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EN-MC21120 Magnesium vs. 2017 Aluminum

EN-MC21120 magnesium belongs to the magnesium alloys classification, while 2017 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 2017 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
71
Elongation at Break, % 2.2 to 6.7
12 to 18
Fatigue Strength, MPa 84 to 96
90 to 130
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
27
Shear Strength, MPa 110 to 160
130 to 260
Tensile Strength: Ultimate (UTS), MPa 200 to 270
190 to 430
Tensile Strength: Yield (Proof), MPa 130 to 170
76 to 260

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
510
Specific Heat Capacity, J/kg-K 990
880
Thermal Conductivity, W/m-K 76
150
Thermal Expansion, µm/m-K 26
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
38
Electrical Conductivity: Equal Weight (Specific), % IACS 59
110

Otherwise Unclassified Properties

Base Metal Price, % relative 12
10
Density, g/cm3 1.7
3.0
Embodied Carbon, kg CO2/kg material 22
8.0
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 990
1140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.0 to 15
24 to 66
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 320
41 to 470
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
46
Strength to Weight: Axial, points 31 to 43
17 to 40
Strength to Weight: Bending, points 43 to 53
24 to 42
Thermal Diffusivity, mm2/s 44
56
Thermal Shock Resistance, points 11 to 16
7.9 to 18

Alloy Composition

Aluminum (Al), % 8.3 to 9.7
91.6 to 95.5
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 0 to 0.030
3.5 to 4.5
Iron (Fe), % 0 to 0.0050
0 to 0.7
Magnesium (Mg), % 88.6 to 91.3
0.4 to 0.8
Manganese (Mn), % 0.1 to 0.5
0.4 to 1.0
Nickel (Ni), % 0 to 0.0020
0
Silicon (Si), % 0 to 0.2
0.2 to 0.8
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0.35 to 1.0
0 to 0.25
Residuals, % 0
0 to 0.15

Comparable Variants