R31538 Cobalt vs. C17000 Copper
R31538 cobalt belongs to the cobalt alloys classification, while C17000 copper belongs to the copper alloys. There are 27 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is R31538 cobalt and the bottom bar is C17000 copper.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 120 |
| Elongation at Break, % | 13 to 23 | |
| 1.1 to 31 |
| Poisson's Ratio | 0.29 | |
| 0.33 |
| Rockwell C Hardness | 25 to 35 | |
| 21 to 42 |
| Shear Modulus, GPa | 86 | |
| 45 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 to 1360 | |
| 490 to 1310 |
| Tensile Strength: Yield (Proof), MPa | 580 to 930 | |
| 160 to 1140 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 230 |
| Melting Completion (Liquidus), °C | 1360 | |
| 980 |
| Melting Onset (Solidus), °C | 1290 | |
| 870 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 390 |
| Thermal Conductivity, W/m-K | 13 | |
| 110 |
| Thermal Expansion, µm/m-K | 13 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 22 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 22 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 8.8 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 8.7 |
| Embodied Energy, MJ/kg | 110 | |
| 140 |
| Embodied Water, L/kg | 530 | |
| 310 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 200 | |
| 4.2 to 390 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 750 to 1920 | |
| 110 to 5420 |
| Stiffness to Weight: Axial, points | 15 | |
| 7.6 |
| Stiffness to Weight: Bending, points | 24 | |
| 19 |
| Strength to Weight: Axial, points | 34 to 45 | |
| 15 to 41 |
| Strength to Weight: Bending, points | 27 to 32 | |
| 16 to 30 |
| Thermal Diffusivity, mm2/s | 3.5 | |
| 32 |
| Thermal Shock Resistance, points | 25 to 33 | |
| 17 to 45 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 0 to 0.2 |
| Beryllium (Be), % | 0 | |
| 1.6 to 1.8 |
| Carbon (C), % | 0.15 to 0.35 | |
| 0 |
| Chromium (Cr), % | 26 to 30 | |
| 0 |
| Cobalt (Co), % | 58.7 to 68.9 | |
| 0 |
| Copper (Cu), % | 0 | |
| 96.3 to 98.2 |
| Iron (Fe), % | 0 to 0.75 | |
| 0 to 0.4 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 |
| Molybdenum (Mo), % | 5.0 to 7.0 | |
| 0 |
| Nickel (Ni), % | 0 to 1.0 | |
| 0.2 to 0.6 |
| Nitrogen (N), % | 0 to 0.25 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.2 |
| Residuals, % | 0 | |
| 0 to 0.5 |