R31538 Cobalt vs. Grade TDSiCrV Steel
R31538 cobalt belongs to the cobalt alloys classification, while grade TDSiCrV steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is R31538 cobalt and the bottom bar is grade TDSiCrV steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 190 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Reduction in Area, % | 13 to 22 | |
| 48 |
| Shear Modulus, GPa | 86 | |
| 80 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 to 1360 | |
| 2100 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 270 |
| Melting Completion (Liquidus), °C | 1360 | |
| 1440 |
| Melting Onset (Solidus), °C | 1290 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 480 |
| Thermal Conductivity, W/m-K | 13 | |
| 47 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 8.6 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 7.7 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 1.9 |
| Embodied Energy, MJ/kg | 110 | |
| 26 |
| Embodied Water, L/kg | 530 | |
| 50 |
Common Calculations
| Stiffness to Weight: Axial, points | 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 25 |
| Strength to Weight: Axial, points | 34 to 45 | |
| 75 |
| Strength to Weight: Bending, points | 27 to 32 | |
| 47 |
| Thermal Diffusivity, mm2/s | 3.5 | |
| 13 |
| Thermal Shock Resistance, points | 25 to 33 | |
| 63 |
Alloy Composition
| Carbon (C), % | 0.15 to 0.35 | |
| 0.5 to 0.7 |
| Chromium (Cr), % | 26 to 30 | |
| 0.5 to 1.0 |
| Cobalt (Co), % | 58.7 to 68.9 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 0.1 |
| Iron (Fe), % | 0 to 0.75 | |
| 96.1 to 97.8 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0.4 to 0.9 |
| Molybdenum (Mo), % | 5.0 to 7.0 | |
| 0 |
| Nickel (Ni), % | 0 to 1.0 | |
| 0 |
| Nitrogen (N), % | 0 to 0.25 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 1.0 | |
| 1.2 to 1.7 |
| Sulfur (S), % | 0 | |
| 0 to 0.020 |
| Vanadium (V), % | 0 | |
| 0.1 to 0.25 |