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3303 Aluminum vs. 7129 Aluminum

Both 3303 aluminum and 7129 Aluminum are aluminum alloys. They have a moderately high 93% of their average alloy composition in common.

For each property being compared, the top bar is 3303 aluminum and the bottom bar is 7129 Aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
69
Elongation at Break, % 23
9.0 to 9.1
Fatigue Strength, MPa 43
150 to 190
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 69
250 to 260
Tensile Strength: Ultimate (UTS), MPa 110
430
Tensile Strength: Yield (Proof), MPa 39
380 to 390

Thermal Properties

Latent Heat of Fusion, J/g 400
380
Maximum Temperature: Mechanical, °C 180
180
Melting Completion (Liquidus), °C 650
630
Melting Onset (Solidus), °C 620
510
Specific Heat Capacity, J/kg-K 900
880
Thermal Conductivity, W/m-K 170
150
Thermal Expansion, µm/m-K 23
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 43
40
Electrical Conductivity: Equal Weight (Specific), % IACS 140
120

Otherwise Unclassified Properties

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

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20
37 to 38
Resilience: Unit (Modulus of Resilience), kJ/m3 11
1050 to 1090
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 49
47
Strength to Weight: Axial, points 11
41
Strength to Weight: Bending, points 18
43 to 44
Thermal Diffusivity, mm2/s 67
58
Thermal Shock Resistance, points 4.8
19

Alloy Composition


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Aluminum (Al), % 96.6 to 99
91 to 94
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 0.050 to 0.2
0.5 to 0.9
Gallium (Ga), % 0
0 to 0.030
Iron (Fe), % 0 to 0.7
0 to 0.3
Magnesium (Mg), % 0
1.3 to 2.0
Manganese (Mn), % 1.0 to 1.5
0 to 0.1
Silicon (Si), % 0 to 0.6
0 to 0.15
Titanium (Ti), % 0
0 to 0.050
Vanadium (V), % 0
0 to 0.050
Zinc (Zn), % 0 to 0.3
4.2 to 5.2
Residuals, % 0 to 0.15
0 to 0.15