R30816 Cobalt vs. Monel R-405
R30816 cobalt belongs to the cobalt alloys classification, while Monel R-405 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 (8, in this case) are not shown.
For each property being compared, the top bar is R30816 cobalt and the bottom bar is Monel R-405.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 160 |
| Elongation at Break, % | 23 | |
| 9.1 to 39 |
| Fatigue Strength, MPa | 250 | |
| 210 to 250 |
| Poisson's Ratio | 0.3 | |
| 0.32 |
| Shear Modulus, GPa | 81 | |
| 62 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 540 to 630 |
| Tensile Strength: Yield (Proof), MPa | 460 | |
| 190 to 350 |
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 | |
| 49 to 170 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 | |
| 120 to 370 |
| Stiffness to Weight: Axial, points | 13 | |
| 10 |
| Stiffness to Weight: Bending, points | 22 | |
| 21 |
| Strength to Weight: Axial, points | 31 | |
| 17 to 20 |
| Strength to Weight: Bending, points | 25 | |
| 17 to 18 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 5.9 |
| Thermal Shock Resistance, points | 28 | |
| 17 to 20 |
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 | |
| 0.025 to 0.060 |
| Tantalum (Ta), % | 3.5 to 4.5 | |
| 0 |
| Tungsten (W), % | 3.5 to 4.5 | |
| 0 |