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6066 Aluminum vs. 2018 Aluminum

Both 6066 aluminum and 2018 aluminum are aluminum alloys. They have a moderately 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 (1, in this case) are not shown.

For each property being compared, the top bar is 6066 aluminum and the bottom bar is 2018 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
73
Elongation at Break, % 7.8 to 17
9.6
Fatigue Strength, MPa 94 to 130
120
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
27
Shear Strength, MPa 95 to 240
270
Tensile Strength: Ultimate (UTS), MPa 160 to 400
420
Tensile Strength: Yield (Proof), MPa 93 to 360
310

Thermal Properties

Latent Heat of Fusion, J/g 410
390
Maximum Temperature: Mechanical, °C 170
220
Melting Completion (Liquidus), °C 650
640
Melting Onset (Solidus), °C 560
510
Specific Heat Capacity, J/kg-K 890
870
Thermal Conductivity, W/m-K 150
150
Thermal Expansion, µm/m-K 23
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
40
Electrical Conductivity: Equal Weight (Specific), % IACS 130
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
11
Density, g/cm3 2.8
3.1
Embodied Carbon, kg CO2/kg material 8.3
8.1
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1160
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 52
37
Resilience: Unit (Modulus of Resilience), kJ/m3 61 to 920
670
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 49
45
Strength to Weight: Axial, points 16 to 39
38
Strength to Weight: Bending, points 23 to 43
41
Thermal Diffusivity, mm2/s 61
57
Thermal Shock Resistance, points 6.9 to 17
19

Alloy Composition

Aluminum (Al), % 93 to 97
89.7 to 94.4
Chromium (Cr), % 0 to 0.4
0 to 0.1
Copper (Cu), % 0.7 to 1.2
3.5 to 4.5
Iron (Fe), % 0 to 0.5
0 to 1.0
Magnesium (Mg), % 0.8 to 1.4
0.45 to 0.9
Manganese (Mn), % 0.6 to 1.1
0 to 0.2
Nickel (Ni), % 0
1.7 to 2.3
Silicon (Si), % 0.9 to 1.8
0 to 0.9
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0 to 0.25
0 to 0.25
Residuals, % 0
0 to 0.15