R31539 Cobalt vs. C18700 Copper
R31539 cobalt belongs to the cobalt alloys classification, while C18700 copper belongs to the copper 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 R31539 cobalt and the bottom bar is C18700 copper.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 110 |
| Elongation at Break, % | 13 to 22 | |
| 9.0 to 9.6 |
| Poisson's Ratio | 0.29 | |
| 0.34 |
| Shear Modulus, GPa | 86 | |
| 43 |
| Tensile Strength: Ultimate (UTS), MPa | 1000 to 1340 | |
| 290 to 330 |
| Tensile Strength: Yield (Proof), MPa | 590 to 940 | |
| 230 to 250 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 210 |
| Melting Completion (Liquidus), °C | 1360 | |
| 1080 |
| Melting Onset (Solidus), °C | 1290 | |
| 950 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 380 |
| Thermal Conductivity, W/m-K | 13 | |
| 380 |
| Thermal Expansion, µm/m-K | 13 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 98 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 99 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 9.0 |
| Embodied Carbon, kg CO2/kg material | 8.2 | |
| 2.6 |
| Embodied Energy, MJ/kg | 110 | |
| 41 |
| Embodied Water, L/kg | 530 | |
| 310 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 190 | |
| 24 to 29 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 780 to 2000 | |
| 240 to 280 |
| Stiffness to Weight: Axial, points | 15 | |
| 7.1 |
| Stiffness to Weight: Bending, points | 24 | |
| 18 |
| Strength to Weight: Axial, points | 33 to 44 | |
| 9.0 to 10 |
| Strength to Weight: Bending, points | 27 to 32 | |
| 11 to 12 |
| Thermal Diffusivity, mm2/s | 3.5 | |
| 110 |
| Thermal Shock Resistance, points | 24 to 32 | |
| 10 to 12 |
Alloy Composition
Deprecated: Automatic conversion of false to array is deprecated in /home/public/compare.php on line 460
| Aluminum (Al), % | 0.3 to 1.0 | |
| 0 |
| Carbon (C), % | 0 to 0.14 | |
| 0 |
| Chromium (Cr), % | 26 to 30 | |
| 0 |
| Cobalt (Co), % | 57.7 to 68.7 | |
| 0 |
| Copper (Cu), % | 0 | |
| 98 to 99.2 |
| Iron (Fe), % | 0 to 0.75 | |
| 0 |
| Lanthanum (La), % | 0.030 to 0.2 | |
| 0 |
| Lead (Pb), % | 0 | |
| 0.8 to 1.5 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 |
| Molybdenum (Mo), % | 5.0 to 7.0 | |
| 0 |
| Nickel (Ni), % | 0 to 1.0 | |
| 0 |
| Nitrogen (N), % | 0 to 0.25 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.5 |