SAE-AISI H25 Steel vs. Nickel 718
SAE-AISI H25 steel belongs to the iron alloys classification, while nickel 718 belongs to the nickel alloys. They have a modest 23% of their average alloy composition in common, which, by itself, doesn't mean much. There are 21 material properties with values for both materials. Properties with values for just one material (14, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI H25 steel and the bottom bar is nickel 718.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 79 | |
| 75 |
| Tensile Strength: Ultimate (UTS), MPa | 710 to 1620 | |
| 930 to 1530 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 310 |
| Melting Completion (Liquidus), °C | 1750 | |
| 1340 |
| Melting Onset (Solidus), °C | 1700 | |
| 1260 |
| Specific Heat Capacity, J/kg-K | 420 | |
| 450 |
| Thermal Conductivity, W/m-K | 26 | |
| 11 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 38 | |
| 75 |
| Density, g/cm3 | 9.1 | |
| 8.3 |
| Embodied Carbon, kg CO2/kg material | 6.2 | |
| 13 |
| Embodied Energy, MJ/kg | 93 | |
| 190 |
| Embodied Water, L/kg | 83 | |
| 250 |
Common Calculations
| Stiffness to Weight: Axial, points | 12 | |
| 13 |
| Stiffness to Weight: Bending, points | 22 | |
| 23 |
| Strength to Weight: Axial, points | 22 to 50 | |
| 31 to 51 |
| Strength to Weight: Bending, points | 20 to 34 | |
| 25 to 35 |
| Thermal Diffusivity, mm2/s | 6.7 | |
| 3.0 |
| Thermal Shock Resistance, points | 22 to 49 | |
| 27 to 44 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0.2 to 0.8 |
| Boron (B), % | 0 | |
| 0 to 0.0060 |
| Carbon (C), % | 0.22 to 0.32 | |
| 0 to 0.080 |
| Chromium (Cr), % | 3.8 to 4.5 | |
| 17 to 21 |
| Cobalt (Co), % | 0 | |
| 0 to 1.0 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 to 0.3 |
| Iron (Fe), % | 77.2 to 81.3 | |
| 11.1 to 24.6 |
| Manganese (Mn), % | 0.15 to 0.4 | |
| 0 to 0.35 |
| Molybdenum (Mo), % | 0 | |
| 2.8 to 3.3 |
| Nickel (Ni), % | 0 to 0.3 | |
| 50 to 55 |
| Niobium (Nb), % | 0 | |
| 4.8 to 5.5 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.015 |
| Silicon (Si), % | 0.15 to 0.4 | |
| 0 to 0.35 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0 | |
| 0.65 to 1.2 |
| Tungsten (W), % | 14 to 16 | |
| 0 |
| Vanadium (V), % | 0.4 to 0.6 | |
| 0 |