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7129 Aluminum vs. ISO-WD32260 Magnesium

7129 Aluminum belongs to the aluminum alloys classification, while ISO-WD32260 magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 7129 Aluminum and the bottom bar is ISO-WD32260 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
46
Elongation at Break, % 9.0 to 9.1
4.5 to 6.0
Fatigue Strength, MPa 150 to 190
150 to 190
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 250 to 260
190 to 200
Tensile Strength: Ultimate (UTS), MPa 430
330 to 340
Tensile Strength: Yield (Proof), MPa 380 to 390
230 to 250

Thermal Properties

Latent Heat of Fusion, J/g 380
330
Maximum Temperature: Mechanical, °C 180
120
Melting Completion (Liquidus), °C 630
600
Melting Onset (Solidus), °C 510
520
Specific Heat Capacity, J/kg-K 880
970
Thermal Conductivity, W/m-K 150
110
Thermal Expansion, µm/m-K 24
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
28
Electrical Conductivity: Equal Weight (Specific), % IACS 120
140

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.9
1.9
Embodied Carbon, kg CO2/kg material 8.3
23
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1150
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37 to 38
14 to 19
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1090
560 to 700
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
63
Strength to Weight: Axial, points 41
48 to 51
Strength to Weight: Bending, points 43 to 44
56 to 58
Thermal Diffusivity, mm2/s 58
63
Thermal Shock Resistance, points 19
19 to 20

Alloy Composition

Aluminum (Al), % 91 to 94
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0.5 to 0.9
0
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
0
Magnesium (Mg), % 1.3 to 2.0
92.7 to 94.8
Manganese (Mn), % 0 to 0.1
0
Silicon (Si), % 0 to 0.15
0
Titanium (Ti), % 0 to 0.050
0
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 4.2 to 5.2
4.8 to 6.2
Zirconium (Zr), % 0
0.45 to 0.8
Residuals, % 0
0 to 0.3

Comparable Variants