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7129 Aluminum vs. 4045 Aluminum

Both 7129 Aluminum and 4045 aluminum are aluminum alloys. They have 90% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is 7129 Aluminum and the bottom bar is 4045 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
71
Elongation at Break, % 9.0 to 9.1
2.3
Fatigue Strength, MPa 150 to 190
45
Poisson's Ratio 0.33
0.33
Shear Modulus, GPa 26
27
Shear Strength, MPa 250 to 260
69
Tensile Strength: Ultimate (UTS), MPa 430
120
Tensile Strength: Yield (Proof), MPa 380 to 390
64

Thermal Properties

Latent Heat of Fusion, J/g 380
540
Maximum Temperature: Mechanical, °C 180
160
Melting Completion (Liquidus), °C 630
600
Melting Onset (Solidus), °C 510
580
Specific Heat Capacity, J/kg-K 880
900
Thermal Conductivity, W/m-K 150
170
Thermal Expansion, µm/m-K 24
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
45
Electrical Conductivity: Equal Weight (Specific), % IACS 120
160

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
9.5
Density, g/cm3 2.9
2.6
Embodied Carbon, kg CO2/kg material 8.3
7.8
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1150
1070

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37 to 38
2.4
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1090
29
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 47
54
Strength to Weight: Axial, points 41
13
Strength to Weight: Bending, points 43 to 44
21
Thermal Diffusivity, mm2/s 58
74
Thermal Shock Resistance, points 19
5.7

Alloy Composition

Aluminum (Al), % 91 to 94
87.4 to 91
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0.5 to 0.9
0 to 0.3
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
0 to 0.8
Magnesium (Mg), % 1.3 to 2.0
0 to 0.050
Manganese (Mn), % 0 to 0.1
0 to 0.050
Silicon (Si), % 0 to 0.15
9.0 to 11
Titanium (Ti), % 0 to 0.050
0 to 0.2
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 4.2 to 5.2
0 to 0.1
Residuals, % 0
0 to 0.15