R30075 Cobalt vs. C82400 Copper
R30075 cobalt belongs to the cobalt alloys classification, while C82400 copper belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is R30075 cobalt and the bottom bar is C82400 copper.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 to 250 | |
| 120 |
| Elongation at Break, % | 12 | |
| 1.0 to 20 |
| Poisson's Ratio | 0.29 | |
| 0.33 |
| Shear Modulus, GPa | 82 to 98 | |
| 45 |
| Tensile Strength: Ultimate (UTS), MPa | 780 to 1280 | |
| 500 to 1030 |
| Tensile Strength: Yield (Proof), MPa | 480 to 840 | |
| 260 to 970 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 230 |
| Melting Completion (Liquidus), °C | 1360 | |
| 1000 |
| Melting Onset (Solidus), °C | 1290 | |
| 900 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 380 |
| Thermal Conductivity, W/m-K | 13 | |
| 130 |
| Thermal Expansion, µm/m-K | 12 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 25 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 26 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 8.8 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 8.9 |
| Embodied Energy, MJ/kg | 110 | |
| 140 |
| Embodied Water, L/kg | 530 | |
| 310 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 84 to 140 | |
| 10 to 83 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 560 to 1410 | |
| 270 to 3870 |
| Stiffness to Weight: Axial, points | 14 to 17 | |
| 7.6 |
| Stiffness to Weight: Bending, points | 24 to 25 | |
| 19 |
| Strength to Weight: Axial, points | 26 to 42 | |
| 16 to 33 |
| Strength to Weight: Bending, points | 22 to 31 | |
| 16 to 26 |
| Thermal Diffusivity, mm2/s | 3.5 | |
| 39 |
| Thermal Shock Resistance, points | 21 to 29 | |
| 17 to 36 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.1 | |
| 0 to 0.15 |
| Beryllium (Be), % | 0 | |
| 1.6 to 1.9 |
| Boron (B), % | 0 to 0.010 | |
| 0 |
| Carbon (C), % | 0 to 0.35 | |
| 0 |
| Chromium (Cr), % | 27 to 30 | |
| 0 to 0.1 |
| Cobalt (Co), % | 58.7 to 68 | |
| 0.2 to 0.65 |
| Copper (Cu), % | 0 | |
| 96 to 98.2 |
| Iron (Fe), % | 0 to 0.75 | |
| 0 to 0.2 |
| Lead (Pb), % | 0 | |
| 0 to 0.020 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 |
| Molybdenum (Mo), % | 5.0 to 7.0 | |
| 0 |
| Nickel (Ni), % | 0 to 0.5 | |
| 0 to 0.2 |
| Nitrogen (N), % | 0 to 0.25 | |
| 0 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 |
| Tin (Sn), % | 0 | |
| 0 to 0.1 |
| Titanium (Ti), % | 0 to 0.1 | |
| 0 to 0.12 |
| Tungsten (W), % | 0 to 0.2 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0 to 0.1 |
| Residuals, % | 0 | |
| 0 to 0.5 |