Nickel 684 vs. Grade 250 Maraging Steel
Nickel 684 belongs to the nickel alloys classification, while grade 250 maraging steel belongs to the iron alloys. They have a modest 32% of their average alloy composition in common, which, by itself, doesn't mean much. There are 23 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.
For each property being compared, the top bar is nickel 684 and the bottom bar is grade 250 maraging steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Elongation at Break, % | 11 | |
| 7.3 to 17 |
| Poisson's Ratio | 0.29 | |
| 0.3 |
| Shear Modulus, GPa | 76 | |
| 75 |
| Shear Strength, MPa | 710 | |
| 600 to 1060 |
| Tensile Strength: Ultimate (UTS), MPa | 1190 | |
| 970 to 1800 |
| Tensile Strength: Yield (Proof), MPa | 800 | |
| 660 to 1740 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 270 |
| Melting Completion (Liquidus), °C | 1370 | |
| 1480 |
| Melting Onset (Solidus), °C | 1320 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 450 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 75 | |
| 32 |
| Density, g/cm3 | 8.3 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 10 | |
| 4.9 |
| Embodied Energy, MJ/kg | 140 | |
| 65 |
| Embodied Water, L/kg | 360 | |
| 140 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 120 | |
| 130 to 150 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 23 |
| Strength to Weight: Axial, points | 40 | |
| 33 to 61 |
| Strength to Weight: Bending, points | 30 | |
| 26 to 40 |
| Thermal Shock Resistance, points | 34 | |
| 29 to 54 |
Alloy Composition
| Aluminum (Al), % | 2.5 to 3.3 | |
| 0.050 to 0.15 |
| Boron (B), % | 0.0030 to 0.010 | |
| 0 to 0.0030 |
| Calcium (Ca), % | 0 | |
| 0 to 0.050 |
| Carbon (C), % | 0 to 0.15 | |
| 0 to 0.030 |
| Chromium (Cr), % | 15 to 20 | |
| 0 |
| Cobalt (Co), % | 13 to 20 | |
| 7.0 to 8.5 |
| Copper (Cu), % | 0 to 0.15 | |
| 0 |
| Iron (Fe), % | 0 to 4.0 | |
| 66.3 to 71.1 |
| Manganese (Mn), % | 0 to 0.75 | |
| 0 to 0.1 |
| Molybdenum (Mo), % | 3.0 to 5.0 | |
| 4.6 to 5.2 |
| Nickel (Ni), % | 42.7 to 64 | |
| 17 to 19 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.010 |
| Silicon (Si), % | 0 to 0.75 | |
| 0 to 0.1 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.010 |
| Titanium (Ti), % | 2.5 to 3.3 | |
| 0.3 to 0.5 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.020 |