R30816 Cobalt vs. Monel 400
R30816 cobalt belongs to the cobalt alloys classification, while Monel 400 belongs to the nickel alloys. They have a modest 23% of their average alloy composition in common, which, by itself, doesn't mean much. There are 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is R30816 cobalt and the bottom bar is Monel 400.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 160 |
| Elongation at Break, % | 23 | |
| 20 to 40 |
| Fatigue Strength, MPa | 250 | |
| 230 to 290 |
| Poisson's Ratio | 0.3 | |
| 0.32 |
| Shear Modulus, GPa | 81 | |
| 62 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 540 to 780 |
| Tensile Strength: Yield (Proof), MPa | 460 | |
| 210 to 590 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 270 |
| Melting Completion (Liquidus), °C | 1540 | |
| 1350 |
| Melting Onset (Solidus), °C | 1460 | |
| 1300 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 430 |
| Thermal Conductivity, W/m-K | 13 | |
| 23 |
| Thermal Expansion, µm/m-K | 12 | |
| 14 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.1 | |
| 8.9 |
| Embodied Carbon, kg CO2/kg material | 20 | |
| 7.9 |
| Embodied Energy, MJ/kg | 320 | |
| 110 |
| Embodied Water, L/kg | 440 | |
| 250 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
| 140 to 180 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 | |
| 140 to 1080 |
| Stiffness to Weight: Axial, points | 13 | |
| 10 |
| Stiffness to Weight: Bending, points | 22 | |
| 21 |
| Strength to Weight: Axial, points | 31 | |
| 17 to 25 |
| Strength to Weight: Bending, points | 25 | |
| 17 to 21 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 6.1 |
| Thermal Shock Resistance, points | 28 | |
| 17 to 25 |
Alloy Composition
| Carbon (C), % | 0.32 to 0.42 | |
| 0 to 0.3 |
| Chromium (Cr), % | 19 to 21 | |
| 0 |
| Cobalt (Co), % | 40 to 49.8 | |
| 0 |
| Copper (Cu), % | 0 | |
| 28 to 34 |
| Iron (Fe), % | 0 to 5.0 | |
| 0 to 2.5 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 3.5 to 4.5 | |
| 0 |
| Nickel (Ni), % | 19 to 21 | |
| 63 to 72 |
| 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 0.024 |
| Tantalum (Ta), % | 3.5 to 4.5 | |
| 0 |
| Tungsten (W), % | 3.5 to 4.5 | |
| 0 |