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6066 Aluminum vs. EQ21A Magnesium

6066 aluminum belongs to the aluminum alloys classification, while EQ21A magnesium belongs to the magnesium alloys. There are 29 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is 6066 aluminum and the bottom bar is EQ21A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
44
Elongation at Break, % 7.8 to 17
2.4
Fatigue Strength, MPa 94 to 130
110
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
17
Shear Strength, MPa 95 to 240
150
Tensile Strength: Ultimate (UTS), MPa 160 to 400
250
Tensile Strength: Yield (Proof), MPa 93 to 360
190

Thermal Properties

Latent Heat of Fusion, J/g 410
340
Maximum Temperature: Mechanical, °C 170
160
Melting Completion (Liquidus), °C 650
640
Melting Onset (Solidus), °C 560
560
Specific Heat Capacity, J/kg-K 890
980
Thermal Conductivity, W/m-K 150
110
Thermal Expansion, µm/m-K 23
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
25
Electrical Conductivity: Equal Weight (Specific), % IACS 130
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
80
Density, g/cm3 2.8
1.9
Embodied Carbon, kg CO2/kg material 8.3
27
Embodied Energy, MJ/kg 150
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 23 to 52
5.6
Resilience: Unit (Modulus of Resilience), kJ/m3 61 to 920
410
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 49
63
Strength to Weight: Axial, points 16 to 39
37
Strength to Weight: Bending, points 23 to 43
47
Thermal Diffusivity, mm2/s 61
62
Thermal Shock Resistance, points 6.9 to 17
15

Alloy Composition

Aluminum (Al), % 93 to 97
0
Chromium (Cr), % 0 to 0.4
0
Copper (Cu), % 0.7 to 1.2
0.050 to 0.1
Iron (Fe), % 0 to 0.5
0
Magnesium (Mg), % 0.8 to 1.4
93.9 to 96.8
Manganese (Mn), % 0.6 to 1.1
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0.9 to 1.8
0
Silver (Ag), % 0
1.3 to 1.7
Titanium (Ti), % 0 to 0.2
0
Unspecified Rare Earths, % 0
1.5 to 3.0
Zinc (Zn), % 0 to 0.25
0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3