R30021 Cobalt vs. C99750 Brass
R30021 cobalt belongs to the cobalt alloys classification, while C99750 brass belongs to the copper alloys. There are 24 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 R30021 cobalt and the bottom bar is C99750 brass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 130 |
| Elongation at Break, % | 9.0 | |
| 20 to 30 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Shear Modulus, GPa | 86 | |
| 48 |
| Tensile Strength: Ultimate (UTS), MPa | 700 | |
| 450 to 520 |
| Tensile Strength: Yield (Proof), MPa | 500 | |
| 220 to 280 |
Thermal Properties
| Latent Heat of Fusion, J/g | 330 | |
| 200 |
| Melting Completion (Liquidus), °C | 1350 | |
| 840 |
| Melting Onset (Solidus), °C | 1190 | |
| 820 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 410 |
| Thermal Expansion, µm/m-K | 11 | |
| 20 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.9 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 2.2 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 8.1 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 3.1 |
| Embodied Energy, MJ/kg | 110 | |
| 51 |
| Embodied Water, L/kg | 520 | |
| 310 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 57 | |
| 87 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 570 | |
| 190 to 300 |
| Stiffness to Weight: Axial, points | 15 | |
| 8.6 |
| Stiffness to Weight: Bending, points | 24 | |
| 21 |
| Strength to Weight: Axial, points | 23 | |
| 15 to 18 |
| Strength to Weight: Bending, points | 21 | |
| 16 to 18 |
| Thermal Shock Resistance, points | 21 | |
| 13 to 15 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 0.25 to 3.0 |
| 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 | |
| 55 to 61 |
| Iron (Fe), % | 0 to 3.0 | |
| 0 to 1.0 |
| Lead (Pb), % | 0 | |
| 0.5 to 2.5 |
| Manganese (Mn), % | 0 | |
| 17 to 23 |
| Molybdenum (Mo), % | 4.5 to 6.0 | |
| 0 |
| Nickel (Ni), % | 2.0 to 3.0 | |
| 0 to 5.0 |
| Silicon (Si), % | 0 to 1.5 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 17 to 23 |
| Residuals, % | 0 | |
| 0 to 0.3 |