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7021 Aluminum vs. A390.0 Aluminum

Both 7021 aluminum and A390.0 aluminum are aluminum alloys. They have 79% of their average alloy composition in common. There are 29 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 7021 aluminum and the bottom bar is A390.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
75
Elongation at Break, % 9.4
0.87 to 0.91
Fatigue Strength, MPa 150
70 to 100
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 26
28
Tensile Strength: Ultimate (UTS), MPa 460
190 to 290
Tensile Strength: Yield (Proof), MPa 390
190 to 290

Thermal Properties

Latent Heat of Fusion, J/g 380
640
Maximum Temperature: Mechanical, °C 200
170
Melting Completion (Liquidus), °C 630
580
Melting Onset (Solidus), °C 510
480
Specific Heat Capacity, J/kg-K 870
880
Thermal Conductivity, W/m-K 150
130
Thermal Expansion, µm/m-K 24
20

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
20
Electrical Conductivity: Equal Weight (Specific), % IACS 120
67

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
11
Density, g/cm3 2.9
2.7
Embodied Carbon, kg CO2/kg material 8.3
7.3
Embodied Energy, MJ/kg 150
140
Embodied Water, L/kg 1140
950

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 41
1.6 to 2.6
Resilience: Unit (Modulus of Resilience), kJ/m3 1110
240 to 580
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 47
52
Strength to Weight: Axial, points 44
19 to 30
Strength to Weight: Bending, points 45
27 to 36
Thermal Diffusivity, mm2/s 59
56
Thermal Shock Resistance, points 20
9.0 to 14

Alloy Composition


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Aluminum (Al), % 90.7 to 93.7
75.3 to 79.6
Chromium (Cr), % 0 to 0.050
0
Copper (Cu), % 0 to 0.25
4.0 to 5.0
Iron (Fe), % 0 to 0.4
0 to 0.5
Magnesium (Mg), % 1.2 to 1.8
0.45 to 0.65
Manganese (Mn), % 0 to 0.1
0 to 0.1
Silicon (Si), % 0 to 0.25
16 to 18
Titanium (Ti), % 0 to 0.1
0 to 0.2
Zinc (Zn), % 5.0 to 6.0
0 to 0.1
Zirconium (Zr), % 0.080 to 0.18
0
Residuals, % 0 to 0.15
0 to 0.2