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EN-MC21120 Magnesium vs. EN AC-45400 Aluminum

EN-MC21120 magnesium belongs to the magnesium alloys classification, while EN AC-45400 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 EN AC-45400 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63 to 75
86
Elastic (Young's, Tensile) Modulus, GPa 46
72
Elongation at Break, % 2.2 to 6.7
6.7
Fatigue Strength, MPa 84 to 96
55
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
27
Tensile Strength: Ultimate (UTS), MPa 200 to 270
260
Tensile Strength: Yield (Proof), MPa 130 to 170
130

Thermal Properties

Latent Heat of Fusion, J/g 350
470
Maximum Temperature: Mechanical, °C 130
170
Melting Completion (Liquidus), °C 600
630
Melting Onset (Solidus), °C 490
560
Specific Heat Capacity, J/kg-K 990
880
Thermal Conductivity, W/m-K 76
140
Thermal Expansion, µm/m-K 26
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
30
Electrical Conductivity: Equal Weight (Specific), % IACS 59
95

Otherwise Unclassified Properties

Base Metal Price, % relative 12
10
Density, g/cm3 1.7
2.8
Embodied Carbon, kg CO2/kg material 22
7.8
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 990
1100

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.0 to 15
14
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 320
110
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
49
Strength to Weight: Axial, points 31 to 43
25
Strength to Weight: Bending, points 43 to 53
32
Thermal Diffusivity, mm2/s 44
54
Thermal Shock Resistance, points 11 to 16
12

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
88.4 to 92.9
Copper (Cu), % 0 to 0.030
2.6 to 3.6
Iron (Fe), % 0 to 0.0050
0 to 0.6
Lead (Pb), % 0
0 to 0.1
Magnesium (Mg), % 88.6 to 91.3
0 to 0.050
Manganese (Mn), % 0.1 to 0.5
0 to 0.55
Nickel (Ni), % 0 to 0.0020
0 to 0.1
Silicon (Si), % 0 to 0.2
4.5 to 6.0
Tin (Sn), % 0
0 to 0.050
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0.35 to 1.0
0 to 0.2
Residuals, % 0 to 0.010
0 to 0.15