R30155 Cobalt vs. C91700 Bronze
R30155 cobalt belongs to the iron alloys classification, while C91700 bronze belongs to the copper alloys. There are 27 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.
For each property being compared, the top bar is R30155 cobalt and the bottom bar is C91700 bronze.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 220 | |
| 90 |
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 110 |
| Elongation at Break, % | 34 | |
| 13 |
| Poisson's Ratio | 0.29 | |
| 0.34 |
| Shear Modulus, GPa | 81 | |
| 41 |
| Tensile Strength: Ultimate (UTS), MPa | 850 | |
| 330 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 300 | |
| 190 |
| Maximum Temperature: Mechanical, °C | 1100 | |
| 170 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1020 |
| Melting Onset (Solidus), °C | 1420 | |
| 850 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 370 |
| Thermal Conductivity, W/m-K | 12 | |
| 71 |
| Thermal Expansion, µm/m-K | 14 | |
| 18 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 80 | |
| 36 |
| Density, g/cm3 | 8.5 | |
| 8.7 |
| Embodied Carbon, kg CO2/kg material | 9.7 | |
| 3.9 |
| Embodied Energy, MJ/kg | 150 | |
| 63 |
| Embodied Water, L/kg | 300 | |
| 400 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 230 | |
| 35 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 370 | |
| 140 |
| Stiffness to Weight: Axial, points | 14 | |
| 6.9 |
| Stiffness to Weight: Bending, points | 23 | |
| 18 |
| Strength to Weight: Axial, points | 28 | |
| 11 |
| Strength to Weight: Bending, points | 24 | |
| 12 |
| Thermal Diffusivity, mm2/s | 3.2 | |
| 22 |
| Thermal Shock Resistance, points | 21 | |
| 12 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.0050 |
| Antimony (Sb), % | 0 | |
| 0 to 0.2 |
| Carbon (C), % | 0.080 to 0.16 | |
| 0 |
| Chromium (Cr), % | 20 to 22.5 | |
| 0 |
| Cobalt (Co), % | 18.5 to 21 | |
| 0 |
| Copper (Cu), % | 0 | |
| 84.2 to 87.5 |
| Iron (Fe), % | 24.3 to 36.2 | |
| 0 to 0.2 |
| Lead (Pb), % | 0 | |
| 0 to 0.25 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 |
| Molybdenum (Mo), % | 2.5 to 3.5 | |
| 0 |
| Nickel (Ni), % | 19 to 21 | |
| 1.2 to 2.0 |
| Niobium (Nb), % | 0.75 to 1.3 | |
| 0 |
| Nitrogen (N), % | 0 to 0.2 | |
| 0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.3 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.0050 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.050 |
| Tantalum (Ta), % | 0.75 to 1.3 | |
| 0 |
| Tin (Sn), % | 0 | |
| 11.3 to 12.5 |
| Tungsten (W), % | 2.0 to 3.0 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0 to 0.25 |