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NF 18NCD6 vs NF 25CD4
Property comparison of NF 18NCD6 and NF 25CD4, both carbon steel.
| Property | NF 18NCD6 | NF 25CD4 | Difference |
|---|---|---|---|
| Yield strength | 850 MPa | 600 MPa | -29% |
| Tensile strength | 1,200 MPa | 780 MPa | -35% |
| Elongation | 8 % | 14 % | +75% |
| 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 | 457 J/kg·K | 458 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 NF 25CD4 relative to NF 18NCD6. Values are taken from the representative row of each material; both materials may have multiple heat treatments or conditions on their individual pages.
Identification
NF 18NCD6
- standard
- NF
- heat treatment
- case-hardened
NF 25CD4
- standard
- NF
- heat treatment
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