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5082 Aluminum vs. EQ21A Magnesium

5082 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 5082 aluminum and the bottom bar is EQ21A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67
44
Elongation at Break, % 1.1
2.4
Fatigue Strength, MPa 110 to 130
110
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 25
17
Shear Strength, MPa 210 to 230
150
Tensile Strength: Ultimate (UTS), MPa 380 to 400
250
Tensile Strength: Yield (Proof), MPa 300 to 340
190

Thermal Properties

Latent Heat of Fusion, J/g 400
340
Maximum Temperature: Mechanical, °C 180
160
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 560
560
Specific Heat Capacity, J/kg-K 910
980
Thermal Conductivity, W/m-K 130
110
Thermal Expansion, µm/m-K 24
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 32
25
Electrical Conductivity: Equal Weight (Specific), % IACS 110
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
80
Density, g/cm3 2.7
1.9
Embodied Carbon, kg CO2/kg material 8.9
27
Embodied Energy, MJ/kg 150
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 4.3
5.6
Resilience: Unit (Modulus of Resilience), kJ/m3 670 to 870
410
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 51
63
Strength to Weight: Axial, points 39 to 41
37
Strength to Weight: Bending, points 43 to 45
47
Thermal Diffusivity, mm2/s 54
62
Thermal Shock Resistance, points 17 to 18
15

Alloy Composition

Aluminum (Al), % 93.5 to 96
0
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 0 to 0.15
0.050 to 0.1
Iron (Fe), % 0 to 0.35
0
Magnesium (Mg), % 4.0 to 5.0
93.9 to 96.8
Manganese (Mn), % 0 to 0.15
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.2
0
Silver (Ag), % 0
1.3 to 1.7
Titanium (Ti), % 0 to 0.1
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