Stainless Steel 330
Material Data Sheet
330 steel is an austenitic heat and corrosion resisting alloy that offers a combination of strength and resistance to carburization, oxidation, and thermal shock. 330 stainless steel was designed for applications in high-temperature industrial environments where good resistance to the combined effects of carburization and thermal cycling is required, such as the heat treat industry. Carburization and oxidation resistance to about 2100°F are enhanced by the silicon content of the alloy. 330 stainless remains fully austenitic at all temperatures and is not subject to embrittlement from sigma formation. It has a solid solution composition and is not hardenable by heat treatment. The alloy’s strength and oxidation resistance at high temperatures make it a useful material for industrial heating furnaces.1.
| Element | Content (%) |
|---|---|
| Iron, Fe | 42.0 |
| Nickel, Ni | 36.0 |
| Chromium, Cr | 19.0 |
| Manganese, Mn | 2.0 |
| Silicon, Si | 1.13 |
| Carbon, C | 0.08 |
| Phosphorous, P | 0.04 |
| Sulfur, S | 0.03 |
| Porperty | Metric | Imperial |
|---|---|---|
| Density | 8 g/cm³ | 0.289 lb/in³ |
| Melting Point | 1400 – 1425 °C | 2550 – 2597 °F |
| Property | Metric | Imperial |
|---|---|---|
| Hardness, Brinell | 139 | 139 |
| Hardness, Knoop | 155 | 155 |
| Hardness, Rockwell B | 80 | 80 |
| Hardness, Vickers | 153 | 153 |
| Tensile Strength, Ultimate | 585 MPa | 84800 psi |
| Tensile Strength, Yield | 290 MPa | 42100 psi |
| Elongation at Break | 45% | 45% |
| Modulus of Elasticity | 550 MPa | 79800 psi |
| Poisson’s Ratio | 0.27 – 0.30 | 0.27 – 0.30 |
Stainless Steel 330 is used in the following application areas:
- Furnace containers-carburizing, carbonitriding, annealing malleablizing
- Muffles, retorts
- Bar frame heat-treating baskets
- Quenching fixtures
- Radiant tubes
- Salt pots
- Furnace fans and shafts
- Conveyors
- Tube hangers for crude oil heaters adn steam boilers
- Heat exchangers
- Flares
