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7021 Aluminum vs. 384.0 Aluminum

Both 7021 aluminum and 384.0 aluminum are aluminum alloys. They have 84% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is 7021 aluminum and the bottom bar is 384.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
74
Elongation at Break, % 9.4
2.5
Fatigue Strength, MPa 150
140
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 26
28
Shear Strength, MPa 270
200
Tensile Strength: Ultimate (UTS), MPa 460
330
Tensile Strength: Yield (Proof), MPa 390
170

Thermal Properties

Latent Heat of Fusion, J/g 380
550
Maximum Temperature: Mechanical, °C 200
170
Melting Completion (Liquidus), °C 630
580
Melting Onset (Solidus), °C 510
530
Specific Heat Capacity, J/kg-K 870
870
Thermal Conductivity, W/m-K 150
96
Thermal Expansion, µm/m-K 24
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
22
Electrical Conductivity: Equal Weight (Specific), % IACS 120
69

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
11
Density, g/cm3 2.9
2.9
Embodied Carbon, kg CO2/kg material 8.3
7.4
Embodied Energy, MJ/kg 150
140
Embodied Water, L/kg 1140
1010

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 41
6.9
Resilience: Unit (Modulus of Resilience), kJ/m3 1110
190
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
49
Strength to Weight: Axial, points 44
32
Strength to Weight: Bending, points 45
37
Thermal Diffusivity, mm2/s 59
39
Thermal Shock Resistance, points 20
15

Alloy Composition


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Aluminum (Al), % 90.7 to 93.7
77.3 to 86.5
Chromium (Cr), % 0 to 0.050
0
Copper (Cu), % 0 to 0.25
3.0 to 4.5
Iron (Fe), % 0 to 0.4
0 to 1.3
Magnesium (Mg), % 1.2 to 1.8
0 to 0.1
Manganese (Mn), % 0 to 0.1
0 to 0.5
Nickel (Ni), % 0
0 to 0.5
Silicon (Si), % 0 to 0.25
10.5 to 12
Tin (Sn), % 0
0 to 0.35
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 5.0 to 6.0
0 to 3.0
Zirconium (Zr), % 0.080 to 0.18
0
Residuals, % 0 to 0.15
0 to 0.5