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JIS SS490 vs JIS STKM12A
Property comparison of JIS SS490 and JIS STKM12A, both carbon steel.
| Property | JIS SS490 | JIS STKM12A | Difference |
|---|---|---|---|
| Yield strength | 275 MPa | 175 MPa | -36% |
| Tensile strength | 490 MPa | 340 MPa | -31% |
| Elongation | 19 % | 35 % | +84% |
| 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 | 45.2 W/m·K | 65.4 W/m·K | +45% |
| Specific heat | 471 J/kg·K | 457 J/kg·K | -3% |
| Coefficient of thermal expansion | 0.000012 1/K | 0.000012 1/K | 0% |
| Melting point | 1,480 °C | 1,480 °C | 0% |
Difference is JIS STKM12A relative to JIS SS490. Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
JIS SS490
- standard
- JIS
JIS STKM12A
- standard
- JIS
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