C18600 Copper vs. R31539 Cobalt
C18600 copper belongs to the copper alloys classification, while R31539 cobalt belongs to the cobalt alloys. There are 26 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is C18600 copper and the bottom bar is R31539 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 120 | |
| 220 |
| Elongation at Break, % | 8.0 to 11 | |
| 13 to 22 |
| Poisson's Ratio | 0.34 | |
| 0.29 |
| Shear Modulus, GPa | 44 | |
| 86 |
| Tensile Strength: Ultimate (UTS), MPa | 520 to 580 | |
| 1000 to 1340 |
| Tensile Strength: Yield (Proof), MPa | 500 to 520 | |
| 590 to 940 |
Thermal Properties
| Latent Heat of Fusion, J/g | 210 | |
| 320 |
| Melting Completion (Liquidus), °C | 1090 | |
| 1360 |
| Melting Onset (Solidus), °C | 1070 | |
| 1290 |
| Specific Heat Capacity, J/kg-K | 390 | |
| 450 |
| Thermal Conductivity, W/m-K | 280 | |
| 13 |
| Thermal Expansion, µm/m-K | 17 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 70 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 71 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.9 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 2.9 | |
| 8.2 |
| Embodied Energy, MJ/kg | 46 | |
| 110 |
| Embodied Water, L/kg | 310 | |
| 530 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 44 to 58 | |
| 140 to 190 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1060 to 1180 | |
| 780 to 2000 |
| Stiffness to Weight: Axial, points | 7.3 | |
| 15 |
| Stiffness to Weight: Bending, points | 18 | |
| 24 |
| Strength to Weight: Axial, points | 16 to 18 | |
| 33 to 44 |
| Strength to Weight: Bending, points | 16 to 17 | |
| 27 to 32 |
| Thermal Diffusivity, mm2/s | 81 | |
| 3.5 |
| Thermal Shock Resistance, points | 19 to 20 | |
| 24 to 32 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 0.3 to 1.0 |
| Carbon (C), % | 0 | |
| 0 to 0.14 |
| Chromium (Cr), % | 0.1 to 1.0 | |
| 26 to 30 |
| Cobalt (Co), % | 0 to 0.1 | |
| 57.7 to 68.7 |
| Copper (Cu), % | 96.5 to 99.55 | |
| 0 |
| Iron (Fe), % | 0.25 to 0.8 | |
| 0 to 0.75 |
| Lanthanum (La), % | 0 | |
| 0.030 to 0.2 |
| Manganese (Mn), % | 0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 5.0 to 7.0 |
| Nickel (Ni), % | 0 to 0.25 | |
| 0 to 1.0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.25 |
| Silicon (Si), % | 0 | |
| 0 to 1.0 |
| Titanium (Ti), % | 0.050 to 0.5 | |
| 0 |
| Zirconium (Zr), % | 0.050 to 0.4 | |
| 0 |
| Residuals, % | 0 to 0.5 | |
| 0 |