Grade 250 Maraging Steel vs. R30155 Cobalt
Both grade 250 maraging steel and R30155 cobalt are iron alloys. They have 59% of their average alloy composition in common. There are 24 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 grade 250 maraging steel and the bottom bar is R30155 cobalt.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 210 |
| Elongation at Break, % | 7.3 to 17 | |
| 34 |
| Poisson's Ratio | 0.3 | |
| 0.29 |
| Shear Modulus, GPa | 75 | |
| 81 |
| Shear Strength, MPa | 600 to 1060 | |
| 570 |
| Tensile Strength: Ultimate (UTS), MPa | 970 to 1800 | |
| 850 |
| Tensile Strength: Yield (Proof), MPa | 660 to 1740 | |
| 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 270 | |
| 300 |
| Melting Completion (Liquidus), °C | 1480 | |
| 1470 |
| Melting Onset (Solidus), °C | 1430 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 450 |
| Thermal Expansion, µm/m-K | 12 | |
| 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 32 | |
| 80 |
| Density, g/cm3 | 8.2 | |
| 8.5 |
| Embodied Carbon, kg CO2/kg material | 4.9 | |
| 9.7 |
| Embodied Energy, MJ/kg | 65 | |
| 150 |
| Embodied Water, L/kg | 140 | |
| 300 |
Common Calculations
| PREN (Pitting Resistance) | 16 | |
| 37 |
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 130 to 150 | |
| 230 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 23 |
| Strength to Weight: Axial, points | 33 to 61 | |
| 28 |
| Strength to Weight: Bending, points | 26 to 40 | |
| 24 |
| Thermal Shock Resistance, points | 29 to 54 | |
| 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 | |
| 0.080 to 0.16 |
| Chromium (Cr), % | 0 | |
| 20 to 22.5 |
| Cobalt (Co), % | 7.0 to 8.5 | |
| 18.5 to 21 |
| Iron (Fe), % | 66.3 to 71.1 | |
| 24.3 to 36.2 |
| Manganese (Mn), % | 0 to 0.1 | |
| 1.0 to 2.0 |
| Molybdenum (Mo), % | 4.6 to 5.2 | |
| 2.5 to 3.5 |
| Nickel (Ni), % | 17 to 19 | |
| 19 to 21 |
| Niobium (Nb), % | 0 | |
| 0.75 to 1.3 |
| Nitrogen (N), % | 0 | |
| 0 to 0.2 |
| Phosphorus (P), % | 0 to 0.010 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.1 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0 | |
| 0.75 to 1.3 |
| Titanium (Ti), % | 0.3 to 0.5 | |
| 0 |
| Tungsten (W), % | 0 | |
| 2.0 to 3.0 |
| Zirconium (Zr), % | 0 to 0.020 | |
| 0 |