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7129 Aluminum vs. 5042 Aluminum

Both 7129 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 7129 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, % 9.0 to 9.1
1.1 to 3.4
Fatigue Strength, MPa 150 to 190
97 to 120
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
26
Shear Strength, MPa 250 to 260
200
Tensile Strength: Ultimate (UTS), MPa 430
340 to 360
Tensile Strength: Yield (Proof), MPa 380 to 390
270 to 310

Thermal Properties

Latent Heat of Fusion, J/g 380
400
Maximum Temperature: Mechanical, °C 180
180
Melting Completion (Liquidus), °C 630
640
Melting Onset (Solidus), °C 510
570
Specific Heat Capacity, J/kg-K 880
900
Thermal Conductivity, W/m-K 150
130
Thermal Expansion, µm/m-K 24
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
33
Electrical Conductivity: Equal Weight (Specific), % IACS 120
110

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
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 37 to 38
3.6 to 12
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1090
550 to 720
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
50
Strength to Weight: Axial, points 41
35 to 37
Strength to Weight: Bending, points 43 to 44
40 to 42
Thermal Diffusivity, mm2/s 58
53
Thermal Shock Resistance, points 19
15 to 16

Alloy Composition

Aluminum (Al), % 91 to 94
94.2 to 96.8
Chromium (Cr), % 0 to 0.1
0 to 0.1
Copper (Cu), % 0.5 to 0.9
0 to 0.15
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
0 to 0.35
Magnesium (Mg), % 1.3 to 2.0
3.0 to 4.0
Manganese (Mn), % 0 to 0.1
0.2 to 0.5
Silicon (Si), % 0 to 0.15
0 to 0.2
Titanium (Ti), % 0 to 0.050
0 to 0.1
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 4.2 to 5.2
0 to 0.25
Residuals, % 0
0 to 0.15