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EN-MC21120 Magnesium vs. 2618A Aluminum

EN-MC21120 magnesium belongs to the magnesium alloys classification, while 2618A 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 EN-MC21120 magnesium and the bottom bar is 2618A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
72
Elongation at Break, % 2.2 to 6.7
4.5
Fatigue Strength, MPa 84 to 96
120
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
27
Shear Strength, MPa 110 to 160
260
Tensile Strength: Ultimate (UTS), MPa 200 to 270
440
Tensile Strength: Yield (Proof), MPa 130 to 170
410

Thermal Properties

Latent Heat of Fusion, J/g 350
390
Maximum Temperature: Mechanical, °C 130
230
Melting Completion (Liquidus), °C 600
670
Melting Onset (Solidus), °C 490
560
Specific Heat Capacity, J/kg-K 990
880
Thermal Conductivity, W/m-K 76
150
Thermal Expansion, µm/m-K 26
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
37
Electrical Conductivity: Equal Weight (Specific), % IACS 59
110

Otherwise Unclassified Properties

Base Metal Price, % relative 12
11
Density, g/cm3 1.7
3.0
Embodied Carbon, kg CO2/kg material 22
8.4
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 990
1150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.0 to 15
19
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 320
1180
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
47
Strength to Weight: Axial, points 31 to 43
41
Strength to Weight: Bending, points 43 to 53
44
Thermal Diffusivity, mm2/s 44
59
Thermal Shock Resistance, points 11 to 16
19

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
91.5 to 95.2
Copper (Cu), % 0 to 0.030
1.8 to 2.7
Iron (Fe), % 0 to 0.0050
0.9 to 1.4
Magnesium (Mg), % 88.6 to 91.3
1.2 to 1.8
Manganese (Mn), % 0.1 to 0.5
0 to 0.25
Nickel (Ni), % 0 to 0.0020
0.8 to 1.4
Silicon (Si), % 0 to 0.2
0.15 to 0.25
Titanium (Ti), % 0
0 to 0.2
Zinc (Zn), % 0.35 to 1.0
0 to 0.15
Zirconium (Zr), % 0
0 to 0.25
Residuals, % 0 to 0.010
0 to 0.15