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7108A Aluminum vs. 3303 Aluminum

Both 7108A aluminum and 3303 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 7108A aluminum and the bottom bar is 3303 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
70
Elongation at Break, % 11 to 13
23
Fatigue Strength, MPa 120 to 130
43
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 210
69
Tensile Strength: Ultimate (UTS), MPa 350
110
Tensile Strength: Yield (Proof), MPa 290 to 300
39

Thermal Properties

Latent Heat of Fusion, J/g 380
400
Maximum Temperature: Mechanical, °C 210
180
Melting Completion (Liquidus), °C 630
650
Melting Onset (Solidus), °C 520
620
Specific Heat Capacity, J/kg-K 870
900
Thermal Conductivity, W/m-K 150
170
Thermal Expansion, µm/m-K 24
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
43
Electrical Conductivity: Equal Weight (Specific), % IACS 110
140

Otherwise Unclassified Properties

Base Metal Price, % relative 10
9.5
Density, g/cm3 2.9
2.8
Embodied Carbon, kg CO2/kg material 8.3
8.1
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1150
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38 to 44
20
Resilience: Unit (Modulus of Resilience), kJ/m3 610 to 640
11
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
49
Strength to Weight: Axial, points 33 to 34
11
Strength to Weight: Bending, points 38
18
Thermal Diffusivity, mm2/s 59
67
Thermal Shock Resistance, points 15 to 16
4.8

Alloy Composition


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Aluminum (Al), % 91.6 to 94.4
96.6 to 99
Chromium (Cr), % 0 to 0.040
0
Copper (Cu), % 0 to 0.050
0.050 to 0.2
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
0 to 0.7
Magnesium (Mg), % 0.7 to 1.5
0
Manganese (Mn), % 0 to 0.050
1.0 to 1.5
Silicon (Si), % 0 to 0.2
0 to 0.6
Titanium (Ti), % 0 to 0.030
0
Zinc (Zn), % 4.8 to 5.8
0 to 0.3
Zirconium (Zr), % 0.15 to 0.25
0
Residuals, % 0 to 0.15
0 to 0.15