707.0 Aluminum vs. Grade 18 Titanium
707.0 aluminum belongs to the aluminum alloys classification, while grade 18 titanium belongs to the titanium alloys. There are 28 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 707.0 aluminum and the bottom bar is grade 18 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 70 | |
| 110 |
| Elongation at Break, % | 1.7 to 3.4 | |
| 11 to 17 |
| Fatigue Strength, MPa | 75 to 140 | |
| 330 to 480 |
| Poisson's Ratio | 0.33 | |
| 0.32 |
| Shear Modulus, GPa | 26 | |
| 40 |
| Tensile Strength: Ultimate (UTS), MPa | 270 to 300 | |
| 690 to 980 |
| Tensile Strength: Yield (Proof), MPa | 170 to 250 | |
| 540 to 810 |
Thermal Properties
| Latent Heat of Fusion, J/g | 380 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 180 | |
| 330 |
| Melting Completion (Liquidus), °C | 630 | |
| 1640 |
| Melting Onset (Solidus), °C | 600 | |
| 1590 |
| Specific Heat Capacity, J/kg-K | 880 | |
| 550 |
| Thermal Conductivity, W/m-K | 150 | |
| 8.3 |
| Thermal Expansion, µm/m-K | 24 | |
| 9.9 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 37 | |
| 1.3 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 110 | |
| 2.7 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.9 | |
| 4.5 |
| Embodied Carbon, kg CO2/kg material | 8.3 | |
| 41 |
| Embodied Energy, MJ/kg | 150 | |
| 670 |
| Embodied Water, L/kg | 1140 | |
| 270 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 4.3 to 8.6 | |
| 87 to 110 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 210 to 430 | |
| 1380 to 3110 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 47 | |
| 35 |
| Strength to Weight: Axial, points | 26 to 29 | |
| 43 to 61 |
| Strength to Weight: Bending, points | 32 to 34 | |
| 39 to 49 |
| Thermal Diffusivity, mm2/s | 58 | |
| 3.4 |
| Thermal Shock Resistance, points | 12 to 13 | |
| 47 to 67 |
Alloy Composition
| Aluminum (Al), % | 90.5 to 93.6 | |
| 2.5 to 3.5 |
| Carbon (C), % | 0 | |
| 0 to 0.080 |
| Chromium (Cr), % | 0.2 to 0.4 | |
| 0 |
| Copper (Cu), % | 0 to 0.2 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.015 |
| Iron (Fe), % | 0 to 0.8 | |
| 0 to 0.25 |
| Magnesium (Mg), % | 1.8 to 2.4 | |
| 0 |
| Manganese (Mn), % | 0.4 to 0.6 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.15 |
| Palladium (Pd), % | 0 | |
| 0.040 to 0.080 |
| Silicon (Si), % | 0 to 0.2 | |
| 0 |
| Titanium (Ti), % | 0 to 0.25 | |
| 92.5 to 95.5 |
| Vanadium (V), % | 0 | |
| 2.0 to 3.0 |
| Zinc (Zn), % | 4.0 to 4.5 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.4 |