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5051A Aluminum vs. EQ21A Magnesium

5051A 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 5051A aluminum and the bottom bar is EQ21A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
44
Elongation at Break, % 18 to 21
2.4
Fatigue Strength, MPa 51 to 61
110
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
17
Shear Strength, MPa 110
150
Tensile Strength: Ultimate (UTS), MPa 170
250
Tensile Strength: Yield (Proof), MPa 56
190

Thermal Properties

Latent Heat of Fusion, J/g 400
340
Maximum Temperature: Mechanical, °C 190
160
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 610
560
Specific Heat Capacity, J/kg-K 900
980
Thermal Conductivity, W/m-K 150
110
Thermal Expansion, µm/m-K 23
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
25
Electrical Conductivity: Equal Weight (Specific), % IACS 130
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
80
Density, g/cm3 2.7
1.9
Embodied Carbon, kg CO2/kg material 8.5
27
Embodied Energy, MJ/kg 150
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 24 to 27
5.6
Resilience: Unit (Modulus of Resilience), kJ/m3 23
410
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
63
Strength to Weight: Axial, points 17 to 18
37
Strength to Weight: Bending, points 25
47
Thermal Diffusivity, mm2/s 63
62
Thermal Shock Resistance, points 7.6
15

Alloy Composition

Aluminum (Al), % 96.1 to 98.6
0
Chromium (Cr), % 0 to 0.3
0
Copper (Cu), % 0 to 0.050
0.050 to 0.1
Iron (Fe), % 0 to 0.45
0
Magnesium (Mg), % 1.4 to 2.1
93.9 to 96.8
Manganese (Mn), % 0 to 0.25
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.3
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 0.2
0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3