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6065 Aluminum vs. 7108 Aluminum

Both 6065 aluminum and 7108 aluminum are aluminum alloys. They have a very high 95% of their average alloy composition in common.

For each property being compared, the top bar is 6065 aluminum and the bottom bar is 7108 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
69
Elongation at Break, % 4.5 to 11
11
Fatigue Strength, MPa 96 to 110
120
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 190 to 230
210
Tensile Strength: Ultimate (UTS), MPa 310 to 400
350
Tensile Strength: Yield (Proof), MPa 270 to 380
290

Thermal Properties

Latent Heat of Fusion, J/g 400
380
Maximum Temperature: Mechanical, °C 180
210
Melting Completion (Liquidus), °C 640
630
Melting Onset (Solidus), °C 590
530
Specific Heat Capacity, J/kg-K 890
880
Thermal Conductivity, W/m-K 170
150
Thermal Expansion, µm/m-K 23
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 43
39
Electrical Conductivity: Equal Weight (Specific), % IACS 140
120

Otherwise Unclassified Properties

Base Metal Price, % relative 11
9.5
Density, g/cm3 2.8
2.9
Embodied Carbon, kg CO2/kg material 8.4
8.3
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1200
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 34
38
Resilience: Unit (Modulus of Resilience), kJ/m3 540 to 1040
620
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 49
47
Strength to Weight: Axial, points 31 to 40
34
Strength to Weight: Bending, points 36 to 43
38
Thermal Diffusivity, mm2/s 67
59
Thermal Shock Resistance, points 14 to 18
16

Alloy Composition

Aluminum (Al), % 94.4 to 98.2
92.4 to 94.7
Bismuth (Bi), % 0.5 to 1.5
0
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 0.15 to 0.4
0 to 0.050
Iron (Fe), % 0 to 0.7
0 to 0.1
Lead (Pb), % 0 to 0.050
0
Magnesium (Mg), % 0.8 to 1.2
0.7 to 1.4
Manganese (Mn), % 0 to 0.15
0 to 0.050
Silicon (Si), % 0.4 to 0.8
0 to 0.1
Titanium (Ti), % 0 to 0.1
0 to 0.050
Zinc (Zn), % 0 to 0.25
4.5 to 5.5
Zirconium (Zr), % 0 to 0.15
0.12 to 0.25
Residuals, % 0
0 to 0.15