Nickel 718 vs. S45500 Stainless Steel
Nickel 718 belongs to the nickel alloys classification, while S45500 stainless steel belongs to the iron alloys. They have 40% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is nickel 718 and the bottom bar is S45500 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 190 |
| Elongation at Break, % | 12 to 50 | |
| 3.4 to 11 |
| Fatigue Strength, MPa | 460 to 760 | |
| 570 to 890 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Reduction in Area, % | 34 to 64 | |
| 34 to 45 |
| Rockwell C Hardness | 40 | |
| 32 to 54 |
| Shear Modulus, GPa | 75 | |
| 75 |
| Shear Strength, MPa | 660 to 950 | |
| 790 to 1090 |
| Tensile Strength: Ultimate (UTS), MPa | 930 to 1530 | |
| 1370 to 1850 |
| Tensile Strength: Yield (Proof), MPa | 510 to 1330 | |
| 1240 to 1700 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 980 | |
| 760 |
| Melting Completion (Liquidus), °C | 1340 | |
| 1440 |
| Melting Onset (Solidus), °C | 1260 | |
| 1400 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 75 | |
| 17 |
| Density, g/cm3 | 8.3 | |
| 7.9 |
| Embodied Carbon, kg CO2/kg material | 13 | |
| 3.8 |
| Embodied Energy, MJ/kg | 190 | |
| 57 |
| Embodied Water, L/kg | 250 | |
| 120 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 390 | |
| 45 to 190 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 |
| Strength to Weight: Axial, points | 31 to 51 | |
| 48 to 65 |
| Strength to Weight: Bending, points | 25 to 35 | |
| 35 to 42 |
| Thermal Shock Resistance, points | 27 to 44 | |
| 48 to 64 |
Alloy Composition
| Aluminum (Al), % | 0.2 to 0.8 | |
| 0 |
| Boron (B), % | 0 to 0.0060 | |
| 0 |
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.050 |
| Chromium (Cr), % | 17 to 21 | |
| 11 to 12.5 |
| Cobalt (Co), % | 0 to 1.0 | |
| 0 |
| Copper (Cu), % | 0 to 0.3 | |
| 1.5 to 2.5 |
| Iron (Fe), % | 11.1 to 24.6 | |
| 71.5 to 79.2 |
| Manganese (Mn), % | 0 to 0.35 | |
| 0 to 0.5 |
| Molybdenum (Mo), % | 2.8 to 3.3 | |
| 0 to 0.5 |
| Nickel (Ni), % | 50 to 55 | |
| 7.5 to 9.5 |
| Niobium (Nb), % | 4.8 to 5.5 | |
| 0 to 0.5 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.040 |
| Silicon (Si), % | 0 to 0.35 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.030 |
| Tantalum (Ta), % | 0 | |
| 0 to 0.5 |
| Titanium (Ti), % | 0.65 to 1.2 | |
| 0.8 to 1.4 |