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7020 Aluminum vs. 4004 Aluminum

Both 7020 aluminum and 4004 aluminum are aluminum alloys. They have 90% of their average alloy composition in common. There are 30 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 7020 aluminum and the bottom bar is 4004 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
71
Elongation at Break, % 8.4 to 14
2.4
Fatigue Strength, MPa 110 to 130
42
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
27
Shear Strength, MPa 110 to 230
63
Tensile Strength: Ultimate (UTS), MPa 190 to 390
110
Tensile Strength: Yield (Proof), MPa 120 to 310
60

Thermal Properties

Latent Heat of Fusion, J/g 380
540
Maximum Temperature: Mechanical, °C 210
160
Melting Completion (Liquidus), °C 650
600
Melting Onset (Solidus), °C 610
560
Specific Heat Capacity, J/kg-K 880
910
Thermal Conductivity, W/m-K 150
130
Thermal Expansion, µm/m-K 23
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
33
Electrical Conductivity: Equal Weight (Specific), % IACS 120
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 2.9
2.6
Embodied Carbon, kg CO2/kg material 8.3
8.0
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1150
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 46
2.3
Resilience: Unit (Modulus of Resilience), kJ/m3 110 to 690
25
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 47
54
Strength to Weight: Axial, points 18 to 37
12
Strength to Weight: Bending, points 25 to 41
20
Thermal Diffusivity, mm2/s 59
58
Thermal Shock Resistance, points 8.3 to 17
5.1

Alloy Composition

Aluminum (Al), % 91.2 to 94.8
86 to 90
Chromium (Cr), % 0.1 to 0.35
0
Copper (Cu), % 0 to 0.2
0 to 0.25
Iron (Fe), % 0 to 0.4
0 to 0.8
Magnesium (Mg), % 1.0 to 1.4
1.0 to 2.0
Manganese (Mn), % 0.050 to 0.5
0 to 0.1
Silicon (Si), % 0 to 0.35
9.0 to 10.5
Titanium (Ti), % 0 to 0.25
0
Zinc (Zn), % 4.0 to 5.0
0 to 0.2
Zirconium (Zr), % 0.080 to 0.25
0
Residuals, % 0
0 to 0.15