7021 Aluminum vs. 705.0 Aluminum
Both 7021 aluminum and 705.0 aluminum are aluminum alloys. They have a very high 96% 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 705.0 aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 69 | |
| 69 |
| Elongation at Break, % | 9.4 | |
| 8.4 to 10 |
| Fatigue Strength, MPa | 150 | |
| 63 to 98 |
| Poisson's Ratio | 0.32 | |
| 0.33 |
| Shear Modulus, GPa | 26 | |
| 26 |
| Tensile Strength: Ultimate (UTS), MPa | 460 | |
| 240 to 260 |
| Tensile Strength: Yield (Proof), MPa | 390 | |
| 130 |
Thermal Properties
| Latent Heat of Fusion, J/g | 380 | |
| 390 |
| Maximum Temperature: Mechanical, °C | 200 | |
| 180 |
| Melting Completion (Liquidus), °C | 630 | |
| 640 |
| Melting Onset (Solidus), °C | 510 | |
| 610 |
| Specific Heat Capacity, J/kg-K | 870 | |
| 890 |
| Thermal Conductivity, W/m-K | 150 | |
| 140 |
| Thermal Expansion, µm/m-K | 24 | |
| 24 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 38 | |
| 34 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 120 | |
| 110 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.5 | |
| 9.5 |
| Density, g/cm3 | 2.9 | |
| 2.8 |
| Embodied Carbon, kg CO2/kg material | 8.3 | |
| 8.4 |
| Embodied Energy, MJ/kg | 150 | |
| 150 |
| Embodied Water, L/kg | 1140 | |
| 1170 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 41 | |
| 18 to 20 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 1110 | |
| 120 to 130 |
| Stiffness to Weight: Axial, points | 13 | |
| 14 |
| Stiffness to Weight: Bending, points | 47 | |
| 49 |
| Strength to Weight: Axial, points | 44 | |
| 24 to 26 |
| Strength to Weight: Bending, points | 45 | |
| 31 to 32 |
| Thermal Diffusivity, mm2/s | 59 | |
| 55 |
| Thermal Shock Resistance, points | 20 | |
| 11 |
Alloy Composition
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| Aluminum (Al), % | 90.7 to 93.7 | |
| 92.3 to 98.6 |
| Chromium (Cr), % | 0 to 0.050 | |
| 0 to 0.4 |
| Copper (Cu), % | 0 to 0.25 | |
| 0 to 0.2 |
| Iron (Fe), % | 0 to 0.4 | |
| 0 to 0.8 |
| Magnesium (Mg), % | 1.2 to 1.8 | |
| 1.4 to 1.8 |
| Manganese (Mn), % | 0 to 0.1 | |
| 0 to 0.6 |
| Silicon (Si), % | 0 to 0.25 | |
| 0 to 0.2 |
| Titanium (Ti), % | 0 to 0.1 | |
| 0 to 0.25 |
| Zinc (Zn), % | 5.0 to 6.0 | |
| 0 to 3.3 |
| Zirconium (Zr), % | 0.080 to 0.18 | |
| 0 |
| Residuals, % | 0 to 0.15 | |
| 0 to 0.15 |