R30008 Cobalt vs. R30035 Cobalt
Both R30008 cobalt and R30035 cobalt are cobalt alloys. They have 78% of their average alloy composition in common. There are 23 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 R30008 cobalt and the bottom bar is R30035 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 220 to 230 |
| Elongation at Break, % | 1.1 to 73 | |
| 9.0 to 46 |
| Fatigue Strength, MPa | 320 to 530 | |
| 170 to 740 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 83 | |
| 84 to 89 |
| Tensile Strength: Ultimate (UTS), MPa | 950 to 1700 | |
| 900 to 1900 |
| Tensile Strength: Yield (Proof), MPa | 500 to 1080 | |
| 300 to 1650 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 320 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1440 |
| Melting Onset (Solidus), °C | 1330 | |
| 1320 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 440 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 95 | |
| 100 |
| Density, g/cm3 | 8.4 | |
| 8.7 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 10 |
| Embodied Energy, MJ/kg | 110 | |
| 140 |
| Embodied Water, L/kg | 400 | |
| 410 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 590 to 2720 | |
| 210 to 5920 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 to 15 |
| Stiffness to Weight: Bending, points | 24 | |
| 23 to 24 |
| Strength to Weight: Axial, points | 31 to 56 | |
| 29 to 61 |
| Strength to Weight: Bending, points | 25 to 37 | |
| 24 to 39 |
| Thermal Shock Resistance, points | 25 to 44 | |
| 23 to 46 |
Alloy Composition
| Boron (B), % | 0 to 0.0010 | |
| 0 to 0.015 |
| Carbon (C), % | 0 to 0.15 | |
| 0 to 0.025 |
| Chromium (Cr), % | 18.5 to 21.5 | |
| 19 to 21 |
| Cobalt (Co), % | 39 to 42 | |
| 29.1 to 39 |
| Iron (Fe), % | 7.6 to 20 | |
| 0 to 1.0 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 0.15 |
| Molybdenum (Mo), % | 6.5 to 7.5 | |
| 9.0 to 10.5 |
| Nickel (Ni), % | 15 to 18 | |
| 33 to 37 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 to 1.2 | |
| 0 to 0.15 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0 to 1.0 |