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7108A Aluminum vs. 5042 Aluminum

Both 7108A aluminum and 5042 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 5042 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
68
Elongation at Break, % 11 to 13
1.1 to 3.4
Fatigue Strength, MPa 120 to 130
97 to 120
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 210
200
Tensile Strength: Ultimate (UTS), MPa 350
340 to 360
Tensile Strength: Yield (Proof), MPa 290 to 300
270 to 310

Thermal Properties

Latent Heat of Fusion, J/g 380
400
Maximum Temperature: Mechanical, °C 210
180
Melting Completion (Liquidus), °C 630
640
Melting Onset (Solidus), °C 520
570
Specific Heat Capacity, J/kg-K 870
900
Thermal Conductivity, W/m-K 150
130
Thermal Expansion, µm/m-K 24
24

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 10
9.5
Density, g/cm3 2.9
2.7
Embodied Carbon, kg CO2/kg material 8.3
8.8
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1150
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38 to 44
3.6 to 12
Resilience: Unit (Modulus of Resilience), kJ/m3 610 to 640
550 to 720
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
50
Strength to Weight: Axial, points 33 to 34
35 to 37
Strength to Weight: Bending, points 38
40 to 42
Thermal Diffusivity, mm2/s 59
53
Thermal Shock Resistance, points 15 to 16
15 to 16

Alloy Composition


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Aluminum (Al), % 91.6 to 94.4
94.2 to 96.8
Chromium (Cr), % 0 to 0.040
0 to 0.1
Copper (Cu), % 0 to 0.050
0 to 0.15
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
0 to 0.35
Magnesium (Mg), % 0.7 to 1.5
3.0 to 4.0
Manganese (Mn), % 0 to 0.050
0.2 to 0.5
Silicon (Si), % 0 to 0.2
0 to 0.2
Titanium (Ti), % 0 to 0.030
0 to 0.1
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