C72800 Copper-nickel vs. R30035 Cobalt
C72800 copper-nickel belongs to the copper alloys classification, while R30035 cobalt belongs to the cobalt alloys. There are 27 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is C72800 copper-nickel and the bottom bar is R30035 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 120 | |
| 220 to 230 |
| Elongation at Break, % | 3.9 to 23 | |
| 9.0 to 46 |
| Poisson's Ratio | 0.34 | |
| 0.29 |
| Shear Modulus, GPa | 44 | |
| 84 to 89 |
| Tensile Strength: Ultimate (UTS), MPa | 520 to 1270 | |
| 900 to 1900 |
| Tensile Strength: Yield (Proof), MPa | 250 to 1210 | |
| 300 to 1650 |
Thermal Properties
| Latent Heat of Fusion, J/g | 210 | |
| 320 |
| Melting Completion (Liquidus), °C | 1080 | |
| 1440 |
| Melting Onset (Solidus), °C | 920 | |
| 1320 |
| Specific Heat Capacity, J/kg-K | 380 | |
| 440 |
| Thermal Conductivity, W/m-K | 55 | |
| 11 |
| Thermal Expansion, µm/m-K | 17 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 11 | |
| 1.7 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 11 | |
| 1.8 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 38 | |
| 100 |
| Density, g/cm3 | 8.8 | |
| 8.7 |
| Embodied Carbon, kg CO2/kg material | 4.4 | |
| 10 |
| Embodied Energy, MJ/kg | 68 | |
| 140 |
| Embodied Water, L/kg | 360 | |
| 410 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 37 to 99 | |
| 160 to 320 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 260 to 5650 | |
| 210 to 5920 |
| Stiffness to Weight: Axial, points | 7.4 | |
| 14 to 15 |
| Stiffness to Weight: Bending, points | 19 | |
| 23 to 24 |
| Strength to Weight: Axial, points | 17 to 40 | |
| 29 to 61 |
| Strength to Weight: Bending, points | 16 to 30 | |
| 24 to 39 |
| Thermal Diffusivity, mm2/s | 17 | |
| 3.0 |
| Thermal Shock Resistance, points | 19 to 45 | |
| 23 to 46 |
Alloy Composition
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| Aluminum (Al), % | 0 to 0.1 | |
| 0 |
| Antimony (Sb), % | 0 to 0.020 | |
| 0 |
| Bismuth (Bi), % | 0 to 0.0010 | |
| 0 |
| Boron (B), % | 0 to 0.0010 | |
| 0 to 0.015 |
| Carbon (C), % | 0 | |
| 0 to 0.025 |
| Chromium (Cr), % | 0 | |
| 19 to 21 |
| Cobalt (Co), % | 0 | |
| 29.1 to 39 |
| Copper (Cu), % | 78.3 to 82.8 | |
| 0 |
| Iron (Fe), % | 0 to 0.5 | |
| 0 to 1.0 |
| Lead (Pb), % | 0 to 0.0050 | |
| 0 |
| Magnesium (Mg), % | 0.0050 to 0.15 | |
| 0 |
| Manganese (Mn), % | 0.050 to 0.3 | |
| 0 to 0.15 |
| Molybdenum (Mo), % | 0 | |
| 9.0 to 10.5 |
| Nickel (Ni), % | 9.5 to 10.5 | |
| 33 to 37 |
| Niobium (Nb), % | 0.1 to 0.3 | |
| 0 |
| Phosphorus (P), % | 0 to 0.0050 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 to 0.050 | |
| 0 to 0.15 |
| Sulfur (S), % | 0 to 0.0025 | |
| 0 to 0.010 |
| Tin (Sn), % | 7.5 to 8.5 | |
| 0 |
| Titanium (Ti), % | 0 to 0.010 | |
| 0 to 1.0 |
| Zinc (Zn), % | 0 to 1.0 | |
| 0 |
| Residuals, % | 0 to 0.3 | |
| 0 |