Grade 350 Maraging Steel vs. R31539 Cobalt
Grade 350 maraging steel belongs to the iron alloys classification, while R31539 cobalt belongs to the cobalt alloys. 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 grade 350 maraging steel and the bottom bar is R31539 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 220 |
| Elongation at Break, % | 4.1 to 18 | |
| 13 to 22 |
| Poisson's Ratio | 0.3 | |
| 0.29 |
| Rockwell C Hardness | 34 to 60 | |
| 25 to 35 |
| Shear Modulus, GPa | 75 | |
| 86 |
| Tensile Strength: Ultimate (UTS), MPa | 1140 to 2420 | |
| 1000 to 1340 |
| Tensile Strength: Yield (Proof), MPa | 830 to 2300 | |
| 590 to 940 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 320 |
| Melting Completion (Liquidus), °C | 1470 | |
| 1360 |
| Melting Onset (Solidus), °C | 1420 | |
| 1290 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 450 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.2 | |
| 8.4 |
| Embodied Carbon, kg CO2/kg material | 5.6 | |
| 8.2 |
| Embodied Energy, MJ/kg | 74 | |
| 110 |
| Embodied Water, L/kg | 160 | |
| 530 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 98 to 190 | |
| 140 to 190 |
| Stiffness to Weight: Axial, points | 13 | |
| 15 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 38 to 82 | |
| 33 to 44 |
| Strength to Weight: Bending, points | 29 to 49 | |
| 27 to 32 |
| Thermal Shock Resistance, points | 35 to 74 | |
| 24 to 32 |
Alloy Composition
| Aluminum (Al), % | 0.050 to 0.15 | |
| 0.3 to 1.0 |
| Boron (B), % | 0 to 0.0030 | |
| 0 |
| Calcium (Ca), % | 0 to 0.050 | |
| 0 |
| Carbon (C), % | 0 to 0.030 | |
| 0 to 0.14 |
| Chromium (Cr), % | 0 | |
| 26 to 30 |
| Cobalt (Co), % | 11.5 to 12.5 | |
| 57.7 to 68.7 |
| Iron (Fe), % | 61.2 to 64.6 | |
| 0 to 0.75 |
| Lanthanum (La), % | 0 | |
| 0.030 to 0.2 |
| Manganese (Mn), % | 0 to 0.1 | |
| 0 to 1.0 |
| Molybdenum (Mo), % | 4.6 to 5.2 | |
| 5.0 to 7.0 |
| Nickel (Ni), % | 18 to 19 | |
| 0 to 1.0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.25 |
| Phosphorus (P), % | 0 to 0.010 | |
| 0 |
| Silicon (Si), % | 0 to 0.1 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 |
| Titanium (Ti), % | 1.3 to 1.6 | |
| 0 |
| Zirconium (Zr), % | 0 to 0.020 | |
| 0 |