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3105 Aluminum vs. 7108A Aluminum

Both 3105 aluminum and 7108A aluminum are aluminum alloys. They have a moderately high 94% 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 3105 aluminum and the bottom bar is 7108A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
69
Elongation at Break, % 1.1 to 20
11 to 13
Fatigue Strength, MPa 39 to 95
120 to 130
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 77 to 140
210
Tensile Strength: Ultimate (UTS), MPa 120 to 240
350
Tensile Strength: Yield (Proof), MPa 46 to 220
290 to 300

Thermal Properties

Latent Heat of Fusion, J/g 400
380
Maximum Temperature: Mechanical, °C 180
210
Melting Completion (Liquidus), °C 660
630
Melting Onset (Solidus), °C 640
520
Specific Heat Capacity, J/kg-K 900
870
Thermal Conductivity, W/m-K 170
150
Thermal Expansion, µm/m-K 24
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 44
36
Electrical Conductivity: Equal Weight (Specific), % IACS 140
110

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
10
Density, g/cm3 2.8
2.9
Embodied Carbon, kg CO2/kg material 8.2
8.3
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1180
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.6 to 19
38 to 44
Resilience: Unit (Modulus of Resilience), kJ/m3 15 to 340
610 to 640
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
47
Strength to Weight: Axial, points 12 to 24
33 to 34
Strength to Weight: Bending, points 20 to 31
38
Thermal Diffusivity, mm2/s 68
59
Thermal Shock Resistance, points 5.2 to 11
15 to 16

Alloy Composition

Aluminum (Al), % 96 to 99.5
91.6 to 94.4
Chromium (Cr), % 0 to 0.2
0 to 0.040
Copper (Cu), % 0 to 0.3
0 to 0.050
Gallium (Ga), % 0
0 to 0.030
Iron (Fe), % 0 to 0.7
0 to 0.3
Magnesium (Mg), % 0.2 to 0.8
0.7 to 1.5
Manganese (Mn), % 0.3 to 0.8
0 to 0.050
Silicon (Si), % 0 to 0.6
0 to 0.2
Titanium (Ti), % 0 to 0.1
0 to 0.030
Zinc (Zn), % 0 to 0.4
4.8 to 5.8
Zirconium (Zr), % 0
0.15 to 0.25
Residuals, % 0
0 to 0.15