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6061 Aluminum vs. 6066 Aluminum

Both 6061 aluminum and 6066 aluminum are aluminum alloys. They have a very high 98% 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 6061 aluminum and the bottom bar is 6066 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
70
Elongation at Break, % 3.4 to 20
7.8 to 17
Fatigue Strength, MPa 58 to 110
94 to 130
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 84 to 210
95 to 240
Tensile Strength: Ultimate (UTS), MPa 130 to 410
160 to 400
Tensile Strength: Yield (Proof), MPa 76 to 370
93 to 360

Thermal Properties

Latent Heat of Fusion, J/g 400
410
Maximum Temperature: Mechanical, °C 170
170
Melting Completion (Liquidus), °C 650
650
Melting Onset (Solidus), °C 580
560
Specific Heat Capacity, J/kg-K 900
890
Thermal Conductivity, W/m-K 170
150
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 43
40
Electrical Conductivity: Equal Weight (Specific), % IACS 140
130

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 2.7
2.8
Embodied Carbon, kg CO2/kg material 8.3
8.3
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1180
1160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.8 to 81
23 to 52
Resilience: Unit (Modulus of Resilience), kJ/m3 42 to 1000
61 to 920
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
49
Strength to Weight: Axial, points 13 to 42
16 to 39
Strength to Weight: Bending, points 21 to 45
23 to 43
Thermal Diffusivity, mm2/s 68
61
Thermal Shock Resistance, points 5.7 to 18
6.9 to 17

Alloy Composition

Aluminum (Al), % 95.9 to 98.6
93 to 97
Chromium (Cr), % 0.040 to 0.35
0 to 0.4
Copper (Cu), % 0.15 to 0.4
0.7 to 1.2
Iron (Fe), % 0 to 0.7
0 to 0.5
Magnesium (Mg), % 0.8 to 1.2
0.8 to 1.4
Manganese (Mn), % 0 to 0.15
0.6 to 1.1
Silicon (Si), % 0.4 to 0.8
0.9 to 1.8
Titanium (Ti), % 0 to 0.15
0 to 0.2
Zinc (Zn), % 0 to 0.25
0 to 0.25
Residuals, % 0 to 0.15
0 to 0.15

Comparable Variants