C66900 Brass vs. R31538 Cobalt
C66900 brass belongs to the copper alloys classification, while R31538 cobalt belongs to the cobalt alloys. There are 24 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is C66900 brass and the bottom bar is R31538 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 120 | |
| 220 |
| Elongation at Break, % | 1.1 to 26 | |
| 13 to 23 |
| Poisson's Ratio | 0.32 | |
| 0.29 |
| Shear Modulus, GPa | 45 | |
| 86 |
| Tensile Strength: Ultimate (UTS), MPa | 460 to 770 | |
| 1020 to 1360 |
| Tensile Strength: Yield (Proof), MPa | 330 to 760 | |
| 580 to 930 |
Thermal Properties
| Latent Heat of Fusion, J/g | 190 | |
| 320 |
| Melting Completion (Liquidus), °C | 860 | |
| 1360 |
| Melting Onset (Solidus), °C | 850 | |
| 1290 |
| Specific Heat Capacity, J/kg-K | 400 | |
| 450 |
| Thermal Expansion, µm/m-K | 20 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 3.4 | |
| 2.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 3.8 | |
| 2.1 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.2 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 2.8 | |
| 8.1 |
| Embodied Energy, MJ/kg | 46 | |
| 110 |
| Embodied Water, L/kg | 310 | |
| 530 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 4.6 to 200 | |
| 140 to 200 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 460 to 2450 | |
| 750 to 1920 |
| Stiffness to Weight: Axial, points | 8.1 | |
| 15 |
| Stiffness to Weight: Bending, points | 20 | |
| 24 |
| Strength to Weight: Axial, points | 15 to 26 | |
| 34 to 45 |
| Strength to Weight: Bending, points | 16 to 23 | |
| 27 to 32 |
| Thermal Shock Resistance, points | 14 to 23 | |
| 25 to 33 |
Alloy Composition
| Carbon (C), % | 0 | |
| 0.15 to 0.35 |
| Chromium (Cr), % | 0 | |
| 26 to 30 |
| Cobalt (Co), % | 0 | |
| 58.7 to 68.9 |
| Copper (Cu), % | 62.5 to 64.5 | |
| 0 |
| Iron (Fe), % | 0 to 0.25 | |
| 0 to 0.75 |
| Lead (Pb), % | 0 to 0.050 | |
| 0 |
| Manganese (Mn), % | 11.5 to 12.5 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 0 | |
| 5.0 to 7.0 |
| Nickel (Ni), % | 0 | |
| 0 to 1.0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.25 |
| Silicon (Si), % | 0 | |
| 0 to 1.0 |
| Zinc (Zn), % | 22.5 to 26 | |
| 0 |
| Residuals, % | 0 to 0.2 | |
| 0 |