R30021 Cobalt vs. C63000 Bronze
R30021 cobalt belongs to the cobalt alloys classification, while C63000 bronze belongs to the copper alloys. 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 R30021 cobalt and the bottom bar is C63000 bronze.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 120 |
| Elongation at Break, % | 9.0 | |
| 7.9 to 15 |
| Poisson's Ratio | 0.29 | |
| 0.34 |
| Shear Modulus, GPa | 86 | |
| 44 |
| Tensile Strength: Ultimate (UTS), MPa | 700 | |
| 660 to 790 |
| Tensile Strength: Yield (Proof), MPa | 500 | |
| 330 to 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 330 | |
| 230 |
| Melting Completion (Liquidus), °C | 1350 | |
| 1050 |
| Melting Onset (Solidus), °C | 1190 | |
| 1040 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 440 |
| Thermal Conductivity, W/m-K | 15 | |
| 39 |
| Thermal Expansion, µm/m-K | 11 | |
| 18 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.9 | |
| 7.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 7.6 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 3.5 |
| Embodied Energy, MJ/kg | 110 | |
| 57 |
| Embodied Water, L/kg | 520 | |
| 390 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 57 | |
| 47 to 82 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 570 | |
| 470 to 640 |
| Stiffness to Weight: Axial, points | 15 | |
| 7.9 |
| Stiffness to Weight: Bending, points | 24 | |
| 20 |
| Strength to Weight: Axial, points | 23 | |
| 22 to 26 |
| Strength to Weight: Bending, points | 21 | |
| 20 to 23 |
| Thermal Diffusivity, mm2/s | 3.8 | |
| 11 |
| Thermal Shock Resistance, points | 21 | |
| 23 to 27 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 9.0 to 11 |
| 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 | |
| 76.8 to 85 |
| Iron (Fe), % | 0 to 3.0 | |
| 2.0 to 4.0 |
| Manganese (Mn), % | 0 | |
| 0 to 1.5 |
| Molybdenum (Mo), % | 4.5 to 6.0 | |
| 0 |
| Nickel (Ni), % | 2.0 to 3.0 | |
| 4.0 to 5.5 |
| Silicon (Si), % | 0 to 1.5 | |
| 0 to 0.25 |
| Tin (Sn), % | 0 | |
| 0 to 0.2 |
| Zinc (Zn), % | 0 | |
| 0 to 0.3 |
| Residuals, % | 0 | |
| 0 to 0.5 |