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7129 Aluminum vs. EN-MC65120 Magnesium

7129 Aluminum belongs to the aluminum alloys classification, while EN-MC65120 magnesium belongs to the magnesium alloys. 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 EN-MC65120 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
45
Elongation at Break, % 9.0 to 9.1
3.1
Fatigue Strength, MPa 150 to 190
80
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
17
Shear Strength, MPa 250 to 260
92
Tensile Strength: Ultimate (UTS), MPa 430
160
Tensile Strength: Yield (Proof), MPa 380 to 390
110

Thermal Properties

Latent Heat of Fusion, J/g 380
330
Maximum Temperature: Mechanical, °C 180
180
Melting Completion (Liquidus), °C 630
590
Melting Onset (Solidus), °C 510
520
Specific Heat Capacity, J/kg-K 880
970
Thermal Conductivity, W/m-K 150
100
Thermal Expansion, µm/m-K 24
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
25
Electrical Conductivity: Equal Weight (Specific), % IACS 120
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
25
Density, g/cm3 2.9
1.9
Embodied Carbon, kg CO2/kg material 8.3
25
Embodied Energy, MJ/kg 150
190
Embodied Water, L/kg 1150
930

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37 to 38
4.4
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1090
140
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 47
62
Strength to Weight: Axial, points 41
23
Strength to Weight: Bending, points 43 to 44
34
Thermal Diffusivity, mm2/s 58
56
Thermal Shock Resistance, points 19
9.8

Alloy Composition

Aluminum (Al), % 91 to 94
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0.5 to 0.9
0 to 0.030
Gallium (Ga), % 0 to 0.030
0
Iron (Fe), % 0 to 0.3
0 to 0.010
Magnesium (Mg), % 1.3 to 2.0
91.8 to 95.1
Manganese (Mn), % 0 to 0.1
0 to 0.15
Nickel (Ni), % 0
0 to 0.0050
Silicon (Si), % 0 to 0.15
0 to 0.010
Titanium (Ti), % 0 to 0.050
0
Unspecified Rare Earths, % 0
2.5 to 4.0
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 4.2 to 5.2
2.0 to 3.0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.010