Nickel 718 vs. Grade 18 Titanium
Nickel 718 belongs to the nickel alloys classification, while grade 18 titanium belongs to the titanium alloys. There are 30 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 nickel 718 and the bottom bar is grade 18 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 190 | |
| 110 |
| Elongation at Break, % | 12 to 50 | |
| 11 to 17 |
| Fatigue Strength, MPa | 460 to 760 | |
| 330 to 480 |
| Poisson's Ratio | 0.29 | |
| 0.32 |
| Reduction in Area, % | 34 to 64 | |
| 23 |
| Shear Modulus, GPa | 75 | |
| 40 |
| Shear Strength, MPa | 660 to 950 | |
| 420 to 590 |
| Tensile Strength: Ultimate (UTS), MPa | 930 to 1530 | |
| 690 to 980 |
| Tensile Strength: Yield (Proof), MPa | 510 to 1330 | |
| 540 to 810 |
Thermal Properties
| Latent Heat of Fusion, J/g | 310 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 980 | |
| 330 |
| Melting Completion (Liquidus), °C | 1340 | |
| 1640 |
| Melting Onset (Solidus), °C | 1260 | |
| 1590 |
| Specific Heat Capacity, J/kg-K | 450 | |
| 550 |
| Thermal Conductivity, W/m-K | 11 | |
| 8.3 |
| Thermal Expansion, µm/m-K | 13 | |
| 9.9 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.4 | |
| 1.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 1.5 | |
| 2.7 |
Otherwise Unclassified Properties
| Density, g/cm3 | 8.3 | |
| 4.5 |
| Embodied Carbon, kg CO2/kg material | 13 | |
| 41 |
| Embodied Energy, MJ/kg | 190 | |
| 670 |
| Embodied Water, L/kg | 250 | |
| 270 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 140 to 390 | |
| 87 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 660 to 4560 | |
| 1380 to 3110 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 23 | |
| 35 |
| Strength to Weight: Axial, points | 31 to 51 | |
| 43 to 61 |
| Strength to Weight: Bending, points | 25 to 35 | |
| 39 to 49 |
| Thermal Diffusivity, mm2/s | 3.0 | |
| 3.4 |
| Thermal Shock Resistance, points | 27 to 44 | |
| 47 to 67 |
Alloy Composition
| Aluminum (Al), % | 0.2 to 0.8 | |
| 2.5 to 3.5 |
| Boron (B), % | 0 to 0.0060 | |
| 0 |
| Carbon (C), % | 0 to 0.080 | |
| 0 to 0.080 |
| Chromium (Cr), % | 17 to 21 | |
| 0 |
| Cobalt (Co), % | 0 to 1.0 | |
| 0 |
| Copper (Cu), % | 0 to 0.3 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 11.1 to 24.6 | |
| 0 to 0.25 |
| 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 |
| Nitrogen (N), % | 0 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.15 |
| Palladium (Pd), % | 0 | |
| 0.040 to 0.080 |
| Phosphorus (P), % | 0 to 0.015 | |
| 0 |
| Silicon (Si), % | 0 to 0.35 | |
| 0 |
| Sulfur (S), % | 0 to 0.015 | |
| 0 |
| Titanium (Ti), % | 0.65 to 1.2 | |
| 92.5 to 95.5 |
| Vanadium (V), % | 0 | |
| 2.0 to 3.0 |
| Residuals, % | 0 | |
| 0 to 0.4 |