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Steel SAE 8740 vs Steel SAE 9255
Property comparison of Steel SAE 8740 and Steel SAE 9255, both carbon steel.
| Property | Steel SAE 8740 | Steel SAE 9255 | Difference |
|---|---|---|---|
| Yield strength | 607 MPa | 2,048 MPa | +237% |
| Tensile strength | 929 MPa | 2,103 MPa | +126% |
| Elongation | 16 % | 1 % | -94% |
| Elastic modulus | 207,000 MPa | 207,000 MPa | 0% |
| Shear modulus | 79,000 MPa | 79,000 MPa | 0% |
| Poisson ratio | 0.3 | 0.3 | 0% |
| Density | 7,860 kg/m³ | 7,860 kg/m³ | 0% |
| Brinell hardness | 269 HB | 601 HB | +123% |
| Thermal conductivity | 51.9 W/m·K | 51.9 W/m·K | 0% |
| Specific heat | 462 J/kg·K | 466 J/kg·K | +1% |
| Coefficient of thermal expansion | 0.000012 1/K | 0.000012 1/K | 0% |
| Melting point | 1,480 °C | 1,480 °C | 0% |
Difference is Steel SAE 9255 relative to Steel SAE 8740. Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
Steel SAE 8740
- standard
- ANSI
- heat treatment
- normalized
Steel SAE 9255
- standard
- ANSI
- heat treatment
- tempered at 400 F
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