SAE-AISI P20 Steel vs. Nickel 718
SAE-AISI P20 steel belongs to the iron alloys classification, while nickel 718 belongs to the nickel alloys. They have a modest 20% 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 (12, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI P20 steel and the bottom bar is nickel 718.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 73 | |
| 75 |
| Tensile Strength: Ultimate (UTS), MPa | 540 to 1050 | |
| 930 to 1530 |
Thermal Properties
| Latent Heat of Fusion, J/g | 260 | |
| 310 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1340 |
| Melting Onset (Solidus), °C | 1420 | |
| 1260 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 450 |
| Thermal Conductivity, W/m-K | 45 | |
| 11 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.4 | |
| 1.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.5 | |
| 1.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.8 | |
| 75 |
| Density, g/cm3 | 7.8 | |
| 8.3 |
| Embodied Carbon, kg CO2/kg material | 1.6 | |
| 13 |
| Embodied Energy, MJ/kg | 21 | |
| 190 |
| Embodied Water, L/kg | 52 | |
| 250 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 23 |
| Strength to Weight: Axial, points | 19 to 37 | |
| 31 to 51 |
| Strength to Weight: Bending, points | 19 to 29 | |
| 25 to 35 |
| Thermal Diffusivity, mm2/s | 12 | |
| 3.0 |
| Thermal Shock Resistance, points | 18 to 35 | |
| 27 to 44 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0.2 to 0.8 |
| Boron (B), % | 0 | |
| 0 to 0.0060 |
| Carbon (C), % | 0.28 to 0.4 | |
| 0 to 0.080 |
| Chromium (Cr), % | 0.4 to 2.0 | |
| 17 to 21 |
| Cobalt (Co), % | 0 | |
| 0 to 1.0 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 to 0.3 |
| Iron (Fe), % | 95.2 to 98.5 | |
| 11.1 to 24.6 |
| Manganese (Mn), % | 0.35 to 0.71 | |
| 0 to 0.35 |
| Molybdenum (Mo), % | 0.3 to 0.55 | |
| 2.8 to 3.3 |
| Nickel (Ni), % | 0 | |
| 50 to 55 |
| Niobium (Nb), % | 0 | |
| 4.8 to 5.5 |
| Phosphorus (P), % | 0 to 0.030 | |
| 0 to 0.015 |
| Silicon (Si), % | 0.2 to 0.8 | |
| 0 to 0.35 |
| Sulfur (S), % | 0 to 0.030 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0 | |
| 0.65 to 1.2 |