R30816 Cobalt vs. Nickel 690
R30816 cobalt belongs to the cobalt alloys classification, while nickel 690 belongs to the nickel alloys. They have 43% of their average alloy composition in common. There are 26 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 R30816 cobalt and the bottom bar is nickel 690.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 280 | |
| 90 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 200 |
| Elongation at Break, % | 23 | |
| 3.4 to 34 |
| Fatigue Strength, MPa | 250 | |
| 180 to 300 |
| Poisson's Ratio | 0.3 | |
| 0.28 |
| Shear Modulus, GPa | 81 | |
| 79 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 640 to 990 |
| Tensile Strength: Yield (Proof), MPa | 460 | |
| 250 to 760 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 320 |
| Melting Completion (Liquidus), °C | 1540 | |
| 1380 |
| Melting Onset (Solidus), °C | 1460 | |
| 1340 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 470 |
| Thermal Conductivity, W/m-K | 13 | |
| 14 |
| Thermal Expansion, µm/m-K | 12 | |
| 14 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.1 | |
| 8.3 |
| Embodied Carbon, kg CO2/kg material | 20 | |
| 8.2 |
| Embodied Energy, MJ/kg | 320 | |
| 120 |
| Embodied Water, L/kg | 440 | |
| 290 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
| 31 to 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 | |
| 160 to 1440 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 22 | |
| 24 |
| Strength to Weight: Axial, points | 31 | |
| 21 to 33 |
| Strength to Weight: Bending, points | 25 | |
| 20 to 27 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 3.5 |
| Thermal Shock Resistance, points | 28 | |
| 16 to 25 |
Alloy Composition
| Carbon (C), % | 0.32 to 0.42 | |
| 0 to 0.050 |
| Chromium (Cr), % | 19 to 21 | |
| 27 to 31 |
| Cobalt (Co), % | 40 to 49.8 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 0.5 |
| Iron (Fe), % | 0 to 5.0 | |
| 7.0 to 11 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 0.5 |
| Molybdenum (Mo), % | 3.5 to 4.5 | |
| 0 |
| Nickel (Ni), % | 19 to 21 | |
| 58 to 66 |
| Niobium (Nb), % | 3.5 to 4.5 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.015 |
| Tantalum (Ta), % | 3.5 to 4.5 | |
| 0 |
| Tungsten (W), % | 3.5 to 4.5 | |
| 0 |