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JIS SMnC420 vs JIS SNCM630
Property comparison of JIS SMnC420 and JIS SNCM630, both carbon steel.
| Property | JIS SMnC420 | JIS SNCM630 | Difference |
|---|---|---|---|
| Yield strength | 680 MPa | 1,000 MPa | +47% |
| Tensile strength | 980 MPa | 1,200 MPa | +22% |
| Elongation | 8 % | 9 % | +13% |
| 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 | 65.4 W/m·K | 51.9 W/m·K | -21% |
| Specific heat | 457 J/kg·K | 460 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 JIS SNCM630 relative to JIS SMnC420. 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 SMnC420
- standard
- JIS
JIS SNCM630
- standard
- JIS
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