R31539 Cobalt vs. C68000 Brass
R31539 cobalt belongs to the cobalt alloys classification, while C68000 brass belongs to the copper alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is R31539 cobalt and the bottom bar is C68000 brass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 100 |
| Elongation at Break, % | 13 to 22 | |
| 27 |
| Poisson's Ratio | 0.29 | |
| 0.3 |
| Shear Modulus, GPa | 86 | |
| 40 |
| Tensile Strength: Ultimate (UTS), MPa | 1000 to 1340 | |
| 390 |
| Tensile Strength: Yield (Proof), MPa | 590 to 940 | |
| 140 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 170 |
| Melting Completion (Liquidus), °C | 1360 | |
| 880 |
| Melting Onset (Solidus), °C | 1290 | |
| 870 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 390 |
| Thermal Conductivity, W/m-K | 13 | |
| 96 |
| Thermal Expansion, µm/m-K | 13 | |
| 21 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 8.0 |
| Embodied Carbon, kg CO2/kg material | 8.2 | |
| 2.8 |
| Embodied Energy, MJ/kg | 110 | |
| 48 |
| Embodied Water, L/kg | 530 | |
| 330 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 190 | |
| 82 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 780 to 2000 | |
| 95 |
| Stiffness to Weight: Axial, points | 15 | |
| 7.3 |
| Stiffness to Weight: Bending, points | 24 | |
| 20 |
| Strength to Weight: Axial, points | 33 to 44 | |
| 14 |
| Strength to Weight: Bending, points | 27 to 32 | |
| 15 |
| Thermal Diffusivity, mm2/s | 3.5 | |
| 31 |
| Thermal Shock Resistance, points | 24 to 32 | |
| 13 |
Alloy Composition
| Aluminum (Al), % | 0.3 to 1.0 | |
| 0 to 0.010 |
| Carbon (C), % | 0 to 0.14 | |
| 0 |
| Chromium (Cr), % | 26 to 30 | |
| 0 |
| Cobalt (Co), % | 57.7 to 68.7 | |
| 0 |
| Copper (Cu), % | 0 | |
| 56 to 60 |
| Iron (Fe), % | 0 to 0.75 | |
| 0.25 to 1.3 |
| Lanthanum (La), % | 0.030 to 0.2 | |
| 0 |
| Lead (Pb), % | 0 | |
| 0 to 0.050 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0.010 to 0.5 |
| Molybdenum (Mo), % | 5.0 to 7.0 | |
| 0 |
| Nickel (Ni), % | 0 to 1.0 | |
| 0.2 to 0.8 |
| Nitrogen (N), % | 0 to 0.25 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0.040 to 0.15 |
| Tin (Sn), % | 0 | |
| 0.75 to 1.1 |
| Zinc (Zn), % | 0 | |
| 35.6 to 42.8 |
| Residuals, % | 0 | |
| 0 to 0.5 |