R30008 Cobalt vs. C17500 Copper
R30008 cobalt belongs to the cobalt alloys classification, while C17500 copper belongs to the copper alloys. There are 23 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 C17500 copper.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 120 |
| Elongation at Break, % | 1.1 to 73 | |
| 6.0 to 30 |
| Fatigue Strength, MPa | 320 to 530 | |
| 170 to 310 |
| Poisson's Ratio | 0.29 | |
| 0.34 |
| Shear Modulus, GPa | 83 | |
| 45 |
| Tensile Strength: Ultimate (UTS), MPa | 950 to 1700 | |
| 310 to 860 |
| Tensile Strength: Yield (Proof), MPa | 500 to 1080 | |
| 170 to 760 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 220 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1060 |
| Melting Onset (Solidus), °C | 1330 | |
| 1020 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 390 |
| Thermal Expansion, µm/m-K | 13 | |
| 18 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 95 | |
| 60 |
| Density, g/cm3 | 8.4 | |
| 8.9 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 4.7 |
| Embodied Energy, MJ/kg | 110 | |
| 73 |
| Embodied Water, L/kg | 400 | |
| 320 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 590 to 2720 | |
| 120 to 2390 |
| Stiffness to Weight: Axial, points | 14 | |
| 7.5 |
| Stiffness to Weight: Bending, points | 24 | |
| 18 |
| Strength to Weight: Axial, points | 31 to 56 | |
| 9.7 to 27 |
| Strength to Weight: Bending, points | 25 to 37 | |
| 11 to 23 |
| Thermal Shock Resistance, points | 25 to 44 | |
| 11 to 29 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 0 to 0.2 |
| Beryllium (Be), % | 0 | |
| 0.4 to 0.7 |
| Boron (B), % | 0 to 0.0010 | |
| 0 |
| Carbon (C), % | 0 to 0.15 | |
| 0 |
| Chromium (Cr), % | 18.5 to 21.5 | |
| 0 |
| Cobalt (Co), % | 39 to 42 | |
| 2.4 to 2.7 |
| Copper (Cu), % | 0 | |
| 95.6 to 97.2 |
| Iron (Fe), % | 7.6 to 20 | |
| 0 to 0.1 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 |
| Molybdenum (Mo), % | 6.5 to 7.5 | |
| 0 |
| Nickel (Ni), % | 15 to 18 | |
| 0 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 |
| Silicon (Si), % | 0 to 1.2 | |
| 0 to 0.2 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.5 |