321 Stainless Steel
UNS S32100
Description
The 321 grade is a stable austenitic stainless steel. It has good heat resistance, good corrosion resistance and good processing performance.
- Good heat resistance: 321 stainless steel has good oxidation resistance in high temperature environment and it can work stably below 800 ℃ for a long time.
- Good corrosion resistance: 321 stainless steel still has good corrosion resistance even under acidic environment and its corrosion resistance is better than 304 stainless steel.
- Good processing performance: 321 stainless steel has good malleability, stretchability and weldability, so it can be easily machined into a variety of shapes.
Chemical Component
| C | Mn | Si | P | S | Ni | Cr | Ti | N | Fe |
|---|---|---|---|---|---|---|---|---|---|
| 0.08% max | 2.0% max | 0.75% max | 0.045% max | 0.030% max | 9.00-12.00% | 17.0 -19.0% | 5*(C+N)-0.70% | 0.10% max | Balance max |
Basic Information
| Items | 321 Stainless Steel |
|---|---|
| Catalog | ACMA-Fe-A015 |
| Density | 8.09 g/cm3 |
| Modulus of Elasticity (E) | At 70 °F (20 °C): 28.0 x 103 ksi (193 GPa) |
| Modulus of Rigidity (G) | At 70 °F (20 °C): 11.2 x 103 ksi (78 GPa) |
| Coefficient of Expansion | 11.2 µin/in-°F (32-1500 °F); 20.2 µm/m-°C (0-871 °C) |
| Electrical Resistivity | 28.4 µohm-in, (72.0 µohm-cm) |
| Thermal Conductivity | 11 Btu-in/ft2-hr-°F (212 °F), 16.0 W/m-°C (100 °C) |
Material Forms
Alfa Chemistry offers 321 stainless steel in a variety of forms, including Wire, Bar, Strip, Foil.
Typical Mechanical Properties
- 321 stainless steel alloy wire & bar
| Properties | Annealed | Spring |
|---|---|---|
| Heat Treatment | 1750-2050 °F (954-1121 °C) | Stress relieve 600-900 °F (316-482 °C) |
| Tensile Strength | 80-110 ksi (552-758 MPa) | 200 ksi min (1379 MPa) |
| Suggested Operating Conditions | Up to 1500 °F (816 °C) | Up to 550 °F (228 °C) |
- 321 stainless steel alloy strip & foil
| Properties | Annealed |
|---|---|
| Heat Treatment | 1750-2050 °F (954-1121 °C) |
| Tensile Strength | 70-100 ksi |
| Suggested Operating Conditions | Up to 1500 °F (816 °C) |
Specifications
Wire & Bar: AMS 5689, 5645, ASTM A313, ASTM A580, NACE MR0175/ISO 15156
Strip & Foil: AMS 5510, ASTM A240
Applications
- Industries: Aerospace, oil & gas, chemical processing, food processing, waste treatment
- Specifically: Annealing covers, high-temperature tempering equipment, diesel and heavy-duty automotive exhaust, firewalls, stack liners, boiler casings, welded pressure vessels, aircraft components, bellows, oil refinery equipment, fasteners, springs
* Technical data included herein should be used as a guideline only, and should not be construed as maximum or minimum values for specification or for final design, or for a particular use or application. The data may be revised anytime without notice.
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