R30003 Cobalt vs. R30008 Cobalt
Both R30003 cobalt and R30008 cobalt are cobalt alloys. They have a very high 98% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is R30003 cobalt and the bottom bar is R30008 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 210 |
| Elongation at Break, % | 10 to 73 | |
| 1.1 to 73 |
| Fatigue Strength, MPa | 320 to 560 | |
| 320 to 530 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 83 | |
| 83 |
| Tensile Strength: Ultimate (UTS), MPa | 970 to 1720 | |
| 950 to 1700 |
| Tensile Strength: Yield (Proof), MPa | 510 to 1090 | |
| 500 to 1080 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 320 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1400 |
| Melting Onset (Solidus), °C | 1440 | |
| 1330 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 450 |
| Thermal Expansion, µm/m-K | 13 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 95 | |
| 95 |
| Density, g/cm3 | 8.4 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 8.0 | |
| 8.1 |
| Embodied Energy, MJ/kg | 110 | |
| 110 |
| Embodied Water, L/kg | 400 | |
| 400 |
Common Calculations
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 600 to 2790 | |
| 590 to 2720 |
| Stiffness to Weight: Axial, points | 14 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 32 to 57 | |
| 31 to 56 |
| Strength to Weight: Bending, points | 26 to 38 | |
| 25 to 37 |
| Thermal Shock Resistance, points | 26 to 45 | |
| 25 to 44 |
Alloy Composition
| Boron (B), % | 0 to 0.1 | |
| 0 to 0.0010 |
| Carbon (C), % | 0 to 0.15 | |
| 0 to 0.15 |
| Chromium (Cr), % | 19 to 21 | |
| 18.5 to 21.5 |
| Cobalt (Co), % | 39 to 41 | |
| 39 to 42 |
| Iron (Fe), % | 10 to 20.5 | |
| 7.6 to 20 |
| Manganese (Mn), % | 1.5 to 2.5 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 6.0 to 8.0 | |
| 6.5 to 7.5 |
| Nickel (Ni), % | 14 to 16 | |
| 15 to 18 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 to 1.2 | |
| 0 to 1.2 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.015 |