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5449 Aluminum vs. 7108A Aluminum

Both 5449 aluminum and 7108A 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 5449 aluminum and the bottom bar is 7108A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
69
Elongation at Break, % 4.0 to 17
11 to 13
Fatigue Strength, MPa 78 to 120
120 to 130
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 130 to 190
210
Tensile Strength: Ultimate (UTS), MPa 210 to 330
350
Tensile Strength: Yield (Proof), MPa 91 to 260
290 to 300

Thermal Properties

Latent Heat of Fusion, J/g 400
380
Maximum Temperature: Mechanical, °C 190
210
Melting Completion (Liquidus), °C 650
630
Melting Onset (Solidus), °C 590
520
Specific Heat Capacity, J/kg-K 900
870
Thermal Conductivity, W/m-K 140
150
Thermal Expansion, µm/m-K 23
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
36
Electrical Conductivity: Equal Weight (Specific), % IACS 110
110

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
10
Density, g/cm3 2.8
2.9
Embodied Carbon, kg CO2/kg material 8.5
8.3
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1180
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12 to 29
38 to 44
Resilience: Unit (Modulus of Resilience), kJ/m3 60 to 480
610 to 640
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
47
Strength to Weight: Axial, points 22 to 33
33 to 34
Strength to Weight: Bending, points 29 to 39
38
Thermal Diffusivity, mm2/s 56
59
Thermal Shock Resistance, points 9.4 to 15
15 to 16

Alloy Composition

Aluminum (Al), % 94.1 to 97.8
91.6 to 94.4
Chromium (Cr), % 0 to 0.3
0 to 0.040
Copper (Cu), % 0 to 0.3
0 to 0.050
Gallium (Ga), % 0
0 to 0.030
Iron (Fe), % 0 to 0.7
0 to 0.3
Magnesium (Mg), % 1.6 to 2.6
0.7 to 1.5
Manganese (Mn), % 0.6 to 1.1
0 to 0.050
Silicon (Si), % 0 to 0.4
0 to 0.2
Titanium (Ti), % 0 to 0.1
0 to 0.030
Zinc (Zn), % 0 to 0.3
4.8 to 5.8
Zirconium (Zr), % 0
0.15 to 0.25
Residuals, % 0
0 to 0.15