Grade 5 Titanium vs. 7129 Aluminum
Grade 5 titanium belongs to the titanium alloys classification, while 7129 Aluminum belongs to the aluminum alloys. There are 30 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 5 titanium and the bottom bar is 7129 Aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 110 | |
| 69 |
| Elongation at Break, % | 8.6 to 11 | |
| 9.0 to 9.1 |
| Fatigue Strength, MPa | 530 to 630 | |
| 150 to 190 |
| Poisson's Ratio | 0.32 | |
| 0.33 |
| Shear Modulus, GPa | 40 | |
| 26 |
| Shear Strength, MPa | 600 to 710 | |
| 250 to 260 |
| Tensile Strength: Ultimate (UTS), MPa | 1000 to 1190 | |
| 430 |
| Tensile Strength: Yield (Proof), MPa | 910 to 1110 | |
| 380 to 390 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 380 |
| Maximum Temperature: Mechanical, °C | 330 | |
| 180 |
| Melting Completion (Liquidus), °C | 1610 | |
| 630 |
| Melting Onset (Solidus), °C | 1650 | |
| 510 |
| Specific Heat Capacity, J/kg-K | 560 | |
| 880 |
| Thermal Conductivity, W/m-K | 6.8 | |
| 150 |
| Thermal Expansion, µm/m-K | 8.9 | |
| 24 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 1.0 | |
| 40 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 2.0 | |
| 120 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 36 | |
| 9.5 |
| Density, g/cm3 | 4.4 | |
| 2.9 |
| Embodied Carbon, kg CO2/kg material | 38 | |
| 8.3 |
| Embodied Energy, MJ/kg | 610 | |
| 150 |
| Embodied Water, L/kg | 200 | |
| 1150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 100 to 110 | |
| 37 to 38 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 3980 to 5880 | |
| 1050 to 1090 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 35 | |
| 47 |
| Strength to Weight: Axial, points | 62 to 75 | |
| 41 |
| Strength to Weight: Bending, points | 50 to 56 | |
| 43 to 44 |
| Thermal Diffusivity, mm2/s | 2.7 | |
| 58 |
| Thermal Shock Resistance, points | 76 to 91 | |
| 19 |
Alloy Composition
| Aluminum (Al), % | 5.5 to 6.8 | |
| 91 to 94 |
| Carbon (C), % | 0 to 0.080 | |
| 0 |
| Chromium (Cr), % | 0 | |
| 0 to 0.1 |
| Copper (Cu), % | 0 | |
| 0.5 to 0.9 |
| Gallium (Ga), % | 0 | |
| 0 to 0.030 |
| Hydrogen (H), % | 0 to 0.015 | |
| 0 |
| Iron (Fe), % | 0 to 0.4 | |
| 0 to 0.3 |
| Magnesium (Mg), % | 0 | |
| 1.3 to 2.0 |
| Manganese (Mn), % | 0 | |
| 0 to 0.1 |
| Nitrogen (N), % | 0 to 0.050 | |
| 0 |
| Oxygen (O), % | 0 to 0.2 | |
| 0 |
| Silicon (Si), % | 0 | |
| 0 to 0.15 |
| Titanium (Ti), % | 87.4 to 91 | |
| 0 to 0.050 |
| Vanadium (V), % | 3.5 to 4.5 | |
| 0 to 0.050 |
| Yttrium (Y), % | 0 to 0.0050 | |
| 0 |
| Zinc (Zn), % | 0 | |
| 4.2 to 5.2 |
| Residuals, % | 0 | |
| 0 to 0.15 |