Nickel 725 vs. SAE-AISI A8 Steel
Nickel 725 belongs to the nickel alloys classification, while SAE-AISI A8 steel belongs to the iron alloys. There are 21 material properties with values for both materials. Properties with values for just one material (11, in this case) are not shown.
For each property being compared, the top bar is nickel 725 and the bottom bar is SAE-AISI A8 steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 200 | |
| 190 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Shear Modulus, GPa | 78 | |
| 74 |
| Tensile Strength: Ultimate (UTS), MPa | 860 | |
| 700 to 1920 |
Thermal Properties
| Latent Heat of Fusion, J/g | 320 | |
| 270 |
| Melting Completion (Liquidus), °C | 1340 | |
| 1480 |
| Melting Onset (Solidus), °C | 1270 | |
| 1430 |
| Specific Heat Capacity, J/kg-K | 440 | |
| 470 |
| Thermal Expansion, µm/m-K | 13 | |
| 12 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.5 | |
| 8.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.6 | |
| 9.5 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 75 | |
| 8.5 |
| Density, g/cm3 | 8.5 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 13 | |
| 2.3 |
| Embodied Energy, MJ/kg | 190 | |
| 31 |
| Embodied Water, L/kg | 270 | |
| 73 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 28 | |
| 25 to 68 |
| Strength to Weight: Bending, points | 24 | |
| 22 to 44 |
| Thermal Shock Resistance, points | 23 | |
| 22 to 62 |
Alloy Composition
| Aluminum (Al), % | 0 to 0.35 | |
| 0 |
| Carbon (C), % | 0 to 0.030 | |
| 0.5 to 0.6 |
| Chromium (Cr), % | 19 to 22.5 | |
| 4.8 to 5.5 |
| Copper (Cu), % | 0 | |
| 0 to 0.25 |
| Iron (Fe), % | 2.3 to 15.3 | |
| 88.5 to 91.9 |
| Manganese (Mn), % | 0 to 0.35 | |
| 0 to 0.5 |
| Molybdenum (Mo), % | 7.0 to 9.5 | |
| 1.2 to 1.7 |
| Nickel (Ni), % | 55 to 59 | |
| 0 to 0.3 |
| Niobium (Nb), % | 2.8 to 4.0 | |
| 0 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.030 |
| Silicon (Si), % | 0 to 0.2 | |
| 0.75 to 1.1 |
| Sulfur (S), % | 0 to 0.010 | |
| 0 to 0.030 |
| Titanium (Ti), % | 1.0 to 1.7 | |
| 0 |
| Tungsten (W), % | 0 | |
| 1.0 to 1.5 |