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EQ21A Magnesium vs. 5059 Aluminum

EQ21A magnesium belongs to the magnesium alloys classification, while 5059 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 5059 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
69
Elongation at Break, % 2.4
11 to 25
Fatigue Strength, MPa 110
170 to 240
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 17
26
Shear Strength, MPa 150
220 to 250
Tensile Strength: Ultimate (UTS), MPa 250
350 to 410
Tensile Strength: Yield (Proof), MPa 190
170 to 300

Thermal Properties

Latent Heat of Fusion, J/g 340
390
Maximum Temperature: Mechanical, °C 160
210
Melting Completion (Liquidus), °C 640
650
Melting Onset (Solidus), °C 560
510
Specific Heat Capacity, J/kg-K 980
900
Thermal Conductivity, W/m-K 110
110
Thermal Expansion, µm/m-K 27
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
29
Electrical Conductivity: Equal Weight (Specific), % IACS 120
95

Otherwise Unclassified Properties

Base Metal Price, % relative 80
9.5
Density, g/cm3 1.9
2.7
Embodied Carbon, kg CO2/kg material 27
9.1
Embodied Energy, MJ/kg 210
160

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.6
42 to 75
Resilience: Unit (Modulus of Resilience), kJ/m3 410
220 to 650
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 63
50
Strength to Weight: Axial, points 37
36 to 42
Strength to Weight: Bending, points 47
41 to 45
Thermal Diffusivity, mm2/s 62
44
Thermal Shock Resistance, points 15
16 to 18

Alloy Composition

Aluminum (Al), % 0
89.9 to 94
Chromium (Cr), % 0
0 to 0.25
Copper (Cu), % 0.050 to 0.1
0 to 0.25
Iron (Fe), % 0
0 to 0.5
Magnesium (Mg), % 93.9 to 96.8
5.0 to 6.0
Manganese (Mn), % 0
0.6 to 1.2
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0
0 to 0.45
Silver (Ag), % 1.3 to 1.7
0
Titanium (Ti), % 0
0 to 0.2
Unspecified Rare Earths, % 1.5 to 3.0
0
Zinc (Zn), % 0
0.4 to 0.9
Zirconium (Zr), % 0.4 to 1.0
0.050 to 0.25
Residuals, % 0
0 to 0.15