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5657 Aluminum vs. 7020 Aluminum

Both 5657 aluminum and 7020 aluminum are aluminum alloys. They have a moderately high 94% of their average alloy composition in common.

For each property being compared, the top bar is 5657 aluminum and the bottom bar is 7020 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 40 to 50
45 to 100
Elastic (Young's, Tensile) Modulus, GPa 68
70
Elongation at Break, % 6.6 to 15
8.4 to 14
Fatigue Strength, MPa 74 to 88
110 to 130
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 92 to 110
110 to 230
Tensile Strength: Ultimate (UTS), MPa 150 to 200
190 to 390
Tensile Strength: Yield (Proof), MPa 140 to 170
120 to 310

Thermal Properties

Latent Heat of Fusion, J/g 400
380
Maximum Temperature: Mechanical, °C 180
210
Melting Completion (Liquidus), °C 660
650
Melting Onset (Solidus), °C 640
610
Specific Heat Capacity, J/kg-K 900
880
Thermal Conductivity, W/m-K 210
150
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 54
39
Electrical Conductivity: Equal Weight (Specific), % IACS 180
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 2.7
2.9
Embodied Carbon, kg CO2/kg material 8.4
8.3
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 1200
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 9.7 to 27
23 to 46
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 200
110 to 690
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
47
Strength to Weight: Axial, points 15 to 20
18 to 37
Strength to Weight: Bending, points 23 to 28
25 to 41
Thermal Diffusivity, mm2/s 84
59
Thermal Shock Resistance, points 6.7 to 8.6
8.3 to 17

Alloy Composition

Aluminum (Al), % 98.5 to 99.4
91.2 to 94.8
Chromium (Cr), % 0
0.1 to 0.35
Copper (Cu), % 0 to 0.1
0 to 0.2
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.1
0 to 0.4
Magnesium (Mg), % 0.6 to 1.0
1.0 to 1.4
Manganese (Mn), % 0 to 0.030
0.050 to 0.5
Silicon (Si), % 0 to 0.080
0 to 0.35
Titanium (Ti), % 0
0 to 0.25
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 0 to 0.050
4.0 to 5.0
Zirconium (Zr), % 0
0.080 to 0.25
Residuals, % 0 to 0.050
0 to 0.15