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BS 304S15 vs BS 321S31
Property comparison of BS 304S15 and BS 321S31, both carbon steel.
| Property | BS 304S15 | BS 321S31 | Difference |
|---|---|---|---|
| Yield strength | 195 MPa | 195 MPa | 0% |
| Tensile strength | 480 MPa | 490 MPa | +2% |
| Elongation | 40 % | 40 % | 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 | 460 J/kg·K | 460 J/kg·K | 0% |
| 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 321S31 relative to BS 304S15. 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 304S15
- standard
- BS
BS 321S31
- standard
- BS
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