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EN-MC21120 Magnesium vs. 5456 Aluminum

EN-MC21120 magnesium belongs to the magnesium alloys classification, while 5456 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 EN-MC21120 magnesium and the bottom bar is 5456 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
68
Elongation at Break, % 2.2 to 6.7
11 to 18
Fatigue Strength, MPa 84 to 96
130 to 210
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
26
Shear Strength, MPa 110 to 160
190 to 210
Tensile Strength: Ultimate (UTS), MPa 200 to 270
320 to 340
Tensile Strength: Yield (Proof), MPa 130 to 170
150 to 250

Thermal Properties

Latent Heat of Fusion, J/g 350
390
Maximum Temperature: Mechanical, °C 130
190
Melting Completion (Liquidus), °C 600
640
Melting Onset (Solidus), °C 490
570
Specific Heat Capacity, J/kg-K 990
900
Thermal Conductivity, W/m-K 76
120
Thermal Expansion, µm/m-K 26
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
29
Electrical Conductivity: Equal Weight (Specific), % IACS 59
97

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.5
Density, g/cm3 1.7
2.7
Embodied Carbon, kg CO2/kg material 22
9.0
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 990
1170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.0 to 15
33 to 46
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 320
170 to 470
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
50
Strength to Weight: Axial, points 31 to 43
33 to 35
Strength to Weight: Bending, points 43 to 53
38 to 40
Thermal Diffusivity, mm2/s 44
48
Thermal Shock Resistance, points 11 to 16
14 to 15

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
92 to 94.8
Chromium (Cr), % 0
0.050 to 0.2
Copper (Cu), % 0 to 0.030
0 to 0.1
Iron (Fe), % 0 to 0.0050
0 to 0.4
Magnesium (Mg), % 88.6 to 91.3
4.7 to 5.5
Manganese (Mn), % 0.1 to 0.5
0.5 to 1.0
Nickel (Ni), % 0 to 0.0020
0
Silicon (Si), % 0 to 0.2
0 to 0.25
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0.35 to 1.0
0 to 0.25
Residuals, % 0 to 0.010
0 to 0.15