EN 2.4878 Nickel vs. R31538 Cobalt
EN 2.4878 nickel belongs to the nickel alloys classification, while R31538 cobalt belongs to the cobalt alloys. They have 47% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is EN 2.4878 nickel and the bottom bar is R31538 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 220 |
| Elongation at Break, % | 13 to 17 | |
| 13 to 23 |
| Fatigue Strength, MPa | 400 to 410 | |
| 310 to 480 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 78 | |
| 86 |
| Tensile Strength: Ultimate (UTS), MPa | 1210 to 1250 | |
| 1020 to 1360 |
| Tensile Strength: Yield (Proof), MPa | 740 to 780 | |
| 580 to 930 |
Thermal Properties
| Latent Heat of Fusion, J/g | 330 | |
| 320 |
| Melting Completion (Liquidus), °C | 1370 | |
| 1360 |
| Melting Onset (Solidus), °C | 1320 | |
| 1290 |
| Specific Heat Capacity, J/kg-K | 460 | |
| 450 |
| Thermal Conductivity, W/m-K | 11 | |
| 13 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.3 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 8.1 |
| Embodied Energy, MJ/kg | 150 | |
| 110 |
| Embodied Water, L/kg | 370 | |
| 530 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 150 to 180 | |
| 140 to 200 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1370 to 1540 | |
| 750 to 1920 |
| Stiffness to Weight: Axial, points | 13 | |
| 15 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 41 to 42 | |
| 34 to 45 |
| Strength to Weight: Bending, points | 31 | |
| 27 to 32 |
| Thermal Diffusivity, mm2/s | 2.8 | |
| 3.5 |
| Thermal Shock Resistance, points | 37 to 39 | |
| 25 to 33 |
Alloy Composition
| Aluminum (Al), % | 1.2 to 1.6 | |
| 0 |
| Boron (B), % | 0.010 to 0.015 | |
| 0 |
| Carbon (C), % | 0.030 to 0.070 | |
| 0.15 to 0.35 |
| Chromium (Cr), % | 23 to 25 | |
| 26 to 30 |
| Cobalt (Co), % | 19 to 21 | |
| 58.7 to 68.9 |
| Copper (Cu), % | 0 to 0.2 | |
| 0 |
| Iron (Fe), % | 0 to 1.0 | |
| 0 to 0.75 |
| Manganese (Mn), % | 0 to 0.5 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 1.0 to 2.0 | |
| 5.0 to 7.0 |
| Nickel (Ni), % | 43.6 to 52.2 | |
| 0 to 1.0 |
| Niobium (Nb), % | 0.7 to 1.2 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.25 |
| Phosphorus (P), % | 0 to 0.010 | |
| 0 |
| Silicon (Si), % | 0 to 0.5 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.0070 | |
| 0 |
| Tantalum (Ta), % | 0 to 0.050 | |
| 0 |
| Titanium (Ti), % | 2.8 to 3.2 | |
| 0 |
| Zirconium (Zr), % | 0.030 to 0.070 | |
| 0 |