Grade 18 Titanium vs. 7022 Aluminum
Grade 18 titanium belongs to the titanium alloys classification, while 7022 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.
For each property being compared, the top bar is grade 18 titanium and the bottom bar is 7022 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 70 |
| Elongation at Break, % | 11 to 17 | |
| 6.3 to 8.0 |
| Fatigue Strength, MPa | 330 to 480 | |
| 140 to 170 |
| Poisson's Ratio | 0.32 | |
| 0.32 |
| Shear Modulus, GPa | 40 | |
| 26 |
| Shear Strength, MPa | 420 to 590 | |
| 290 to 320 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 980 | |
| 490 to 540 |
| Tensile Strength: Yield (Proof), MPa | 540 to 810 | |
| 390 to 460 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 380 |
| Maximum Temperature: Mechanical, °C | 330 | |
| 200 |
| Melting Completion (Liquidus), °C | 1640 | |
| 640 |
| Melting Onset (Solidus), °C | 1590 | |
| 480 |
| Specific Heat Capacity, J/kg-K | 550 | |
| 870 |
| Thermal Conductivity, W/m-K | 8.3 | |
| 140 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 24 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.3 | |
| 21 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.7 | |
| 65 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.5 | |
| 2.9 |
| Embodied Carbon, kg CO2/kg material | 41 | |
| 8.5 |
| Embodied Energy, MJ/kg | 670 | |
| 150 |
| Embodied Water, L/kg | 270 | |
| 1130 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 87 to 110 | |
| 29 to 40 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1380 to 3110 | |
| 1100 to 1500 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 35 | |
| 47 |
| Strength to Weight: Axial, points | 43 to 61 | |
| 47 to 51 |
| Strength to Weight: Bending, points | 39 to 49 | |
| 47 to 50 |
| Thermal Diffusivity, mm2/s | 3.4 | |
| 54 |
| Thermal Shock Resistance, points | 47 to 67 | |
| 21 to 23 |
Alloy Composition
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| Aluminum (Al), % | 2.5 to 3.5 | |
| 87.9 to 92.4 |
| Carbon (C), % | 0 to 0.080 | |
| 0 |
| Chromium (Cr), % | 0 | |
| 0.1 to 0.3 |
| Copper (Cu), % | 0 | |
| 0.5 to 1.0 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.25 | |
| 0 to 0.5 |
| Magnesium (Mg), % | 0 | |
| 2.6 to 3.7 |
| Manganese (Mn), % | 0 | |
| 0.1 to 0.4 |
| Nitrogen (N), % | 0 to 0.030 | |
| 0 |
| Oxygen (O), % | 0 to 0.15 | |
| 0 |
| Palladium (Pd), % | 0.040 to 0.080 | |
| 0 |
| Silicon (Si), % | 0 | |
| 0 to 0.5 |
| Titanium (Ti), % | 92.5 to 95.5 | |
| 0 to 0.2 |
| Vanadium (V), % | 2.0 to 3.0 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 4.3 to 5.2 |
| Zirconium (Zr), % | 0 | |
| 0 to 0.2 |
| Residuals, % | 0 to 0.4 | |
| 0 to 0.15 |