R30008 Cobalt vs. Grade 300 Maraging Steel
R30008 cobalt belongs to the cobalt alloys classification, while grade 300 maraging steel belongs to the iron alloys. They have 44% of their average alloy composition in common. There are 21 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 R30008 cobalt and the bottom bar is grade 300 maraging steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 210 | |
| 190 |
| Elongation at Break, % | 1.1 to 73 | |
| 6.5 to 18 |
| Poisson's Ratio | 0.29 | |
| 0.3 |
| Shear Modulus, GPa | 83 | |
| 75 |
| Tensile Strength: Ultimate (UTS), MPa | 950 to 1700 | |
| 1030 to 2030 |
| Tensile Strength: Yield (Proof), MPa | 500 to 1080 | |
| 760 to 1990 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 270 |
| Melting Completion (Liquidus), °C | 1400 | |
| 1480 |
| Melting Onset (Solidus), °C | 1330 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 450 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 95 | |
| 34 |
| Density, g/cm3 | 8.4 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 5.1 |
| Embodied Energy, MJ/kg | 110 | |
| 68 |
| Embodied Water, L/kg | 400 | |
| 150 |
Common Calculations
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 23 |
| Strength to Weight: Axial, points | 31 to 56 | |
| 35 to 68 |
| Strength to Weight: Bending, points | 25 to 37 | |
| 28 to 43 |
| Thermal Shock Resistance, points | 25 to 44 | |
| 31 to 62 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0.050 to 0.15 |
| Boron (B), % | 0 to 0.0010 | |
| 0 to 0.0030 |
| Calcium (Ca), % | 0 | |
| 0 to 0.050 |
| Carbon (C), % | 0 to 0.15 | |
| 0 to 0.030 |
| Chromium (Cr), % | 18.5 to 21.5 | |
| 0 |
| Cobalt (Co), % | 39 to 42 | |
| 8.5 to 9.5 |
| Iron (Fe), % | 7.6 to 20 | |
| 65 to 68.4 |
| Manganese (Mn), % | 1.0 to 2.0 | |
| 0 to 0.1 |
| Molybdenum (Mo), % | 6.5 to 7.5 | |
| 4.6 to 5.2 |
| Nickel (Ni), % | 15 to 18 | |
| 18 to 19 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 1.2 | |
| 0 to 0.1 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0.5 to 0.8 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.020 |