R30021 Cobalt vs. Grade 8 Babbitt Metal
R30021 cobalt belongs to the cobalt alloys classification, while grade 8 Babbitt Metal belongs to the otherwise unclassified metals. There are 19 material properties with values for both materials. Properties with values for just one material (12, in this case) are not shown.
For each property being compared, the top bar is R30021 cobalt and the bottom bar is grade 8 Babbitt Metal.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 1300 | |
| 110 |
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 24 |
| Poisson's Ratio | 0.29 | |
| 0.41 |
| Shear Modulus, GPa | 86 | |
| 8.5 |
| Tensile Strength: Yield (Proof), MPa | 500 | |
| 23 |
Thermal Properties
| Latent Heat of Fusion, J/g | 330 | |
| 46 |
| Melting Completion (Liquidus), °C | 1350 | |
| 270 |
| Melting Onset (Solidus), °C | 1190 | |
| 240 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 150 |
| Thermal Conductivity, W/m-K | 15 | |
| 24 |
| Thermal Expansion, µm/m-K | 11 | |
| 24 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 10 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 3.9 |
| Embodied Energy, MJ/kg | 110 | |
| 53 |
| Embodied Water, L/kg | 520 | |
| 840 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 570 | |
| 11 |
| Stiffness to Weight: Axial, points | 15 | |
| 1.3 |
| Stiffness to Weight: Bending, points | 24 | |
| 9.2 |
| Thermal Diffusivity, mm2/s | 3.8 | |
| 16 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.0050 |
| Antimony (Sb), % | 0 | |
| 14 to 16 |
| Arsenic (As), % | 0 | |
| 0.3 to 0.6 |
| Bismuth (Bi), % | 0 | |
| 0 to 0.1 |
| Cadmium (Cd), % | 0 | |
| 0 to 0.050 |
| Carbon (C), % | 0.2 to 0.35 | |
| 0 |
| Chromium (Cr), % | 26 to 29 | |
| 0 |
| Cobalt (Co), % | 61.7 to 67.3 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 0.5 |
| Iron (Fe), % | 0 to 3.0 | |
| 0 to 0.1 |
| Lead (Pb), % | 0 | |
| 77.1 to 81.2 |
| Molybdenum (Mo), % | 4.5 to 6.0 | |
| 0 |
| Nickel (Ni), % | 2.0 to 3.0 | |
| 0 |
| Silicon (Si), % | 0 to 1.5 | |
| 0 |
| Tin (Sn), % | 0 | |
| 4.5 to 5.5 |
| Zinc (Zn), % | 0 | |
| 0 to 0.0050 |