4007-O Aluminum vs. 7020-O Aluminum
Both 4007-O aluminum and 7020-O aluminum are aluminum alloys. Both are furnished in the annealed condition. They have a moderately high 94% of their average alloy composition in common.
For each property being compared, the top bar is 4007-O aluminum and the bottom bar is 7020-O aluminum.
Metric UnitsUS Customary Units
Mechanical Properties
| Brinell Hardness | 32 | |
| 45 |
| Elastic (Young's, Tensile) Modulus, GPa | 71 | |
| 70 |
| Elongation at Break, % | 23 | |
| 14 |
| Fatigue Strength, MPa | 56 | |
| 130 |
| Poisson's Ratio | 0.33 | |
| 0.33 |
| Shear Modulus, GPa | 27 | |
| 26 |
| Shear Strength, MPa | 80 | |
| 110 |
| Tensile Strength: Ultimate (UTS), MPa | 130 | |
| 190 |
| Tensile Strength: Yield (Proof), MPa | 50 | |
| 120 |
Thermal Properties
| Latent Heat of Fusion, J/g | 410 | |
| 380 |
| Maximum Temperature: Mechanical, °C | 170 | |
| 210 |
| Melting Completion (Liquidus), °C | 650 | |
| 650 |
| Melting Onset (Solidus), °C | 590 | |
| 610 |
| Specific Heat Capacity, J/kg-K | 890 | |
| 880 |
| Thermal Conductivity, W/m-K | 170 | |
| 150 |
| Thermal Expansion, µm/m-K | 23 | |
| 23 |
Electrical Properties
| Electrical Conductivity: Equal Volume, % IACS | 42 | |
| 39 |
| Electrical Conductivity: Equal Weight (Specific), % IACS | 140 | |
| 120 |
Otherwise Unclassified Properties
| Base Metal Price, % relative | 9.5 | |
| 9.5 |
| Density, g/cm3 | 2.8 | |
| 2.9 |
| Embodied Carbon, kg CO2/kg material | 8.1 | |
| 8.3 |
| Embodied Energy, MJ/kg | 150 | |
| 150 |
| Embodied Water, L/kg | 1160 | |
| 1150 |
Common Calculations
| Resilience: Ultimate (Unit Rupture Work), MJ/m3 | 23 | |
| 23 |
| Resilience: Unit (Modulus of Resilience), kJ/m3 | 18 | |
| 110 |
| Stiffness to Weight: Axial, points | 14 | |
| 13 |
| Stiffness to Weight: Bending, points | 49 | |
| 47 |
| Strength to Weight: Axial, points | 12 | |
| 18 |
| Strength to Weight: Bending, points | 20 | |
| 25 |
| Thermal Diffusivity, mm2/s | 67 | |
| 59 |
| Thermal Shock Resistance, points | 5.5 | |
| 8.3 |
Alloy Composition
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| Aluminum (Al), % | 94.1 to 97.6 | |
| 91.2 to 94.8 |
| Chromium (Cr), % | 0.050 to 0.25 | |
| 0.1 to 0.35 |
| Cobalt (Co), % | 0 to 0.050 | |
| 0 |
| Copper (Cu), % | 0 to 0.2 | |
| 0 to 0.2 |
| Iron (Fe), % | 0.4 to 1.0 | |
| 0 to 0.4 |
| Magnesium (Mg), % | 0 to 0.2 | |
| 1.0 to 1.4 |
| Manganese (Mn), % | 0.8 to 1.5 | |
| 0.050 to 0.5 |
| Nickel (Ni), % | 0.15 to 0.7 | |
| 0 |
| Silicon (Si), % | 1.0 to 1.7 | |
| 0 to 0.35 |
| Titanium (Ti), % | 0 to 0.1 | |
| 0 to 0.25 |
| Zinc (Zn), % | 0 to 0.1 | |
| 4.0 to 5.0 |
| Zirconium (Zr), % | 0 | |
| 0.080 to 0.25 |
| Residuals, % | 0 to 0.15 | |
| 0 to 0.15 |