R30021 Cobalt vs. Nickel 601
R30021 cobalt belongs to the cobalt alloys classification, while nickel 601 belongs to the nickel alloys. They have a modest 27% of their average alloy composition in common, which, by itself, doesn't mean much. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is R30021 cobalt and the bottom bar is nickel 601.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 200 |
| Elongation at Break, % | 9.0 | |
| 10 to 38 |
| Fatigue Strength, MPa | 250 | |
| 220 to 380 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 86 | |
| 76 |
| Tensile Strength: Ultimate (UTS), MPa | 700 | |
| 660 to 890 |
| Tensile Strength: Yield (Proof), MPa | 500 | |
| 290 to 800 |
Thermal Properties
| Latent Heat of Fusion, J/g | 330 | |
| 320 |
| Melting Completion (Liquidus), °C | 1350 | |
| 1410 |
| Melting Onset (Solidus), °C | 1190 | |
| 1360 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Conductivity, W/m-K | 15 | |
| 11 |
| Thermal Expansion, µm/m-K | 11 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.9 | |
| 1.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 1.6 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 8.3 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 8.0 |
| Embodied Energy, MJ/kg | 110 | |
| 110 |
| Embodied Water, L/kg | 520 | |
| 280 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 57 | |
| 86 to 200 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 570 | |
| 210 to 1630 |
| Stiffness to Weight: Axial, points | 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 23 |
| Strength to Weight: Axial, points | 23 | |
| 22 to 30 |
| Strength to Weight: Bending, points | 21 | |
| 20 to 25 |
| Thermal Diffusivity, mm2/s | 3.8 | |
| 2.8 |
| Thermal Shock Resistance, points | 21 | |
| 17 to 23 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 1.0 to 1.7 |
| Carbon (C), % | 0.2 to 0.35 | |
| 0 to 0.1 |
| Chromium (Cr), % | 26 to 29 | |
| 21 to 25 |
| Cobalt (Co), % | 61.7 to 67.3 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 1.0 |
| Iron (Fe), % | 0 to 3.0 | |
| 7.7 to 20 |
| Manganese (Mn), % | 0 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 4.5 to 6.0 | |
| 0 |
| Nickel (Ni), % | 2.0 to 3.0 | |
| 58 to 63 |
| Silicon (Si), % | 0 to 1.5 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 | |
| 0 to 0.015 |