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7108A Aluminum vs. 7175 Aluminum

Both 7108A aluminum and 7175 aluminum are aluminum alloys. They have a very high 96% of their average alloy composition in common.

For each property being compared, the top bar is 7108A aluminum and the bottom bar is 7175 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
70
Elongation at Break, % 11 to 13
3.8 to 5.9
Fatigue Strength, MPa 120 to 130
150 to 180
Poisson's Ratio 0.33
0.32
Shear Modulus, GPa 26
26
Shear Strength, MPa 210
290 to 330
Tensile Strength: Ultimate (UTS), MPa 350
520 to 570
Tensile Strength: Yield (Proof), MPa 290 to 300
430 to 490

Thermal Properties

Latent Heat of Fusion, J/g 380
380
Maximum Temperature: Mechanical, °C 210
180
Melting Completion (Liquidus), °C 630
640
Melting Onset (Solidus), °C 520
480
Specific Heat Capacity, J/kg-K 870
870
Thermal Conductivity, W/m-K 150
140
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
33
Electrical Conductivity: Equal Weight (Specific), % IACS 110
99

Otherwise Unclassified Properties

Base Metal Price, % relative 10
10
Density, g/cm3 2.9
3.0
Embodied Carbon, kg CO2/kg material 8.3
8.2
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1150
1130

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38 to 44
18 to 29
Resilience: Unit (Modulus of Resilience), kJ/m3 610 to 640
1310 to 1730
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
46
Strength to Weight: Axial, points 33 to 34
48 to 52
Strength to Weight: Bending, points 38
48 to 51
Thermal Diffusivity, mm2/s 59
53
Thermal Shock Resistance, points 15 to 16
23 to 25

Alloy Composition

Aluminum (Al), % 91.6 to 94.4
88 to 91.4
Chromium (Cr), % 0 to 0.040
0.18 to 0.28
Copper (Cu), % 0 to 0.050
1.2 to 2.0
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
0 to 0.2
Magnesium (Mg), % 0.7 to 1.5
2.1 to 2.9
Manganese (Mn), % 0 to 0.050
0 to 0.1
Silicon (Si), % 0 to 0.2
0 to 0.15
Titanium (Ti), % 0 to 0.030
0 to 0.1
Zinc (Zn), % 4.8 to 5.8
5.1 to 6.1
Zirconium (Zr), % 0.15 to 0.25
0
Residuals, % 0
0 to 0.15