R30075 Cobalt vs. C28000 Muntz Metal
R30075 cobalt belongs to the cobalt alloys classification, while C28000 Muntz Metal belongs to the copper alloys. There are 26 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is R30075 cobalt and the bottom bar is C28000 Muntz Metal.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 to 250 | |
| 100 |
| Elongation at Break, % | 12 | |
| 10 to 45 |
| Poisson's Ratio | 0.29 | |
| 0.31 |
| Shear Modulus, GPa | 82 to 98 | |
| 40 |
| Tensile Strength: Ultimate (UTS), MPa | 780 to 1280 | |
| 330 to 610 |
| Tensile Strength: Yield (Proof), MPa | 480 to 840 | |
| 150 to 370 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 170 |
| Melting Completion (Liquidus), °C | 1360 | |
| 900 |
| Melting Onset (Solidus), °C | 1290 | |
| 900 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 390 |
| Thermal Conductivity, W/m-K | 13 | |
| 120 |
| Thermal Expansion, µm/m-K | 12 | |
| 21 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 2.0 | |
| 28 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.1 | |
| 31 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 8.0 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 2.7 |
| Embodied Energy, MJ/kg | 110 | |
| 46 |
| Embodied Water, L/kg | 530 | |
| 320 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 84 to 140 | |
| 27 to 240 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 560 to 1410 | |
| 110 to 670 |
| Stiffness to Weight: Axial, points | 14 to 17 | |
| 7.2 |
| Stiffness to Weight: Bending, points | 24 to 25 | |
| 20 |
| Strength to Weight: Axial, points | 26 to 42 | |
| 11 to 21 |
| Strength to Weight: Bending, points | 22 to 31 | |
| 13 to 20 |
| Thermal Diffusivity, mm2/s | 3.5 | |
| 40 |
| Thermal Shock Resistance, points | 21 to 29 | |
| 11 to 20 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.1 | |
| 0 |
| Boron (B), % | 0 to 0.010 | |
| 0 |
| Carbon (C), % | 0 to 0.35 | |
| 0 |
| Chromium (Cr), % | 27 to 30 | |
| 0 |
| Cobalt (Co), % | 58.7 to 68 | |
| 0 |
| Copper (Cu), % | 0 | |
| 59 to 63 |
| Iron (Fe), % | 0 to 0.75 | |
| 0 to 0.070 |
| Lead (Pb), % | 0 | |
| 0 to 0.3 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 |
| Molybdenum (Mo), % | 5.0 to 7.0 | |
| 0 |
| Nickel (Ni), % | 0 to 0.5 | |
| 0 |
| Nitrogen (N), % | 0 to 0.25 | |
| 0 |
| Phosphorus (P), % | 0 to 0.020 | |
| 0 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 |
| Titanium (Ti), % | 0 to 0.1 | |
| 0 |
| Tungsten (W), % | 0 to 0.2 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 36.3 to 41 |
| Residuals, % | 0 | |
| 0 to 0.3 |