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EQ21A Magnesium vs. 2024 Aluminum

EQ21A magnesium belongs to the magnesium alloys classification, while 2024 aluminum belongs to the aluminum alloys. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is EQ21A magnesium and the bottom bar is 2024 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
71
Elongation at Break, % 2.4
4.0 to 16
Fatigue Strength, MPa 110
90 to 180
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 17
27
Shear Strength, MPa 150
130 to 320
Tensile Strength: Ultimate (UTS), MPa 250
200 to 540
Tensile Strength: Yield (Proof), MPa 190
100 to 490

Thermal Properties

Latent Heat of Fusion, J/g 340
390
Maximum Temperature: Mechanical, °C 160
200
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 560
500
Specific Heat Capacity, J/kg-K 980
880
Thermal Conductivity, W/m-K 110
120
Thermal Expansion, µm/m-K 27
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
30
Electrical Conductivity: Equal Weight (Specific), % IACS 120
90

Otherwise Unclassified Properties

Base Metal Price, % relative 80
11
Density, g/cm3 1.9
3.0
Embodied Carbon, kg CO2/kg material 27
8.3
Embodied Energy, MJ/kg 210
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.6
20 to 68
Resilience: Unit (Modulus of Resilience), kJ/m3 410
70 to 1680
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 63
46
Strength to Weight: Axial, points 37
18 to 50
Strength to Weight: Bending, points 47
25 to 49
Thermal Diffusivity, mm2/s 62
46
Thermal Shock Resistance, points 15
8.6 to 24

Alloy Composition

Aluminum (Al), % 0
90.7 to 94.7
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 0.050 to 0.1
3.8 to 4.9
Iron (Fe), % 0
0 to 0.5
Magnesium (Mg), % 93.9 to 96.8
1.2 to 1.8
Manganese (Mn), % 0
0.3 to 0.9
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0
0 to 0.5
Silver (Ag), % 1.3 to 1.7
0
Titanium (Ti), % 0
0 to 0.15
Unspecified Rare Earths, % 1.5 to 3.0
0
Zinc (Zn), % 0
0 to 0.25
Zirconium (Zr), % 0.4 to 1.0
0 to 0.2
Residuals, % 0 to 0.3
0 to 0.15