R30816 Cobalt vs. C21000 Brass
R30816 cobalt belongs to the cobalt alloys classification, while C21000 brass belongs to the copper 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 R30816 cobalt and the bottom bar is C21000 brass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 110 |
| Elongation at Break, % | 23 | |
| 2.9 to 50 |
| Poisson's Ratio | 0.3 | |
| 0.34 |
| Shear Modulus, GPa | 81 | |
| 43 |
| Tensile Strength: Ultimate (UTS), MPa | 1020 | |
| 240 to 450 |
| Tensile Strength: Yield (Proof), MPa | 460 | |
| 69 to 440 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 200 |
| Melting Completion (Liquidus), °C | 1540 | |
| 1070 |
| Melting Onset (Solidus), °C | 1460 | |
| 1050 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 390 |
| Thermal Conductivity, W/m-K | 13 | |
| 230 |
| Thermal Expansion, µm/m-K | 12 | |
| 18 |
Otherwise Unclassified Properties
| Density, g/cm3 | 9.1 | |
| 8.8 |
| Embodied Carbon, kg CO2/kg material | 20 | |
| 2.6 |
| Embodied Energy, MJ/kg | 320 | |
| 42 |
| Embodied Water, L/kg | 440 | |
| 310 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 190 | |
| 13 to 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 510 | |
| 21 to 830 |
| Stiffness to Weight: Axial, points | 13 | |
| 7.2 |
| Stiffness to Weight: Bending, points | 22 | |
| 18 |
| Strength to Weight: Axial, points | 31 | |
| 7.4 to 14 |
| Strength to Weight: Bending, points | 25 | |
| 9.6 to 15 |
| Thermal Diffusivity, mm2/s | 3.3 | |
| 69 |
| Thermal Shock Resistance, points | 28 | |
| 8.1 to 15 |
Alloy Composition
| Carbon (C), % | 0.32 to 0.42 | |
| 0 |
| Chromium (Cr), % | 19 to 21 | |
| 0 |
| Cobalt (Co), % | 40 to 49.8 | |
| 0 |
| Copper (Cu), % | 0 | |
| 94 to 96 |
| Iron (Fe), % | 0 to 5.0 | |
| 0 to 0.050 |
| Lead (Pb), % | 0 | |
| 0 to 0.030 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 |
| Molybdenum (Mo), % | 3.5 to 4.5 | |
| 0 |
| Nickel (Ni), % | 19 to 21 | |
| 0 |
| Niobium (Nb), % | 3.5 to 4.5 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 |
| Tantalum (Ta), % | 3.5 to 4.5 | |
| 0 |
| Tungsten (W), % | 3.5 to 4.5 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 3.7 to 6.0 |
| Residuals, % | 0 | |
| 0 to 0.2 |