R31539 Cobalt vs. Grade 200 Maraging Steel
R31539 cobalt belongs to the cobalt alloys classification, while grade 200 maraging steel belongs to the iron alloys. There are 23 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is R31539 cobalt and the bottom bar is grade 200 maraging steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 220 | |
| 190 |
| Elongation at Break, % | 13 to 22 | |
| 9.1 to 18 |
| Poisson's Ratio | 0.29 | |
| 0.3 |
| Rockwell C Hardness | 25 to 35 | |
| 29 to 45 |
| Shear Modulus, GPa | 86 | |
| 74 |
| Tensile Strength: Ultimate (UTS), MPa | 1000 to 1340 | |
| 970 to 1500 |
| Tensile Strength: Yield (Proof), MPa | 590 to 940 | |
| 690 to 1490 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 260 |
| Melting Completion (Liquidus), °C | 1360 | |
| 1460 |
| Melting Onset (Solidus), °C | 1290 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 460 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.4 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 8.2 | |
| 4.5 |
| Embodied Energy, MJ/kg | 110 | |
| 59 |
| Embodied Water, L/kg | 530 | |
| 140 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 190 | |
| 140 to 160 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 780 to 2000 | |
| 1240 to 5740 |
| Stiffness to Weight: Axial, points | 15 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 23 |
| Strength to Weight: Axial, points | 33 to 44 | |
| 33 to 51 |
| Strength to Weight: Bending, points | 27 to 32 | |
| 27 to 35 |
| Thermal Shock Resistance, points | 24 to 32 | |
| 29 to 45 |
Alloy Composition
| Aluminum (Al), % | 0.3 to 1.0 | |
| 0.050 to 0.15 |
| Boron (B), % | 0 | |
| 0 to 0.0030 |
| Calcium (Ca), % | 0 | |
| 0 to 0.050 |
| Carbon (C), % | 0 to 0.14 | |
| 0 to 0.030 |
| Chromium (Cr), % | 26 to 30 | |
| 0 |
| Cobalt (Co), % | 57.7 to 68.7 | |
| 8.0 to 9.0 |
| Iron (Fe), % | 0 to 0.75 | |
| 67.8 to 71.8 |
| Lanthanum (La), % | 0.030 to 0.2 | |
| 0 |
| Manganese (Mn), % | 0 to 1.0 | |
| 0 to 0.1 |
| Molybdenum (Mo), % | 5.0 to 7.0 | |
| 3.0 to 3.5 |
| Nickel (Ni), % | 0 to 1.0 | |
| 17 to 19 |
| Nitrogen (N), % | 0 to 0.25 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 1.0 | |
| 0 to 0.1 |
| Sulfur (S), % | 0 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 0.15 to 0.25 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.020 |