7178 Aluminum vs. Grade 23 Titanium
7178 aluminum belongs to the aluminum alloys classification, while grade 23 titanium belongs to the titanium 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 7178 aluminum and the bottom bar is grade 23 titanium.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 71 | |
| 110 |
| Elongation at Break, % | 4.5 to 12 | |
| 6.7 to 11 |
| Fatigue Strength, MPa | 120 to 210 | |
| 470 to 500 |
| Poisson's Ratio | 0.32 | |
| 0.32 |
| Shear Modulus, GPa | 27 | |
| 40 |
| Shear Strength, MPa | 140 to 380 | |
| 540 to 570 |
| Tensile Strength: Ultimate (UTS), MPa | 240 to 640 | |
| 930 to 940 |
| Tensile Strength: Yield (Proof), MPa | 120 to 560 | |
| 850 to 870 |
Thermal Properties
| Latent Heat of Fusion, J/g | 370 | |
| 410 |
| Maximum Temperature: Mechanical, °C | 180 | |
| 340 |
| Melting Completion (Liquidus), °C | 630 | |
| 1610 |
| Melting Onset (Solidus), °C | 480 | |
| 1560 |
| Specific Heat Capacity, J/kg-K | 860 | |
| 560 |
| Thermal Conductivity, W/m-K | 130 | |
| 7.1 |
| Thermal Expansion, µm/m-K | 23 | |
| 9.4 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 31 | |
| 1.0 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 91 | |
| 2.0 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 10 | |
| 36 |
| Density, g/cm3 | 3.1 | |
| 4.4 |
| Embodied Carbon, kg CO2/kg material | 8.2 | |
| 38 |
| Embodied Energy, MJ/kg | 150 | |
| 610 |
| Embodied Water, L/kg | 1110 | |
| 200 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 24 to 52 | |
| 61 to 100 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 110 to 2220 | |
| 3430 to 3560 |
| Stiffness to Weight: Axial, points | 13 | |
| 13 |
| Stiffness to Weight: Bending, points | 45 | |
| 35 |
| Strength to Weight: Axial, points | 21 to 58 | |
| 58 to 59 |
| Strength to Weight: Bending, points | 28 to 54 | |
| 48 |
| Thermal Diffusivity, mm2/s | 47 | |
| 2.9 |
| Thermal Shock Resistance, points | 10 to 28 | |
| 67 to 68 |
Alloy Composition
| Aluminum (Al), % | 85.4 to 89.5 | |
| 5.5 to 6.5 |
| Carbon (C), % | 0 | |
| 0 to 0.080 |
| Chromium (Cr), % | 0.18 to 0.28 | |
| 0 |
| Copper (Cu), % | 1.6 to 2.4 | |
| 0 |
| Hydrogen (H), % | 0 | |
| 0 to 0.013 |
| Iron (Fe), % | 0 to 0.5 | |
| 0 to 0.25 |
| Magnesium (Mg), % | 2.4 to 3.1 | |
| 0 |
| Manganese (Mn), % | 0 to 0.3 | |
| 0 |
| Nitrogen (N), % | 0 | |
| 0 to 0.030 |
| Oxygen (O), % | 0 | |
| 0 to 0.13 |
| Silicon (Si), % | 0 to 0.4 | |
| 0 |
| Titanium (Ti), % | 0 to 0.2 | |
| 88.1 to 91 |
| Vanadium (V), % | 0 | |
| 3.5 to 4.5 |
| Zinc (Zn), % | 6.3 to 7.3 | |
| 0 |
| Residuals, % | 0 | |
| 0 to 0.4 |