R30008 Cobalt vs. C68800 Brass
R30008 cobalt belongs to the cobalt alloys classification, while C68800 brass belongs to the copper alloys. There are 22 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 R30008 cobalt and the bottom bar is C68800 brass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 110 |
| Elongation at Break, % | 1.1 to 73 | |
| 2.0 to 36 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Shear Modulus, GPa | 83 | |
| 41 |
| Tensile Strength: Ultimate (UTS), MPa | 950 to 1700 | |
| 570 to 890 |
| Tensile Strength: Yield (Proof), MPa | 500 to 1080 | |
| 390 to 790 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 190 |
| Melting Completion (Liquidus), °C | 1400 | |
| 960 |
| Melting Onset (Solidus), °C | 1330 | |
| 950 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 400 |
| Thermal Expansion, µm/m-K | 13 | |
| 19 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 95 | |
| 26 |
| Density, g/cm3 | 8.4 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 2.8 |
| Embodied Energy, MJ/kg | 110 | |
| 48 |
| Embodied Water, L/kg | 400 | |
| 350 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 590 to 2720 | |
| 710 to 2860 |
| Stiffness to Weight: Axial, points | 14 | |
| 7.3 |
| Stiffness to Weight: Bending, points | 24 | |
| 19 |
| Strength to Weight: Axial, points | 31 to 56 | |
| 19 to 30 |
| Strength to Weight: Bending, points | 25 to 37 | |
| 19 to 25 |
| Thermal Shock Resistance, points | 25 to 44 | |
| 19 to 30 |
Alloy Composition
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| Aluminum (Al), % | 0 | |
| 3.0 to 3.8 |
| Boron (B), % | 0 to 0.0010 | |
| 0 |
| Carbon (C), % | 0 to 0.15 | |
| 0 |
| Chromium (Cr), % | 18.5 to 21.5 | |
| 0 |
| Cobalt (Co), % | 39 to 42 | |
| 0.25 to 0.55 |
| Copper (Cu), % | 0 | |
| 70.8 to 75.5 |
| Iron (Fe), % | 7.6 to 20 | |
| 0 to 0.2 |
| Lead (Pb), % | 0 | |
| 0 to 0.050 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 |
| Molybdenum (Mo), % | 6.5 to 7.5 | |
| 0 |
| Nickel (Ni), % | 15 to 18 | |
| 0 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 |
| Silicon (Si), % | 0 to 1.2 | |
| 0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 21.3 to 24.1 |
| Residuals, % | 0 | |
| 0 to 0.5 |