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6061 Aluminum vs. 7020 Aluminum

Both 6061 aluminum and 7020 aluminum are aluminum alloys. They have a very high 95% 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 6061 aluminum and the bottom bar is 7020 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
70
Elongation at Break, % 3.4 to 20
8.4 to 14
Fatigue Strength, MPa 58 to 110
110 to 130
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 84 to 210
110 to 230
Tensile Strength: Ultimate (UTS), MPa 130 to 410
190 to 390
Tensile Strength: Yield (Proof), MPa 76 to 370
120 to 310

Thermal Properties

Latent Heat of Fusion, J/g 400
380
Maximum Temperature: Mechanical, °C 170
210
Melting Completion (Liquidus), °C 650
650
Melting Onset (Solidus), °C 580
610
Specific Heat Capacity, J/kg-K 900
880
Thermal Conductivity, W/m-K 170
150
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 43
39
Electrical Conductivity: Equal Weight (Specific), % IACS 140
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 8.3
8.3
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1180
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.8 to 81
23 to 46
Resilience: Unit (Modulus of Resilience), kJ/m3 42 to 1000
110 to 690
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
47
Strength to Weight: Axial, points 13 to 42
18 to 37
Strength to Weight: Bending, points 21 to 45
25 to 41
Thermal Diffusivity, mm2/s 68
59
Thermal Shock Resistance, points 5.7 to 18
8.3 to 17

Alloy Composition

Aluminum (Al), % 95.9 to 98.6
91.2 to 94.8
Chromium (Cr), % 0.040 to 0.35
0.1 to 0.35
Copper (Cu), % 0.15 to 0.4
0 to 0.2
Iron (Fe), % 0 to 0.7
0 to 0.4
Magnesium (Mg), % 0.8 to 1.2
1.0 to 1.4
Manganese (Mn), % 0 to 0.15
0.050 to 0.5
Silicon (Si), % 0.4 to 0.8
0 to 0.35
Titanium (Ti), % 0 to 0.15
0 to 0.25
Zinc (Zn), % 0 to 0.25
4.0 to 5.0
Zirconium (Zr), % 0
0.080 to 0.25
Residuals, % 0
0 to 0.15

Comparable Variants