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7021 Aluminum vs. 4015 Aluminum

Both 7021 aluminum and 4015 aluminum are aluminum alloys. They have a moderately high 93% 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 4015 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
70
Elongation at Break, % 9.4
1.1 to 23
Fatigue Strength, MPa 150
46 to 71
Poisson's Ratio 0.32
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 270
82 to 120
Tensile Strength: Ultimate (UTS), MPa 460
130 to 220
Tensile Strength: Yield (Proof), MPa 390
50 to 200

Thermal Properties

Latent Heat of Fusion, J/g 380
420
Maximum Temperature: Mechanical, °C 200
160
Melting Completion (Liquidus), °C 630
640
Melting Onset (Solidus), °C 510
600
Specific Heat Capacity, J/kg-K 870
900
Thermal Conductivity, W/m-K 150
160
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 38
41
Electrical Conductivity: Equal Weight (Specific), % IACS 120
130

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 2.9
2.7
Embodied Carbon, kg CO2/kg material 8.3
8.1
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1140
1160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 41
2.4 to 24
Resilience: Unit (Modulus of Resilience), kJ/m3 1110
18 to 290
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
50
Strength to Weight: Axial, points 44
13 to 22
Strength to Weight: Bending, points 45
21 to 30
Thermal Diffusivity, mm2/s 59
66
Thermal Shock Resistance, points 20
5.7 to 9.7

Alloy Composition

Aluminum (Al), % 90.7 to 93.7
94.9 to 97.9
Chromium (Cr), % 0 to 0.050
0
Copper (Cu), % 0 to 0.25
0 to 0.2
Iron (Fe), % 0 to 0.4
0 to 0.7
Magnesium (Mg), % 1.2 to 1.8
0.1 to 0.5
Manganese (Mn), % 0 to 0.1
0.6 to 1.2
Silicon (Si), % 0 to 0.25
1.4 to 2.2
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 5.0 to 6.0
0 to 0.2
Zirconium (Zr), % 0.080 to 0.18
0
Residuals, % 0 to 0.15
0 to 0.15