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WE43B Magnesium vs. 7049A Aluminum

WE43B magnesium belongs to the magnesium alloys classification, while 7049A aluminum belongs to the aluminum 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 WE43B magnesium and the bottom bar is 7049A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
71
Elongation at Break, % 2.2
5.0 to 5.7
Fatigue Strength, MPa 110
180
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 17
27
Shear Strength, MPa 140
340 to 350
Tensile Strength: Ultimate (UTS), MPa 250
580 to 590
Tensile Strength: Yield (Proof), MPa 200
500 to 530

Thermal Properties

Latent Heat of Fusion, J/g 330
370
Maximum Temperature: Mechanical, °C 180
200
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 550
430
Specific Heat Capacity, J/kg-K 960
850
Thermal Conductivity, W/m-K 51
130
Thermal Expansion, µm/m-K 27
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
40
Electrical Conductivity: Equal Weight (Specific), % IACS 53
120

Otherwise Unclassified Properties

Base Metal Price, % relative 34
10
Density, g/cm3 1.9
3.1
Embodied Carbon, kg CO2/kg material 28
8.2
Embodied Energy, MJ/kg 250
150
Embodied Water, L/kg 910
1100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.2
28 to 32
Resilience: Unit (Modulus of Resilience), kJ/m3 430
1800 to 1990
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 61
44
Strength to Weight: Axial, points 36
52 to 53
Strength to Weight: Bending, points 46
50 to 51
Thermal Diffusivity, mm2/s 28
50
Thermal Shock Resistance, points 15
25

Alloy Composition


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Aluminum (Al), % 0
84.6 to 89.5
Chromium (Cr), % 0
0.050 to 0.25
Copper (Cu), % 0 to 0.020
1.2 to 1.9
Iron (Fe), % 0 to 0.010
0 to 0.5
Lithium (Li), % 0 to 0.2
0
Magnesium (Mg), % 89.8 to 93.5
2.1 to 3.1
Manganese (Mn), % 0 to 0.030
0 to 0.5
Nickel (Ni), % 0 to 0.0050
0
Silicon (Si), % 0
0 to 0.4
Titanium (Ti), % 0
0 to 0.25
Unspecified Rare Earths, % 2.4 to 4.4
0
Yttrium (Y), % 3.7 to 4.3
0
Zinc (Zn), % 0 to 0.2
7.2 to 8.4
Zirconium (Zr), % 0.4 to 1.0
0 to 0.25
Residuals, % 0
0 to 0.15