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BS 708M40 vs BS 722M24
Property comparison of BS 708M40 and BS 722M24, both carbon steel.
| Property | BS 708M40 | BS 722M24 | Difference |
|---|---|---|---|
| Yield strength | 665 MPa | 685 MPa | +3% |
| Tensile strength | 850 MPa | 850 MPa | 0% |
| Elongation | 13 % | 13 % | 0% |
| Elastic modulus | 206,000 MPa | 206,000 MPa | 0% |
| Shear modulus | 80,000 MPa | 80,000 MPa | 0% |
| Poisson ratio | 0.3 | 0.3 | 0% |
| Density | 7,860 kg/m³ | 7,860 kg/m³ | 0% |
| Thermal conductivity | 51.9 W/m·K | 51.9 W/m·K | 0% |
| Specific heat | 462 J/kg·K | 458 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 BS 722M24 relative to BS 708M40. Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
BS 708M40
- standard
- BS
- heat treatment
- heat treated
BS 722M24
- standard
- BS
- heat treatment
- nitrided
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