R30021 Cobalt vs. Monel 400
R30021 cobalt belongs to the cobalt alloys classification, while Monel 400 belongs to the nickel alloys. There are 27 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 R30021 cobalt and the bottom bar is Monel 400.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 160 |
| Elongation at Break, % | 9.0 | |
| 20 to 40 |
| Fatigue Strength, MPa | 250 | |
| 230 to 290 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Shear Modulus, GPa | 86 | |
| 62 |
| Tensile Strength: Ultimate (UTS), MPa | 700 | |
| 540 to 780 |
| Tensile Strength: Yield (Proof), MPa | 500 | |
| 210 to 590 |
Thermal Properties
| Latent Heat of Fusion, J/g | 330 | |
| 270 |
| Melting Completion (Liquidus), °C | 1350 | |
| 1350 |
| Melting Onset (Solidus), °C | 1190 | |
| 1300 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 430 |
| Thermal Conductivity, W/m-K | 15 | |
| 23 |
| Thermal Expansion, µm/m-K | 11 | |
| 14 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.9 | |
| 3.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 3.4 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 8.9 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 7.9 |
| Embodied Energy, MJ/kg | 110 | |
| 110 |
| Embodied Water, L/kg | 520 | |
| 250 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 57 | |
| 140 to 180 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 570 | |
| 140 to 1080 |
| Stiffness to Weight: Axial, points | 15 | |
| 10 |
| Stiffness to Weight: Bending, points | 24 | |
| 21 |
| Strength to Weight: Axial, points | 23 | |
| 17 to 25 |
| Strength to Weight: Bending, points | 21 | |
| 17 to 21 |
| Thermal Diffusivity, mm2/s | 3.8 | |
| 6.1 |
| Thermal Shock Resistance, points | 21 | |
| 17 to 25 |
Alloy Composition
| Carbon (C), % | 0.2 to 0.35 | |
| 0 to 0.3 |
| Chromium (Cr), % | 26 to 29 | |
| 0 |
| Cobalt (Co), % | 61.7 to 67.3 | |
| 0 |
| Copper (Cu), % | 0 | |
| 28 to 34 |
| Iron (Fe), % | 0 to 3.0 | |
| 0 to 2.5 |
| Manganese (Mn), % | 0 | |
| 0 to 2.0 |
| Molybdenum (Mo), % | 4.5 to 6.0 | |
| 0 |
| Nickel (Ni), % | 2.0 to 3.0 | |
| 63 to 72 |
| Silicon (Si), % | 0 to 1.5 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 | |
| 0 to 0.024 |