R30155 Cobalt vs. C71500 Copper-nickel
R30155 cobalt belongs to the iron alloys classification, while C71500 copper-nickel belongs to the copper alloys. They have a modest 21% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.
For each property being compared, the top bar is R30155 cobalt and the bottom bar is C71500 copper-nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 140 |
| Poisson's Ratio | 0.29 | |
| 0.33 |
| Shear Modulus, GPa | 81 | |
| 52 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 380 to 620 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 230 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 260 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1240 |
| Melting Onset (Solidus), °C | 1420 | |
| 1170 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 400 |
| Thermal Conductivity, W/m-K | 12 | |
| 28 |
| Thermal Expansion, µm/m-K | 14 | |
| 16 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 41 |
| Density, g/cm3 | 8.5 | |
| 8.9 |
| Embodied Carbon, kg CO2/kg material | 9.7 | |
| 5.1 |
| Embodied Energy, MJ/kg | 150 | |
| 74 |
| Embodied Water, L/kg | 300 | |
| 280 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 8.6 |
| Stiffness to Weight: Bending, points | 23 | |
| 19 |
| Strength to Weight: Axial, points | 28 | |
| 12 to 19 |
| Strength to Weight: Bending, points | 24 | |
| 13 to 18 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 7.7 |
| Thermal Shock Resistance, points | 21 | |
| 12 to 20 |
Alloy Composition
| Carbon (C), % | 0.080 to 0.16 | |
| 0 |
| Chromium (Cr), % | 20 to 22.5 | |
| 0 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0 |
| Copper (Cu), % | 0 | |
| 63.5 to 70.6 |
| Iron (Fe), % | 24.3 to 36.2 | |
| 0.4 to 1.0 |
| Lead (Pb), % | 0 | |
| 0 to 0.050 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 2.5 to 3.5 | |
| 0 |
| Nickel (Ni), % | 19 to 21 | |
| 29 to 33 |
| Niobium (Nb), % | 0.75 to 1.3 | |
| 0 |
| Nitrogen (N), % | 0 to 0.2 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Tantalum (Ta), % | 0.75 to 1.3 | |
| 0 |
| Tungsten (W), % | 2.0 to 3.0 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0 to 1.0 |
| Residuals, % | 0 | |
| 0 to 0.5 |