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WE43B Magnesium vs. 705.0 Aluminum

WE43B magnesium belongs to the magnesium alloys classification, while 705.0 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is WE43B magnesium and the bottom bar is 705.0 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
69
Elongation at Break, % 2.2
8.4 to 10
Fatigue Strength, MPa 110
63 to 98
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 17
26
Tensile Strength: Ultimate (UTS), MPa 250
240 to 260
Tensile Strength: Yield (Proof), MPa 200
130

Thermal Properties

Latent Heat of Fusion, J/g 330
390
Maximum Temperature: Mechanical, °C 180
180
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 550
610
Solidification (Pattern Maker's) Shrinkage, % 1.6
1.6
Specific Heat Capacity, J/kg-K 960
890
Thermal Conductivity, W/m-K 51
140
Thermal Expansion, µm/m-K 27
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
34
Electrical Conductivity: Equal Weight (Specific), % IACS 53
110

Otherwise Unclassified Properties

Base Metal Price, % relative 34
9.5
Density, g/cm3 1.9
2.8
Embodied Carbon, kg CO2/kg material 28
8.4
Embodied Energy, MJ/kg 250
150
Embodied Water, L/kg 910
1170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.2
18 to 20
Resilience: Unit (Modulus of Resilience), kJ/m3 430
120 to 130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 61
49
Strength to Weight: Axial, points 36
24 to 26
Strength to Weight: Bending, points 46
31 to 32
Thermal Diffusivity, mm2/s 28
55
Thermal Shock Resistance, points 15
11

Alloy Composition


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Aluminum (Al), % 0
92.3 to 98.6
Chromium (Cr), % 0
0 to 0.4
Copper (Cu), % 0 to 0.020
0 to 0.2
Iron (Fe), % 0 to 0.010
0 to 0.8
Lithium (Li), % 0 to 0.2
0
Magnesium (Mg), % 89.8 to 93.5
1.4 to 1.8
Manganese (Mn), % 0 to 0.030
0 to 0.6
Nickel (Ni), % 0 to 0.0050
0
Silicon (Si), % 0
0 to 0.2
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
0 to 3.3
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0
0 to 0.15