R30035 Cobalt vs. Grade 300 Maraging Steel
R30035 cobalt belongs to the cobalt alloys classification, while grade 300 maraging steel belongs to the iron alloys. They have a modest 34% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.
For each property being compared, the top bar is R30035 cobalt and the bottom bar is grade 300 maraging steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 to 230 | |
| 190 |
| Elongation at Break, % | 9.0 to 46 | |
| 6.5 to 18 |
| Poisson's Ratio | 0.29 | |
| 0.3 |
| Shear Modulus, GPa | 84 to 89 | |
| 75 |
| Tensile Strength: Ultimate (UTS), MPa | 900 to 1900 | |
| 1030 to 2030 |
| Tensile Strength: Yield (Proof), MPa | 300 to 1650 | |
| 760 to 1990 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 270 |
| Melting Completion (Liquidus), °C | 1440 | |
| 1480 |
| Melting Onset (Solidus), °C | 1320 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 450 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 100 | |
| 34 |
| Density, g/cm3 | 8.7 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 5.1 |
| Embodied Energy, MJ/kg | 140 | |
| 68 |
| Embodied Water, L/kg | 410 | |
| 150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 160 to 320 | |
| 130 to 170 |
| Stiffness to Weight: Axial, points | 14 to 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 to 24 | |
| 23 |
| Strength to Weight: Axial, points | 29 to 61 | |
| 35 to 68 |
| Strength to Weight: Bending, points | 24 to 39 | |
| 28 to 43 |
| Thermal Shock Resistance, points | 23 to 46 | |
| 31 to 62 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0.050 to 0.15 |
| Boron (B), % | 0 to 0.015 | |
| 0 to 0.0030 |
| Calcium (Ca), % | 0 | |
| 0 to 0.050 |
| Carbon (C), % | 0 to 0.025 | |
| 0 to 0.030 |
| Chromium (Cr), % | 19 to 21 | |
| 0 |
| Cobalt (Co), % | 29.1 to 39 | |
| 8.5 to 9.5 |
| Iron (Fe), % | 0 to 1.0 | |
| 65 to 68.4 |
| Manganese (Mn), % | 0 to 0.15 | |
| 0 to 0.1 |
| Molybdenum (Mo), % | 9.0 to 10.5 | |
| 4.6 to 5.2 |
| Nickel (Ni), % | 33 to 37 | |
| 18 to 19 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 0.15 | |
| 0 to 0.1 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 to 1.0 | |
| 0.5 to 0.8 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.020 |