R30605 Cobalt vs. C72700 Copper-nickel
R30605 cobalt belongs to the cobalt alloys classification, while C72700 copper-nickel belongs to the copper alloys. There are 24 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 R30605 cobalt and the bottom bar is C72700 copper-nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 120 |
| Elongation at Break, % | 34 | |
| 4.0 to 36 |
| Poisson's Ratio | 0.29 | |
| 0.34 |
| Shear Modulus, GPa | 81 | |
| 44 |
| Tensile Strength: Ultimate (UTS), MPa | 1130 to 1900 | |
| 460 to 1070 |
| Tensile Strength: Yield (Proof), MPa | 470 to 1600 | |
| 580 to 1060 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 210 |
| Melting Completion (Liquidus), °C | 1410 | |
| 1100 |
| Melting Onset (Solidus), °C | 1330 | |
| 930 |
| Specific Heat Capacity, J/kg-K | 410 | |
| 380 |
| Thermal Conductivity, W/m-K | 9.6 | |
| 54 |
| Thermal Expansion, µm/m-K | 12 | |
| 17 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 11 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.8 | |
| 11 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.6 | |
| 8.8 |
| Embodied Carbon, kg CO2/kg material | 9.8 | |
| 4.0 |
| Embodied Energy, MJ/kg | 140 | |
| 62 |
| Embodied Water, L/kg | 450 | |
| 350 |
Common Calculations
| Stiffness to Weight: Axial, points | 12 | |
| 7.4 |
| Stiffness to Weight: Bending, points | 21 | |
| 19 |
| Strength to Weight: Axial, points | 33 to 55 | |
| 14 to 34 |
| Strength to Weight: Bending, points | 25 to 36 | |
| 15 to 26 |
| Thermal Diffusivity, mm2/s | 2.5 | |
| 16 |
| Thermal Shock Resistance, points | 31 to 52 | |
| 16 to 38 |
Alloy Composition
Deprecated: Automatic conversion of false to array is deprecated in /home/public/compare.php on line 460
| Carbon (C), % | 0.050 to 0.15 | |
| 0 |
| Chromium (Cr), % | 19 to 21 | |
| 0 |
| Cobalt (Co), % | 46.4 to 57 | |
| 0 |
| Copper (Cu), % | 0 | |
| 82.1 to 86 |
| Iron (Fe), % | 0 to 3.0 | |
| 0 to 0.5 |
| Lead (Pb), % | 0 | |
| 0 to 0.020 |
| Magnesium (Mg), % | 0 | |
| 0 to 0.15 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0.050 to 0.3 |
| Nickel (Ni), % | 9.0 to 11 | |
| 8.5 to 9.5 |
| Niobium (Nb), % | 0 | |
| 0 to 0.1 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 0 to 0.4 | |
| 0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Tin (Sn), % | 0 | |
| 5.5 to 6.5 |
| Tungsten (W), % | 14 to 16 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0 to 0.5 |
| Residuals, % | 0 | |
| 0 to 0.3 |