Nickel 718 vs. EN 1.4938 Stainless Steel
Nickel 718 belongs to the nickel alloys classification, while EN 1.4938 stainless steel belongs to the iron alloys. They have a modest 34% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is nickel 718 and the bottom bar is EN 1.4938 stainless steel.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 200 |
| Elongation at Break, % | 12 to 50 | |
| 16 to 17 |
| Fatigue Strength, MPa | 460 to 760 | |
| 390 to 520 |
| Poisson's Ratio | 0.29 | |
| 0.28 |
| Shear Modulus, GPa | 75 | |
| 76 |
| Shear Strength, MPa | 660 to 950 | |
| 540 to 630 |
| Tensile Strength: Ultimate (UTS), MPa | 930 to 1530 | |
| 870 to 1030 |
| Tensile Strength: Yield (Proof), MPa | 510 to 1330 | |
| 640 to 870 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 980 | |
| 750 |
| Melting Completion (Liquidus), °C | 1340 | |
| 1460 |
| Melting Onset (Solidus), °C | 1260 | |
| 1420 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 470 |
| Thermal Conductivity, W/m-K | 11 | |
| 30 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.4 | |
| 2.9 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.5 | |
| 3.3 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 75 | |
| 10 |
| Density, g/cm3 | 8.3 | |
| 7.8 |
| Embodied Carbon, kg CO2/kg material | 13 | |
| 3.3 |
| Embodied Energy, MJ/kg | 190 | |
| 47 |
| Embodied Water, L/kg | 250 | |
| 110 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 390 | |
| 140 to 160 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 660 to 4560 | |
| 1050 to 1920 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 25 |
| Strength to Weight: Axial, points | 31 to 51 | |
| 31 to 37 |
| Strength to Weight: Bending, points | 25 to 35 | |
| 26 to 29 |
| Thermal Diffusivity, mm2/s | 3.0 | |
| 8.1 |
| Thermal Shock Resistance, points | 27 to 44 | |
| 30 to 35 |
Alloy Composition
| Aluminum (Al), % | 0.2 to 0.8 | |
| 0 |
| Boron (B), % | 0 to 0.0060 | |
| 0 |
| Carbon (C), % | 0 to 0.080 | |
| 0.080 to 0.15 |
| Chromium (Cr), % | 17 to 21 | |
| 11 to 12.5 |
| Cobalt (Co), % | 0 to 1.0 | |
| 0 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 |
| Iron (Fe), % | 11.1 to 24.6 | |
| 80.5 to 84.8 |
| Manganese (Mn), % | 0 to 0.35 | |
| 0.4 to 0.9 |
| Molybdenum (Mo), % | 2.8 to 3.3 | |
| 1.5 to 2.0 |
| Nickel (Ni), % | 50 to 55 | |
| 2.0 to 3.0 |
| Niobium (Nb), % | 4.8 to 5.5 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0.020 to 0.040 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.025 |
| Silicon (Si), % | 0 to 0.35 | |
| 0 to 0.5 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 to 0.015 |
| Titanium (Ti), % | 0.65 to 1.2 | |
| 0 |
| Vanadium (V), % | 0 | |
| 0.25 to 0.4 |