Nickel 718 vs. Ductile Cast Iron
Nickel 718 belongs to the nickel alloys classification, while ductile cast iron belongs to the iron alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.
For each property being compared, the top bar is nickel 718 and the bottom bar is ductile cast iron.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 170 to 180 |
| Elongation at Break, % | 12 to 50 | |
| 2.1 to 20 |
| Fracture Toughness, MPa-m1/2 | 220 | |
| 14 to 30 |
| Poisson's Ratio | 0.29 | |
| 0.28 to 0.31 |
| Shear Modulus, GPa | 75 | |
| 64 to 70 |
| Shear Strength, MPa | 660 to 950 | |
| 420 to 800 |
| Tensile Strength: Ultimate (UTS), MPa | 930 to 1530 | |
| 460 to 920 |
| Tensile Strength: Yield (Proof), MPa | 510 to 1330 | |
| 310 to 670 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 270 |
| Maximum Temperature: Mechanical, °C | 980 | |
| 290 |
| Melting Completion (Liquidus), °C | 1340 | |
| 1160 |
| Melting Onset (Solidus), °C | 1260 | |
| 1120 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 490 |
| Thermal Conductivity, W/m-K | 11 | |
| 31 to 36 |
| Thermal Expansion, µm/m-K | 13 | |
| 11 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.4 | |
| 7.4 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.5 | |
| 8.8 to 9.4 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 75 | |
| 1.9 |
| Density, g/cm3 | 8.3 | |
| 7.1 to 7.5 |
| Embodied Carbon, kg CO2/kg material | 13 | |
| 1.5 |
| Embodied Energy, MJ/kg | 190 | |
| 21 |
| Embodied Water, L/kg | 250 | |
| 43 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 390 | |
| 17 to 80 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 660 to 4560 | |
| 280 to 1330 |
| Stiffness to Weight: Axial, points | 13 | |
| 12 to 14 |
| Stiffness to Weight: Bending, points | 23 | |
| 24 to 26 |
| Strength to Weight: Axial, points | 31 to 51 | |
| 17 to 35 |
| Strength to Weight: Bending, points | 25 to 35 | |
| 18 to 29 |
| Thermal Diffusivity, mm2/s | 3.0 | |
| 8.9 to 10 |
| Thermal Shock Resistance, points | 27 to 44 | |
| 17 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 | |
| 3.0 to 3.5 |
| Chromium (Cr), % | 17 to 21 | |
| 0 |
| Cobalt (Co), % | 0 to 1.0 | |
| 0 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 |
| Iron (Fe), % | 11.1 to 24.6 | |
| 93.7 to 95.5 |
| Manganese (Mn), % | 0 to 0.35 | |
| 0 |
| Molybdenum (Mo), % | 2.8 to 3.3 | |
| 0 |
| Nickel (Ni), % | 50 to 55 | |
| 0 |
| Niobium (Nb), % | 4.8 to 5.5 | |
| 0 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 to 0.080 |
| Silicon (Si), % | 0 to 0.35 | |
| 1.5 to 2.8 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Titanium (Ti), % | 0.65 to 1.2 | |
| 0 |