep resistant and resistant to oxidation.
321 stainless steel flat rolled coil is generally used in applications that require sustainability to high intermittent temperatures.
321 Stainless Steel Specifications:
ASTM A240 for annealed condition
ASTM A666 for tempered material*
321 Stainless Steel Applications:
Aerospace
Aircraft exhaust manifolds and flanges, Jet engine parts
Automotive
Diesel and heavy duty exhaust systems, Heat exchangers
Chemical Processing
Chemical handling equipment, Oil refinery equipment
Construction
Firewalls
| Composition per ASTM A240 | |
| Carbon | .08 Max |
| Manganese | 2.00 Max |
| Phosphorus | .045 Max |
| Sulfur | .030 Max |
| Silicon | .75 Max |
| Chromium | 17.00 – 19.00 |
| Nickel | 9.00 – 12.00 |
| Nitrogen | .10 Max |
| Molybdenum | |
| Mechanical Properties (Annealed, Per ASTM A240) | |
| UTS | 75,000 ksi Min |
| Elongation % in 2″ | 40.00 Min |
| Rockwell Hardness | RB95.00 Max |
Magnetic properties:
321 rolled coil stainless steel is generally non-magnetic.
Forming:
Type 321 can be easily formed and drawn, but it may require re-annealing after forming and drawing.
