7178 Aluminum vs. ZA-27
7178 aluminum belongs to the aluminum alloys classification, while ZA-27 belongs to the zinc alloys. They have a modest 35% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.
For each property being compared, the top bar is 7178 aluminum and the bottom bar is ZA-27.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 71 | |
| 78 |
| Elongation at Break, % | 4.5 to 12 | |
| 2.0 to 4.5 |
| Fatigue Strength, MPa | 120 to 210 | |
| 110 to 170 |
| Poisson's Ratio | 0.32 | |
| 0.27 |
| Shear Modulus, GPa | 27 | |
| 31 |
| Shear Strength, MPa | 140 to 380 | |
| 230 to 330 |
| Tensile Strength: Ultimate (UTS), MPa | 240 to 640 | |
| 400 to 430 |
| Tensile Strength: Yield (Proof), MPa | 120 to 560 | |
| 260 to 370 |
Thermal Properties
| Latent Heat of Fusion, J/g | 370 | |
| 130 |
| Maximum Temperature: Mechanical, °C | 180 | |
| 120 |
| Melting Completion (Liquidus), °C | 630 | |
| 480 |
| Melting Onset (Solidus), °C | 480 | |
| 380 |
| Specific Heat Capacity, J/kg-K | 860 | |
| 530 |
| Thermal Conductivity, W/m-K | 130 | |
| 130 |
| Thermal Expansion, µm/m-K | 23 | |
| 26 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 31 | |
| 30 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 91 | |
| 53 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 10 | |
| 11 |
| Density, g/cm3 | 3.1 | |
| 5.0 |
| Embodied Carbon, kg CO2/kg material | 8.2 | |
| 4.2 |
| Embodied Energy, MJ/kg | 150 | |
| 80 |
| Embodied Water, L/kg | 1110 | |
| 570 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 24 to 52 | |
| 8.1 to 18 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 110 to 2220 | |
| 420 to 890 |
| Stiffness to Weight: Axial, points | 13 | |
| 8.6 |
| Stiffness to Weight: Bending, points | 45 | |
| 28 |
| Strength to Weight: Axial, points | 21 to 58 | |
| 22 to 24 |
| Strength to Weight: Bending, points | 28 to 54 | |
| 24 to 25 |
| Thermal Diffusivity, mm2/s | 47 | |
| 47 |
| Thermal Shock Resistance, points | 10 to 28 | |
| 14 to 15 |
Alloy Composition
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| Aluminum (Al), % | 85.4 to 89.5 | |
| 25 to 28 |
| Cadmium (Cd), % | 0 | |
| 0 to 0.0060 |
| Chromium (Cr), % | 0.18 to 0.28 | |
| 0 |
| Copper (Cu), % | 1.6 to 2.4 | |
| 2.0 to 2.5 |
| Iron (Fe), % | 0 to 0.5 | |
| 0 to 0.1 |
| Lead (Pb), % | 0 | |
| 0 to 0.0060 |
| Magnesium (Mg), % | 2.4 to 3.1 | |
| 0.010 to 0.020 |
| Manganese (Mn), % | 0 to 0.3 | |
| 0 |
| Nickel (Ni), % | 0 | |
| 0 to 0.020 |
| Silicon (Si), % | 0 to 0.4 | |
| 0 to 0.080 |
| Tin (Sn), % | 0 | |
| 0 to 0.0030 |
| Titanium (Ti), % | 0 to 0.2 | |
| 0 |
| Zinc (Zn), % | 6.3 to 7.3 | |
| 69.3 to 73 |
| Residuals, % | 0 to 0.15 | |
| 0 |