SAE-AISI 8740 Steel vs. N08120 Nickel
SAE-AISI 8740 steel belongs to the iron alloys classification, while N08120 nickel belongs to the nickel alloys. They have a modest 34% of their average alloy composition in common, which, by itself, doesn't mean much. There are 28 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.
For each property being compared, the top bar is SAE-AISI 8740 steel and the bottom bar is N08120 nickel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 11 to 23 | |
| 34 |
| Fatigue Strength, MPa | 270 to 350 | |
| 230 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 73 | |
| 79 |
| Shear Strength, MPa | 370 to 400 | |
| 470 |
| Tensile Strength: Ultimate (UTS), MPa | 580 to 670 | |
| 700 |
| Tensile Strength: Yield (Proof), MPa | 380 to 570 | |
| 310 |
Thermal Properties
| Latent Heat of Fusion, J/g | 250 | |
| 310 |
| Maximum Temperature: Mechanical, °C | 410 | |
| 1000 |
| Melting Completion (Liquidus), °C | 1460 | |
| 1420 |
| Melting Onset (Solidus), °C | 1420 | |
| 1370 |
| Specific Heat Capacity, J/kg-K | 470 | |
| 470 |
| Thermal Conductivity, W/m-K | 39 | |
| 11 |
| Thermal Expansion, µm/m-K | 13 | |
| 14 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 2.6 | |
| 45 |
| Density, g/cm3 | 7.8 | |
| 8.2 |
| Embodied Carbon, kg CO2/kg material | 1.5 | |
| 7.2 |
| Embodied Energy, MJ/kg | 20 | |
| 100 |
| Embodied Water, L/kg | 50 | |
| 240 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 71 to 120 | |
| 190 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 390 to 850 | |
| 240 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 24 | |
| 24 |
| Strength to Weight: Axial, points | 20 to 24 | |
| 24 |
| Strength to Weight: Bending, points | 20 to 22 | |
| 21 |
| Thermal Diffusivity, mm2/s | 10 | |
| 3.0 |
| Thermal Shock Resistance, points | 17 to 20 | |
| 17 |
Alloy Composition
| Aluminum (Al), % | 0 | |
| 0 to 0.4 |
| Boron (B), % | 0 | |
| 0 to 0.010 |
| Carbon (C), % | 0.38 to 0.43 | |
| 0.020 to 0.1 |
| Chromium (Cr), % | 0.4 to 0.6 | |
| 23 to 27 |
| Cobalt (Co), % | 0 | |
| 0 to 3.0 |
| Copper (Cu), % | 0 | |
| 0 to 0.5 |
| Iron (Fe), % | 96.5 to 97.7 | |
| 21 to 41.4 |
| Manganese (Mn), % | 0.75 to 1.0 | |
| 0 to 1.5 |
| Molybdenum (Mo), % | 0.2 to 0.3 | |
| 0 to 2.5 |
| Nickel (Ni), % | 0.4 to 0.7 | |
| 35 to 39 |
| Niobium (Nb), % | 0 | |
| 0.4 to 0.9 |
| Nitrogen (N), % | 0 | |
| 0.15 to 0.3 |
| Phosphorus (P), % | 0 to 0.035 | |
| 0 to 0.040 |
| Silicon (Si), % | 0.15 to 0.35 | |
| 0 to 1.0 |
| Sulfur (S), % | 0 to 0.040 | |
| 0 to 0.030 |
| Titanium (Ti), % | 0 | |
| 0 to 0.2 |
| Tungsten (W), % | 0 | |
| 0 to 2.5 |