SAE-AISI 1018 Steel vs. Nickel 725
SAE-AISI 1018 steel belongs to the iron alloys classification, while nickel 725 belongs to the nickel alloys. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 1018 steel and the bottom bar is nickel 725.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 17 to 27 | |
| 34 |
| Fatigue Strength, MPa | 180 to 270 | |
| 260 |
| Poisson's Ratio | 0.29 | |
| 0.29 |
| Reduction in Area, % | 45 to 57 | |
| 45 |
| Shear Modulus, GPa | 73 | |
| 78 |
| Shear Strength, MPa | 280 to 300 | |
| 580 |
| Tensile Strength: Ultimate (UTS), MPa | 430 to 480 | |
| 860 |
| Tensile Strength: Yield (Proof), MPa | 240 to 400 | |
| 350 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 320 |
| Maximum Temperature: Mechanical, °C | 400 | |
| 980 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1340 |
| Melting Onset (Solidus), °C | 1420 | |
| 1270 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 440 |
| Thermal Expansion, µm/m-K | 12 | |
| 13 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 7.0 | |
| 1.5 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 8.0 | |
| 1.6 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 1.8 | |
| 75 |
| Density, g/cm3 | 7.9 | |
| 8.5 |
| Embodied Carbon, kg CO2/kg material | 1.4 | |
| 13 |
| Embodied Energy, MJ/kg | 18 | |
| 190 |
| Embodied Water, L/kg | 46 | |
| 270 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 75 to 100 | |
| 240 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 150 to 430 | |
| 300 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 24 | |
| 23 |
| Strength to Weight: Axial, points | 15 to 17 | |
| 28 |
| Strength to Weight: Bending, points | 16 to 17 | |
| 24 |
| Thermal Shock Resistance, points | 14 to 15 | |
| 23 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.35 |
| Carbon (C), % | 0.15 to 0.2 | |
| 0 to 0.030 |
| Chromium (Cr), % | 0 | |
| 19 to 22.5 |
| Iron (Fe), % | 98.8 to 99.25 | |
| 2.3 to 15.3 |
| Manganese (Mn), % | 0.6 to 0.9 | |
| 0 to 0.35 |
| Molybdenum (Mo), % | 0 | |
| 7.0 to 9.5 |
| Nickel (Ni), % | 0 | |
| 55 to 59 |
| Niobium (Nb), % | 0 | |
| 2.8 to 4.0 |
| Phosphorus (P), % | 0 to 0.040 | |
| 0 to 0.015 |
| Silicon (Si), % | 0 | |
| 0 to 0.2 |
| Sulfur (S), % | 0 to 0.050 | |
| 0 to 0.010 |
| Titanium (Ti), % | 0 | |
| 1.0 to 1.7 |