Solution-treated Grade 21 Titanium vs. Solution Treated Nickel 718
Solution-treated grade 21 titanium belongs to the titanium alloys classification, while solution treated nickel 718 belongs to the nickel alloys. There are 28 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 solution-treated grade 21 titanium and the bottom bar is solution treated nickel 718.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 140 | |
| 190 |
| Elongation at Break, % | 17 | |
| 34 |
| Fatigue Strength, MPa | 550 | |
| 540 |
| Poisson's Ratio | 0.32 | |
| 0.29 |
| Shear Modulus, GPa | 51 | |
| 75 |
| Shear Strength, MPa | 550 | |
| 800 |
| Tensile Strength: Ultimate (UTS), MPa | 890 | |
| 1200 |
| Tensile Strength: Yield (Proof), MPa | 870 | |
| 750 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 310 |
| Maximum Temperature: Mechanical, °C | 310 | |
| 980 |
| Melting Completion (Liquidus), °C | 1740 | |
| 1340 |
| Melting Onset (Solidus), °C | 1690 | |
| 1260 |
| Specific Heat Capacity, J/kg-K | 500 | |
| 450 |
| Thermal Conductivity, W/m-K | 7.5 | |
| 11 |
| Thermal Expansion, µm/m-K | 7.1 | |
| 13 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 60 | |
| 75 |
| Density, g/cm3 | 5.4 | |
| 8.3 |
| Embodied Carbon, kg CO2/kg material | 32 | |
| 13 |
| Embodied Energy, MJ/kg | 490 | |
| 190 |
| Embodied Water, L/kg | 180 | |
| 250 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 150 | |
| 350 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 2760 | |
| 1440 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 32 | |
| 23 |
| Strength to Weight: Axial, points | 46 | |
| 40 |
| Strength to Weight: Bending, points | 38 | |
| 30 |
| Thermal Diffusivity, mm2/s | 2.8 | |
| 3.0 |
| Thermal Shock Resistance, points | 66 | |
| 35 |
Alloy Composition
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| Aluminum (Al), % | 2.5 to 3.5 | |
| 0.2 to 0.8 |
| Boron (B), % | 0 | |
| 0 to 0.0060 |
| Carbon (C), % | 0 to 0.050 | |
| 0 to 0.080 |
| Chromium (Cr), % | 0 | |
| 17 to 21 |
| Cobalt (Co), % | 0 | |
| 0 to 1.0 |
| Copper (Cu), % | 0 | |
| 0 to 0.3 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.4 | |
| 11.1 to 24.6 |
| Manganese (Mn), % | 0 | |
| 0 to 0.35 |
| Molybdenum (Mo), % | 14 to 16 | |
| 2.8 to 3.3 |
| Nickel (Ni), % | 0 | |
| 50 to 55 |
| Niobium (Nb), % | 2.2 to 3.2 | |
| 4.8 to 5.5 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 |
| Oxygen (O), % | 0 to 0.17 | |
| 0 |
| Phosphorus (P), % | 0 | |
| 0 to 0.015 |
| Silicon (Si), % | 0.15 to 0.25 | |
| 0 to 0.35 |
| Sulfur (S), % | 0 | |
| 0 to 0.015 |
| Titanium (Ti), % | 76 to 81.2 | |
| 0.65 to 1.2 |
| Residuals, % | 0 to 0.4 | |
| 0 |