Stainless Steel 321
Material Data Sheet
is an austenitic chrome-nickel stainless, titanium added, for parts intermittently heated to temperatures between 800/1650°F (427/899°C). It is designed to eliminate intergranular corrosion in the as-welded condition.
Chemical Composition
| Element | Content (%) |
|---|---|
| Iron, Fe | 68.0 |
| Chromium, Cr | 18.0 |
| Nickel, Ni | 11.0 |
| Manganese, Mn | 2.0 |
| Silicon, Si | 1.0 |
| Carbon, C | 0.08 |
| Phosphorous, P | 0.045 |
| Sulfur, S | 0.03 |
| Titanium, Ti | 0.15 |
Physical Properties
| Properties | Metric | English |
|---|---|---|
| Density | 8 g/cc | 0.289 lb/in³ |
| Melting Point | 1400 – 1425 °C | 2550 – 2600 °F |
Mechanical Properties
| Properties | Metric | English |
|---|---|---|
| Hardness, Rockwell B | 80 | 80 |
| Tensile Strength, Ultimate | 620 MPa | 89900 psi |
| Tensile Strength, Yield | 240 MPa | 34800 psi |
| Elongation at Break | 45% | 45% |
| Modulus of Elasticity | 193 – 200 GPa | 28000 – 29000 ksi |
| Charpy Impact | 165 J | 122 ft-lb |
| Izod Impact | 135 J | 99.6 ft-ln |
Applications
Stainless Steel 321 is used in the following application areas:
- Aircraft exhaust manifolds
- Expansion joints
- Bellows
- Furnace parts
- Heating element tubing
- Heat Exchangers
- Woven or welded screens for high-temperature mineral processing
- Spiral Welded tube for burner pipes and flues
