SAE 431 Stainless Steel (Oil quenched from 980°C (1800 °F); tempered at 40 °C (104 °F) vs SAE 446 Stainless Steel (Annealed at 815 °C (1500 °F) and cold drawn)
Property comparison of SAE 431 Stainless Steel (Oil quenched from 980°C (1800 °F); tempered at 40 °C (104 °F) and SAE 446 Stainless Steel (Annealed at 815 °C (1500 °F) and cold drawn), both stainless steel.
| Property | SAE 431 Stainless Steel (Oil quenched from 980°C (1800 °F); tempered at 40 °C (104 °F) | SAE 446 Stainless Steel (Annealed at 815 °C (1500 °F) and cold drawn) | Difference |
|---|---|---|---|
| Yield strength | 1,140 MPa | 462 MPa | -59% |
| Tensile strength | 1,435 MPa | 607 MPa | -58% |
| Elongation | 17 % | 26 % | +53% |
| Elastic modulus | 193,000 MPa | 193,000 MPa | 0% |
| Shear modulus | 74,231 MPa | 74,231 MPa | 0% |
| Poisson ratio | 0.3 | 0.3 | 0% |
| Density | 7,850 kg/m³ | 7,850 kg/m³ | 0% |
| Brinell hardness | 419 HB | 216 HB | -48% |
| Thermal conductivity | 24.7 W/m·K | 25 W/m·K | +1% |
| Specific heat | 460 J/kg·K | 460 J/kg·K | 0% |
| Coefficient of thermal expansion | 0.00001 1/K | 0.000011 1/K | +3% |
| Melting point | 1,450 °C | 1,480 °C | +2% |
| Reduction in area | 59 % | 64 % | +8% |
Difference is SAE 446 Stainless Steel (Annealed at 815 °C (1500 °F) and cold drawn) relative to SAE 431 Stainless Steel (Oil quenched from 980°C (1800 °F); tempered at 40 °C (104 °F). Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
- grade
- 431
- standard
- SAE
- heat treatment
- Oil quenched from 980°C (1800 °F); tempered at 40 °C (104 °F)
- grade
- 446
- standard
- SAE
- heat treatment
- Annealed at 815 °C (1500 °F) and cold drawn
About 400-series stainless steels
Martensitic and ferritic stainless steels carry less nickel than the 300-series and remain magnetic. 410 and 420 are hardenable by quench and temper and are used for cutlery, shafts, and valve parts. 430 stays soft and is used for cosmetic trim and mild corrosion service. Compared to 300-series grades they trade general corrosion resistance for hardenability.
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