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7108A Aluminum vs. 2618A Aluminum

Both 7108A aluminum and 2618A 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 2618A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
72
Elongation at Break, % 11 to 13
4.5
Fatigue Strength, MPa 120 to 130
120
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
27
Shear Strength, MPa 210
260
Tensile Strength: Ultimate (UTS), MPa 350
440
Tensile Strength: Yield (Proof), MPa 290 to 300
410

Thermal Properties

Latent Heat of Fusion, J/g 380
390
Maximum Temperature: Mechanical, °C 210
230
Melting Completion (Liquidus), °C 630
670
Melting Onset (Solidus), °C 520
560
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
37
Electrical Conductivity: Equal Weight (Specific), % IACS 110
110

Otherwise Unclassified Properties

Base Metal Price, % relative 10
11
Density, g/cm3 2.9
3.0
Embodied Carbon, kg CO2/kg material 8.3
8.4
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1150
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38 to 44
19
Resilience: Unit (Modulus of Resilience), kJ/m3 610 to 640
1180
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
47
Strength to Weight: Axial, points 33 to 34
41
Strength to Weight: Bending, points 38
44
Thermal Diffusivity, mm2/s 59
59
Thermal Shock Resistance, points 15 to 16
19

Alloy Composition


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Aluminum (Al), % 91.6 to 94.4
91.5 to 95.2
Chromium (Cr), % 0 to 0.040
0
Copper (Cu), % 0 to 0.050
1.8 to 2.7
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
0.9 to 1.4
Magnesium (Mg), % 0.7 to 1.5
1.2 to 1.8
Manganese (Mn), % 0 to 0.050
0 to 0.25
Nickel (Ni), % 0
0.8 to 1.4
Silicon (Si), % 0 to 0.2
0.15 to 0.25
Titanium (Ti), % 0 to 0.030
0 to 0.2
Zinc (Zn), % 4.8 to 5.8
0 to 0.15
Zirconium (Zr), % 0.15 to 0.25
0 to 0.25
Residuals, % 0 to 0.15
0 to 0.15