Grade 18 Titanium vs. 515.0 Aluminum
Grade 18 titanium belongs to the titanium alloys classification, while 515.0 aluminum belongs to the aluminum alloys. There are 22 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.
For each property being compared, the top bar is grade 18 titanium and the bottom bar is 515.0 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 70 |
| Elongation at Break, % | 11 to 17 | |
| 10 |
| Fatigue Strength, MPa | 330 to 480 | |
| 130 |
| Poisson's Ratio | 0.32 | |
| 0.33 |
| Shear Modulus, GPa | 40 | |
| 26 |
| Shear Strength, MPa | 420 to 590 | |
| 190 |
| Tensile Strength: Ultimate (UTS), MPa | 690 to 980 | |
| 280 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 470 |
| Maximum Temperature: Mechanical, °C | 330 | |
| 170 |
| Melting Completion (Liquidus), °C | 1640 | |
| 620 |
| Melting Onset (Solidus), °C | 1590 | |
| 620 |
| Specific Heat Capacity, J/kg-K | 550 | |
| 900 |
| Thermal Expansion, µm/m-K | 9.9 | |
| 23 |
Otherwise Unclassified Properties
| Density, g/cm3 | 4.5 | |
| 2.6 |
| Embodied Carbon, kg CO2/kg material | 41 | |
| 8.4 |
| Embodied Energy, MJ/kg | 670 | |
| 150 |
| Embodied Water, L/kg | 270 | |
| 1120 |
Common Calculations
| Stiffness to Weight: Axial, points | 13 | |
| 15 |
| Stiffness to Weight: Bending, points | 35 | |
| 52 |
| Strength to Weight: Axial, points | 43 to 61 | |
| 30 |
| Strength to Weight: Bending, points | 39 to 49 | |
| 36 |
| Thermal Shock Resistance, points | 47 to 67 | |
| 13 |
Alloy Composition
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| Aluminum (Al), % | 2.5 to 3.5 | |
| 93.6 to 96.6 |
| Carbon (C), % | 0 to 0.080 | |
| 0 |
| Copper (Cu), % | 0 | |
| 0 to 0.2 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.25 | |
| 0 to 1.3 |
| Magnesium (Mg), % | 0 | |
| 2.5 to 4.0 |
| Manganese (Mn), % | 0 | |
| 0.4 to 0.6 |
| 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 | |
| 0.5 to 10 |
| Titanium (Ti), % | 92.5 to 95.5 | |
| 0 |
| Vanadium (V), % | 2.0 to 3.0 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 0 to 0.1 |
| Residuals, % | 0 to 0.4 | |
| 0 to 0.15 |