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EQ21A Magnesium vs. 8021 Aluminum

EQ21A magnesium belongs to the magnesium alloys classification, while 8021 aluminum belongs to the aluminum alloys. There are 28 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 8021 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
70
Elongation at Break, % 2.4
2.3
Fatigue Strength, MPa 110
61
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 17
26
Tensile Strength: Ultimate (UTS), MPa 250
160
Tensile Strength: Yield (Proof), MPa 190
130

Thermal Properties

Latent Heat of Fusion, J/g 340
400
Maximum Temperature: Mechanical, °C 160
170
Melting Completion (Liquidus), °C 640
650
Melting Onset (Solidus), °C 560
640
Specific Heat Capacity, J/kg-K 980
900
Thermal Conductivity, W/m-K 110
220
Thermal Expansion, µm/m-K 27
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
56
Electrical Conductivity: Equal Weight (Specific), % IACS 120
180

Otherwise Unclassified Properties

Base Metal Price, % relative 80
9.0
Density, g/cm3 1.9
2.8
Embodied Carbon, kg CO2/kg material 27
8.1
Embodied Energy, MJ/kg 210
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.6
3.4
Resilience: Unit (Modulus of Resilience), kJ/m3 410
130
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 63
49
Strength to Weight: Axial, points 37
16
Strength to Weight: Bending, points 47
23
Thermal Diffusivity, mm2/s 62
88
Thermal Shock Resistance, points 15
7.0

Alloy Composition


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Aluminum (Al), % 0
98 to 98.8
Copper (Cu), % 0.050 to 0.1
0 to 0.050
Iron (Fe), % 0
1.2 to 1.7
Magnesium (Mg), % 93.9 to 96.8
0
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0
0 to 0.15
Silver (Ag), % 1.3 to 1.7
0
Unspecified Rare Earths, % 1.5 to 3.0
0
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0 to 0.15