R30035 Cobalt vs. EN 2.4878 Nickel
R30035 cobalt belongs to the cobalt alloys classification, while EN 2.4878 nickel belongs to the nickel alloys. They have 78% of their average alloy composition in common. There are 26 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 R30035 cobalt and the bottom bar is EN 2.4878 nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 to 230 | |
| 200 |
| Elongation at Break, % | 9.0 to 46 | |
| 13 to 17 |
| Fatigue Strength, MPa | 170 to 740 | |
| 400 to 410 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 84 to 89 | |
| 78 |
| Tensile Strength: Ultimate (UTS), MPa | 900 to 1900 | |
| 1210 to 1250 |
| Tensile Strength: Yield (Proof), MPa | 300 to 1650 | |
| 740 to 780 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 330 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1370 |
| Melting Onset (Solidus), °C | 1320 | |
| 1320 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 460 |
| Thermal Conductivity, W/m-K | 11 | |
| 11 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 100 | |
| 80 |
| Density, g/cm3 | 8.7 | |
| 8.3 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 10 |
| Embodied Energy, MJ/kg | 140 | |
| 150 |
| Embodied Water, L/kg | 410 | |
| 370 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 to 320 | |
| 150 to 180 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 210 to 5920 | |
| 1370 to 1540 |
| Stiffness to Weight: Axial, points | 14 to 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 to 24 | |
| 24 |
| Strength to Weight: Axial, points | 29 to 61 | |
| 41 to 42 |
| Strength to Weight: Bending, points | 24 to 39 | |
| 31 |
| Thermal Diffusivity, mm2/s | 3.0 | |
| 2.8 |
| Thermal Shock Resistance, points | 23 to 46 | |
| 37 to 39 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 1.2 to 1.6 |
| Boron (B), % | 0 to 0.015 | |
| 0.010 to 0.015 |
| Carbon (C), % | 0 to 0.025 | |
| 0.030 to 0.070 |
| Chromium (Cr), % | 19 to 21 | |
| 23 to 25 |
| Cobalt (Co), % | 29.1 to 39 | |
| 19 to 21 |
| Copper (Cu), % | 0 | |
| 0 to 0.2 |
| Iron (Fe), % | 0 to 1.0 | |
| 0 to 1.0 |
| Manganese (Mn), % | 0 to 0.15 | |
| 0 to 0.5 |
| Molybdenum (Mo), % | 9.0 to 10.5 | |
| 1.0 to 2.0 |
| Nickel (Ni), % | 33 to 37 | |
| 43.6 to 52.2 |
| Niobium (Nb), % | 0 | |
| 0.7 to 1.2 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 0.15 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.0070 |
| Tantalum (Ta), % | 0 | |
| 0 to 0.050 |
| Titanium (Ti), % | 0 to 1.0 | |
| 2.8 to 3.2 |
| Zirconium (Zr), % | 0 | |
| 0.030 to 0.070 |