7021 Aluminum vs. 328.0 Aluminum
Both 7021 aluminum and 328.0 aluminum are aluminum alloys. They have 90% of their average alloy composition in common. There are 29 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.
For each property being compared, the top bar is 7021 aluminum and the bottom bar is 328.0 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 69 | |
| 72 |
| Elongation at Break, % | 9.4 | |
| 1.6 to 2.1 |
| Fatigue Strength, MPa | 150 | |
| 55 to 80 |
| Poisson's Ratio | 0.32 | |
| 0.33 |
| Shear Modulus, GPa | 26 | |
| 27 |
| Tensile Strength: Ultimate (UTS), MPa | 460 | |
| 200 to 270 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 120 to 170 |
Thermal Properties
| Latent Heat of Fusion, J/g | 380 | |
| 510 |
| Maximum Temperature: Mechanical, °C | 200 | |
| 180 |
| Melting Completion (Liquidus), °C | 630 | |
| 620 |
| Melting Onset (Solidus), °C | 510 | |
| 560 |
| Specific Heat Capacity, J/kg-K | 870 | |
| 890 |
| Thermal Conductivity, W/m-K | 150 | |
| 120 |
| Thermal Expansion, µm/m-K | 24 | |
| 22 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 38 | |
| 30 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 120 | |
| 99 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.5 | |
| 10 |
| Density, g/cm3 | 2.9 | |
| 2.7 |
| Embodied Carbon, kg CO2/kg material | 8.3 | |
| 7.8 |
| Embodied Energy, MJ/kg | 150 | |
| 140 |
| Embodied Water, L/kg | 1140 | |
| 1070 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 41 | |
| 2.8 to 5.0 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1110 | |
| 92 to 200 |
| Stiffness to Weight: Axial, points | 13 | |
| 15 |
| Stiffness to Weight: Bending, points | 47 | |
| 51 |
| Strength to Weight: Axial, points | 44 | |
| 21 to 28 |
| Strength to Weight: Bending, points | 45 | |
| 28 to 34 |
| Thermal Diffusivity, mm2/s | 59 | |
| 50 |
| Thermal Shock Resistance, points | 20 | |
| 9.2 to 12 |
Alloy Composition
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| Aluminum (Al), % | 90.7 to 93.7 | |
| 84.5 to 91.1 |
| Chromium (Cr), % | 0 to 0.050 | |
| 0 to 0.35 |
| Copper (Cu), % | 0 to 0.25 | |
| 1.0 to 2.0 |
| Iron (Fe), % | 0 to 0.4 | |
| 0 to 1.0 |
| Magnesium (Mg), % | 1.2 to 1.8 | |
| 0.2 to 0.6 |
| Manganese (Mn), % | 0 to 0.1 | |
| 0.2 to 0.6 |
| Nickel (Ni), % | 0 | |
| 0 to 0.25 |
| Silicon (Si), % | 0 to 0.25 | |
| 7.5 to 8.5 |
| Titanium (Ti), % | 0 to 0.1 | |
| 0 to 0.25 |
| Zinc (Zn), % | 5.0 to 6.0 | |
| 0 to 1.5 |
| Zirconium (Zr), % | 0.080 to 0.18 | |
| 0 |
| Residuals, % | 0 to 0.15 | |
| 0 to 0.5 |