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DIN Ck30 vs DIN Ck40
Property comparison of DIN Ck30 and DIN Ck40, both carbon steel.
| Property | DIN Ck30 | DIN Ck40 | Difference |
|---|---|---|---|
| Yield strength | 350 MPa | 400 MPa | +14% |
| Tensile strength | 550 MPa | 630 MPa | +15% |
| Elongation | 20 % | 18 % | -10% |
| 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 | 61.6 W/m·K | 57.8 W/m·K | -6% |
| Specific heat | 460 J/kg·K | 462 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 DIN Ck40 relative to DIN Ck30. Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
DIN Ck30
- standard
- DIN
- heat treatment
- —
DIN Ck40
- standard
- DIN
- heat treatment
- heat treated
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