R30605 Cobalt vs. EN 2.4878 Nickel
R30605 cobalt belongs to the cobalt alloys classification, while EN 2.4878 nickel belongs to the nickel alloys. They have 51% of their average alloy composition in common. There are 23 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 R30605 cobalt and the bottom bar is EN 2.4878 nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 200 |
| Elongation at Break, % | 34 | |
| 13 to 17 |
| Fatigue Strength, MPa | 260 to 590 | |
| 400 to 410 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 81 | |
| 78 |
| Tensile Strength: Ultimate (UTS), MPa | 1130 to 1900 | |
| 1210 to 1250 |
| Tensile Strength: Yield (Proof), MPa | 470 to 1600 | |
| 740 to 780 |
Thermal Properties
| Latent Heat of Fusion, J/g | 290 | |
| 330 |
| Melting Completion (Liquidus), °C | 1410 | |
| 1370 |
| Melting Onset (Solidus), °C | 1330 | |
| 1320 |
| Specific Heat Capacity, J/kg-K | 410 | |
| 460 |
| Thermal Conductivity, W/m-K | 9.6 | |
| 11 |
| Thermal Expansion, µm/m-K | 12 | |
| 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.6 | |
| 8.3 |
| Embodied Carbon, kg CO2/kg material | 9.8 | |
| 10 |
| Embodied Energy, MJ/kg | 140 | |
| 150 |
| Embodied Water, L/kg | 450 | |
| 370 |
Common Calculations
| Stiffness to Weight: Axial, points | 12 | |
| 13 |
| Stiffness to Weight: Bending, points | 21 | |
| 24 |
| Strength to Weight: Axial, points | 33 to 55 | |
| 41 to 42 |
| Strength to Weight: Bending, points | 25 to 36 | |
| 31 |
| Thermal Diffusivity, mm2/s | 2.5 | |
| 2.8 |
| Thermal Shock Resistance, points | 31 to 52 | |
| 37 to 39 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 1.2 to 1.6 |
| Boron (B), % | 0 | |
| 0.010 to 0.015 |
| Carbon (C), % | 0.050 to 0.15 | |
| 0.030 to 0.070 |
| Chromium (Cr), % | 19 to 21 | |
| 23 to 25 |
| Cobalt (Co), % | 46.4 to 57 | |
| 19 to 21 |
| Copper (Cu), % | 0 | |
| 0 to 0.2 |
| Iron (Fe), % | 0 to 3.0 | |
| 0 to 1.0 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 0.5 |
| Molybdenum (Mo), % | 0 | |
| 1.0 to 2.0 |
| Nickel (Ni), % | 9.0 to 11 | |
| 43.6 to 52.2 |
| Niobium (Nb), % | 0 | |
| 0.7 to 1.2 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 0.4 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.0070 |
| Tantalum (Ta), % | 0 | |
| 0 to 0.050 |
| Titanium (Ti), % | 0 | |
| 2.8 to 3.2 |
| Tungsten (W), % | 14 to 16 | |
| 0 |
| Zirconium (Zr), % | 0 | |
| 0.030 to 0.070 |