R30021 Cobalt vs. C15500 Copper
R30021 cobalt belongs to the cobalt alloys classification, while C15500 copper belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is R30021 cobalt and the bottom bar is C15500 copper.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 120 |
| Elongation at Break, % | 9.0 | |
| 3.0 to 37 |
| Poisson's Ratio | 0.29 | |
| 0.34 |
| Shear Modulus, GPa | 86 | |
| 43 |
| Tensile Strength: Ultimate (UTS), MPa | 700 | |
| 280 to 550 |
| Tensile Strength: Yield (Proof), MPa | 500 | |
| 130 to 530 |
Thermal Properties
| Latent Heat of Fusion, J/g | 330 | |
| 210 |
| Melting Completion (Liquidus), °C | 1350 | |
| 1080 |
| Melting Onset (Solidus), °C | 1190 | |
| 1080 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 390 |
| Thermal Conductivity, W/m-K | 15 | |
| 350 |
| Thermal Expansion, µm/m-K | 11 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.9 | |
| 90 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 91 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 8.9 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 2.7 |
| Embodied Energy, MJ/kg | 110 | |
| 42 |
| Embodied Water, L/kg | 520 | |
| 360 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 57 | |
| 15 to 84 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 570 | |
| 72 to 1210 |
| Stiffness to Weight: Axial, points | 15 | |
| 7.2 |
| Stiffness to Weight: Bending, points | 24 | |
| 18 |
| Strength to Weight: Axial, points | 23 | |
| 8.6 to 17 |
| Strength to Weight: Bending, points | 21 | |
| 11 to 17 |
| Thermal Diffusivity, mm2/s | 3.8 | |
| 100 |
| Thermal Shock Resistance, points | 21 | |
| 9.8 to 20 |
Alloy Composition
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| Carbon (C), % | 0.2 to 0.35 | |
| 0 |
| Chromium (Cr), % | 26 to 29 | |
| 0 |
| Cobalt (Co), % | 61.7 to 67.3 | |
| 0 |
| Copper (Cu), % | 0 | |
| 99.75 to 99.853 |
| Iron (Fe), % | 0 to 3.0 | |
| 0 |
| Magnesium (Mg), % | 0 | |
| 0.080 to 0.13 |
| Molybdenum (Mo), % | 4.5 to 6.0 | |
| 0 |
| Nickel (Ni), % | 2.0 to 3.0 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0.040 to 0.080 |
| Silicon (Si), % | 0 to 1.5 | |
| 0 |
| Silver (Ag), % | 0 | |
| 0.027 to 0.1 |
| Residuals, % | 0 | |
| 0 to 0.2 |