SAE 431 Stainless Steel (Annealed bar) vs SAE 446 Stainless Steel (Annealed bar)
Property comparison of SAE 431 Stainless Steel (Annealed bar) and SAE 446 Stainless Steel (Annealed bar), both stainless steel.
| Property | SAE 431 Stainless Steel (Annealed bar) | SAE 446 Stainless Steel (Annealed bar) | Difference |
|---|---|---|---|
| Yield strength | 655 MPa | 345 MPa | -47% |
| Tensile strength | 860 MPa | 550 MPa | -36% |
| Elongation | 20 % | 25 % | +25% |
| 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 | 260 HB | 167 HB | -36% |
| 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 | 55 % | 45 % | -18% |
Difference is SAE 446 Stainless Steel (Annealed bar) relative to SAE 431 Stainless Steel (Annealed bar). 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
- Annealed bar
- grade
- 446
- standard
- SAE
- heat treatment
- Annealed bar
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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