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8176 Aluminum vs. 7108 Aluminum

Both 8176 aluminum and 7108 aluminum are aluminum alloys. They have a moderately high 94% of their average alloy composition in common.

For each property being compared, the top bar is 8176 aluminum and the bottom bar is 7108 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
69
Elongation at Break, % 15
11
Fatigue Strength, MPa 59
120
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 70
210
Tensile Strength: Ultimate (UTS), MPa 160
350
Tensile Strength: Yield (Proof), MPa 95
290

Thermal Properties

Latent Heat of Fusion, J/g 400
380
Maximum Temperature: Mechanical, °C 170
210
Melting Completion (Liquidus), °C 660
630
Melting Onset (Solidus), °C 650
530
Specific Heat Capacity, J/kg-K 900
880
Thermal Conductivity, W/m-K 230
150
Thermal Expansion, µm/m-K 24
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 61
39
Electrical Conductivity: Equal Weight (Specific), % IACS 200
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 2.7
2.9
Embodied Carbon, kg CO2/kg material 8.2
8.3
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1190
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 21
38
Resilience: Unit (Modulus of Resilience), kJ/m3 66
620
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
47
Strength to Weight: Axial, points 16
34
Strength to Weight: Bending, points 24
38
Thermal Diffusivity, mm2/s 93
59
Thermal Shock Resistance, points 7.0
16

Alloy Composition


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Aluminum (Al), % 98.6 to 99.6
92.4 to 94.7
Copper (Cu), % 0
0 to 0.050
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0.4 to 1.0
0 to 0.1
Magnesium (Mg), % 0
0.7 to 1.4
Manganese (Mn), % 0
0 to 0.050
Silicon (Si), % 0.030 to 0.15
0 to 0.1
Titanium (Ti), % 0
0 to 0.050
Zinc (Zn), % 0 to 0.1
4.5 to 5.5
Zirconium (Zr), % 0
0.12 to 0.25
Residuals, % 0 to 0.15
0 to 0.15