Grade 300 Maraging Steel vs. R30021 Cobalt
Grade 300 maraging steel belongs to the iron alloys classification, while R30021 cobalt belongs to the cobalt alloys. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is grade 300 maraging steel and the bottom bar is R30021 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Compressive (Crushing) Strength, MPa | 730 to 1880 | |
| 1300 |
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 220 |
| Elongation at Break, % | 6.5 to 18 | |
| 9.0 |
| Poisson's Ratio | 0.3 | |
| 0.29 |
| Rockwell C Hardness | 31 to 56 | |
| 32 |
| Shear Modulus, GPa | 75 | |
| 86 |
| Tensile Strength: Ultimate (UTS), MPa | 1030 to 2030 | |
| 700 |
| Tensile Strength: Yield (Proof), MPa | 760 to 1990 | |
| 500 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 330 |
| Melting Completion (Liquidus), °C | 1480 | |
| 1350 |
| Melting Onset (Solidus), °C | 1430 | |
| 1190 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 450 |
| Thermal Expansion, µm/m-K | 12 | |
| 11 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.2 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 5.1 | |
| 8.0 |
| Embodied Energy, MJ/kg | 68 | |
| 110 |
| Embodied Water, L/kg | 150 | |
| 520 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 to 170 | |
| 57 |
| Stiffness to Weight: Axial, points | 13 | |
| 15 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 35 to 68 | |
| 23 |
| Strength to Weight: Bending, points | 28 to 43 | |
| 21 |
| Thermal Shock Resistance, points | 31 to 62 | |
| 21 |
Alloy Composition
| Aluminum (Al), % | 0.050 to 0.15 | |
| 0 |
| Boron (B), % | 0 to 0.0030 | |
| 0 |
| Calcium (Ca), % | 0 to 0.050 | |
| 0 |
| Carbon (C), % | 0 to 0.030 | |
| 0.2 to 0.35 |
| Chromium (Cr), % | 0 | |
| 26 to 29 |
| Cobalt (Co), % | 8.5 to 9.5 | |
| 61.7 to 67.3 |
| Iron (Fe), % | 65 to 68.4 | |
| 0 to 3.0 |
| Manganese (Mn), % | 0 to 0.1 | |
| 0 |
| Molybdenum (Mo), % | 4.6 to 5.2 | |
| 4.5 to 6.0 |
| Nickel (Ni), % | 18 to 19 | |
| 2.0 to 3.0 |
| Phosphorus (P), % | 0 to 0.010 | |
| 0 |
| Silicon (Si), % | 0 to 0.1 | |
| 0 to 1.5 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 |
| Titanium (Ti), % | 0.5 to 0.8 | |
| 0 |
| Zirconium (Zr), % | 0 to 0.020 | |
| 0 |