R30008 Cobalt vs. C82500 Copper
R30008 cobalt belongs to the cobalt alloys classification, while C82500 copper belongs to the copper alloys. There are 21 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is R30008 cobalt and the bottom bar is C82500 copper.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 120 |
| Elongation at Break, % | 1.1 to 73 | |
| 1.0 to 20 |
| Poisson's Ratio | 0.29 | |
| 0.33 |
| Shear Modulus, GPa | 83 | |
| 45 |
| Tensile Strength: Ultimate (UTS), MPa | 950 to 1700 | |
| 550 to 1100 |
| Tensile Strength: Yield (Proof), MPa | 500 to 1080 | |
| 310 to 980 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 240 |
| Melting Completion (Liquidus), °C | 1400 | |
| 980 |
| Melting Onset (Solidus), °C | 1330 | |
| 860 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 390 |
| Thermal Expansion, µm/m-K | 13 | |
| 17 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 8.8 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 10 |
| Embodied Energy, MJ/kg | 110 | |
| 160 |
| Embodied Water, L/kg | 400 | |
| 310 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 590 to 2720 | |
| 400 to 4000 |
| Stiffness to Weight: Axial, points | 14 | |
| 7.7 |
| Stiffness to Weight: Bending, points | 24 | |
| 19 |
| Strength to Weight: Axial, points | 31 to 56 | |
| 18 to 35 |
| Strength to Weight: Bending, points | 25 to 37 | |
| 17 to 27 |
| Thermal Shock Resistance, points | 25 to 44 | |
| 19 to 38 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 0 to 0.15 |
| Beryllium (Be), % | 0 | |
| 1.9 to 2.3 |
| Boron (B), % | 0 to 0.0010 | |
| 0 |
| Carbon (C), % | 0 to 0.15 | |
| 0 |
| Chromium (Cr), % | 18.5 to 21.5 | |
| 0 to 0.1 |
| Cobalt (Co), % | 39 to 42 | |
| 0.15 to 0.7 |
| Copper (Cu), % | 0 | |
| 95.3 to 97.8 |
| Iron (Fe), % | 7.6 to 20 | |
| 0 to 0.25 |
| Lead (Pb), % | 0 | |
| 0 to 0.020 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 |
| Molybdenum (Mo), % | 6.5 to 7.5 | |
| 0 |
| Nickel (Ni), % | 15 to 18 | |
| 0 to 0.2 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 |
| Silicon (Si), % | 0 to 1.2 | |
| 0.2 to 0.35 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Tin (Sn), % | 0 | |
| 0 to 0.1 |
| Titanium (Ti), % | 0 | |
| 0 to 0.12 |
| Zinc (Zn), % | 0 | |
| 0 to 0.1 |
| Residuals, % | 0 | |
| 0 to 0.5 |