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EN-MC21120 Magnesium vs. 7049A Aluminum

EN-MC21120 magnesium belongs to the magnesium alloys classification, while 7049A 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 7049A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
71
Elongation at Break, % 2.2 to 6.7
5.0 to 5.7
Fatigue Strength, MPa 84 to 96
180
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 18
27
Shear Strength, MPa 110 to 160
340 to 350
Tensile Strength: Ultimate (UTS), MPa 200 to 270
580 to 590
Tensile Strength: Yield (Proof), MPa 130 to 170
500 to 530

Thermal Properties

Latent Heat of Fusion, J/g 350
370
Maximum Temperature: Mechanical, °C 130
200
Melting Completion (Liquidus), °C 600
640
Melting Onset (Solidus), °C 490
430
Specific Heat Capacity, J/kg-K 990
850
Thermal Conductivity, W/m-K 76
130
Thermal Expansion, µm/m-K 26
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
40
Electrical Conductivity: Equal Weight (Specific), % IACS 59
120

Otherwise Unclassified Properties

Base Metal Price, % relative 12
10
Density, g/cm3 1.7
3.1
Embodied Carbon, kg CO2/kg material 22
8.2
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
28 to 32
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 320
1800 to 1990
Stiffness to Weight: Axial, points 15
13
Stiffness to Weight: Bending, points 69
44
Strength to Weight: Axial, points 31 to 43
52 to 53
Strength to Weight: Bending, points 43 to 53
50 to 51
Thermal Diffusivity, mm2/s 44
50
Thermal Shock Resistance, points 11 to 16
25

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
84.6 to 89.5
Chromium (Cr), % 0
0.050 to 0.25
Copper (Cu), % 0 to 0.030
1.2 to 1.9
Iron (Fe), % 0 to 0.0050
0 to 0.5
Magnesium (Mg), % 88.6 to 91.3
2.1 to 3.1
Manganese (Mn), % 0.1 to 0.5
0 to 0.5
Nickel (Ni), % 0 to 0.0020
0
Silicon (Si), % 0 to 0.2
0 to 0.4
Titanium (Ti), % 0
0 to 0.25
Zinc (Zn), % 0.35 to 1.0
7.2 to 8.4
Zirconium (Zr), % 0
0 to 0.25
Residuals, % 0 to 0.010
0 to 0.15

Comparable Variants