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7108A Aluminum vs. 2124 Aluminum

Both 7108A aluminum and 2124 aluminum are aluminum alloys. They have a moderately high 95% of their average alloy composition in common.

For each property being compared, the top bar is 7108A aluminum and the bottom bar is 2124 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
71
Elongation at Break, % 11 to 13
5.7
Fatigue Strength, MPa 120 to 130
130
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
27
Shear Strength, MPa 210
280
Tensile Strength: Ultimate (UTS), MPa 350
490
Tensile Strength: Yield (Proof), MPa 290 to 300
430

Thermal Properties

Latent Heat of Fusion, J/g 380
390
Maximum Temperature: Mechanical, °C 210
190
Melting Completion (Liquidus), °C 630
640
Melting Onset (Solidus), °C 520
500
Specific Heat Capacity, J/kg-K 870
880
Thermal Conductivity, W/m-K 150
150
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
38
Electrical Conductivity: Equal Weight (Specific), % IACS 110
110

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
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38 to 44
27
Resilience: Unit (Modulus of Resilience), kJ/m3 610 to 640
1290
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
46
Strength to Weight: Axial, points 33 to 34
45
Strength to Weight: Bending, points 38
46
Thermal Diffusivity, mm2/s 59
58
Thermal Shock Resistance, points 15 to 16
21

Alloy Composition


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Aluminum (Al), % 91.6 to 94.4
91.3 to 94.7
Chromium (Cr), % 0 to 0.040
0 to 0.1
Copper (Cu), % 0 to 0.050
3.8 to 4.9
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
0 to 0.3
Magnesium (Mg), % 0.7 to 1.5
1.2 to 1.8
Manganese (Mn), % 0 to 0.050
0.3 to 0.9
Silicon (Si), % 0 to 0.2
0 to 0.2
Titanium (Ti), % 0 to 0.030
0 to 0.15
Zinc (Zn), % 4.8 to 5.8
0 to 0.25
Zirconium (Zr), % 0.15 to 0.25
0
Residuals, % 0 to 0.15
0 to 0.15