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5457 Aluminum vs. EQ21A Magnesium

5457 aluminum belongs to the aluminum alloys classification, while EQ21A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is 5457 aluminum and the bottom bar is EQ21A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 32 to 55
80
Elastic (Young's, Tensile) Modulus, GPa 68
44
Elongation at Break, % 6.0 to 22
2.4
Fatigue Strength, MPa 55 to 98
110
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
17
Shear Strength, MPa 85 to 130
150
Tensile Strength: Ultimate (UTS), MPa 130 to 210
250
Tensile Strength: Yield (Proof), MPa 50 to 190
190

Thermal Properties

Latent Heat of Fusion, J/g 400
340
Maximum Temperature: Mechanical, °C 180
160
Melting Completion (Liquidus), °C 660
640
Melting Onset (Solidus), °C 630
560
Specific Heat Capacity, J/kg-K 900
980
Thermal Conductivity, W/m-K 180
110
Thermal Expansion, µm/m-K 24
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 46
25
Electrical Conductivity: Equal Weight (Specific), % IACS 150
120

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
80
Density, g/cm3 2.7
1.9
Embodied Carbon, kg CO2/kg material 8.4
27
Embodied Energy, MJ/kg 160
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12 to 23
5.6
Resilience: Unit (Modulus of Resilience), kJ/m3 18 to 250
410
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 50
63
Strength to Weight: Axial, points 13 to 21
37
Strength to Weight: Bending, points 21 to 28
47
Thermal Diffusivity, mm2/s 72
62
Thermal Shock Resistance, points 5.7 to 9.0
15

Alloy Composition

Aluminum (Al), % 97.8 to 99.05
0
Copper (Cu), % 0 to 0.2
0.050 to 0.1
Iron (Fe), % 0 to 0.1
0
Magnesium (Mg), % 0.8 to 1.2
93.9 to 96.8
Manganese (Mn), % 0.15 to 0.45
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.080
0
Silver (Ag), % 0
1.3 to 1.7
Unspecified Rare Earths, % 0
1.5 to 3.0
Vanadium (V), % 0 to 0.050
0
Zinc (Zn), % 0 to 0.050
0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3