C71580 Copper-nickel vs. R30155 Cobalt
C71580 copper-nickel belongs to the copper alloys classification, while R30155 cobalt belongs to the iron alloys. They have a modest 20% of their average alloy composition in common, which, by itself, doesn't mean much. There are 28 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 C71580 copper-nickel and the bottom bar is R30155 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 75 | |
| 220 |
| Elastic (Young's, Tensile) Modulus, GPa | 140 | |
| 210 |
| Elongation at Break, % | 40 | |
| 34 |
| Poisson's Ratio | 0.33 | |
| 0.29 |
| Shear Modulus, GPa | 51 | |
| 81 |
| Shear Strength, MPa | 230 | |
| 570 |
| Tensile Strength: Ultimate (UTS), MPa | 330 | |
| 850 |
| Tensile Strength: Yield (Proof), MPa | 110 | |
| 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 230 | |
| 300 |
| Maximum Temperature: Mechanical, °C | 260 | |
| 1100 |
| Melting Completion (Liquidus), °C | 1180 | |
| 1470 |
| Melting Onset (Solidus), °C | 1120 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 400 | |
| 450 |
| Thermal Conductivity, W/m-K | 39 | |
| 12 |
| Thermal Expansion, µm/m-K | 15 | |
| 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 41 | |
| 80 |
| Density, g/cm3 | 8.9 | |
| 8.5 |
| Embodied Carbon, kg CO2/kg material | 5.1 | |
| 9.7 |
| Embodied Energy, MJ/kg | 74 | |
| 150 |
| Embodied Water, L/kg | 280 | |
| 300 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 100 | |
| 230 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 47 | |
| 370 |
| Stiffness to Weight: Axial, points | 8.5 | |
| 14 |
| Stiffness to Weight: Bending, points | 19 | |
| 23 |
| Strength to Weight: Axial, points | 10 | |
| 28 |
| Strength to Weight: Bending, points | 12 | |
| 24 |
| Thermal Diffusivity, mm2/s | 11 | |
| 3.2 |
| Thermal Shock Resistance, points | 11 | |
| 21 |
Alloy Composition
| Carbon (C), % | 0 to 0.070 | |
| 0.080 to 0.16 |
| Chromium (Cr), % | 0 | |
| 20 to 22.5 |
| Cobalt (Co), % | 0 | |
| 18.5 to 21 |
| Copper (Cu), % | 65.5 to 71 | |
| 0 |
| Iron (Fe), % | 0 to 0.5 | |
| 24.3 to 36.2 |
| Lead (Pb), % | 0 to 0.050 | |
| 0 |
| Manganese (Mn), % | 0 to 0.3 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 0 | |
| 2.5 to 3.5 |
| Nickel (Ni), % | 29 to 33 | |
| 19 to 21 |
| Niobium (Nb), % | 0 | |
| 0.75 to 1.3 |
| Nitrogen (N), % | 0 | |
| 0 to 0.2 |
| Phosphorus (P), % | 0 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0 | |
| 0.75 to 1.3 |
| Tungsten (W), % | 0 | |
| 2.0 to 3.0 |
| Zinc (Zn), % | 0 to 0.050 | |
| 0 |
| Residuals, % | 0 to 0.5 | |
| 0 |