R30008 Cobalt vs. R30605 Cobalt
Both R30008 cobalt and R30605 cobalt are cobalt alloys. They have 74% of their average alloy composition in common. There are 21 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 R30605 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 210 |
| Elongation at Break, % | 1.1 to 73 | |
| 34 |
| Fatigue Strength, MPa | 320 to 530 | |
| 260 to 590 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 83 | |
| 81 |
| Tensile Strength: Ultimate (UTS), MPa | 950 to 1700 | |
| 1130 to 1900 |
| Tensile Strength: Yield (Proof), MPa | 500 to 1080 | |
| 470 to 1600 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 290 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1410 |
| Melting Onset (Solidus), °C | 1330 | |
| 1330 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 410 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 9.6 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 9.8 |
| Embodied Energy, MJ/kg | 110 | |
| 140 |
| Embodied Water, L/kg | 400 | |
| 450 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 12 |
| Stiffness to Weight: Bending, points | 24 | |
| 21 |
| Strength to Weight: Axial, points | 31 to 56 | |
| 33 to 55 |
| Strength to Weight: Bending, points | 25 to 37 | |
| 25 to 36 |
| Thermal Shock Resistance, points | 25 to 44 | |
| 31 to 52 |
Alloy Composition
| Boron (B), % | 0 to 0.0010 | |
| 0 |
| Carbon (C), % | 0 to 0.15 | |
| 0.050 to 0.15 |
| Chromium (Cr), % | 18.5 to 21.5 | |
| 19 to 21 |
| Cobalt (Co), % | 39 to 42 | |
| 46.4 to 57 |
| Iron (Fe), % | 7.6 to 20 | |
| 0 to 3.0 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 6.5 to 7.5 | |
| 0 |
| Nickel (Ni), % | 15 to 18 | |
| 9.0 to 11 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 1.2 | |
| 0 to 0.4 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |
| Tungsten (W), % | 0 | |
| 14 to 16 |