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EQ21A Magnesium vs. 8090 Aluminum

EQ21A magnesium belongs to the magnesium alloys classification, while 8090 aluminum belongs to the aluminum 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 EQ21A magnesium and the bottom bar is 8090 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
67
Elongation at Break, % 2.4
3.5 to 13
Fatigue Strength, MPa 110
91 to 140
Fracture Toughness, MPa-m1/2 16
23 to 130
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 17
25
Tensile Strength: Ultimate (UTS), MPa 250
340 to 490
Tensile Strength: Yield (Proof), MPa 190
210 to 420

Thermal Properties

Latent Heat of Fusion, J/g 340
400
Maximum Temperature: Mechanical, °C 160
190
Melting Completion (Liquidus), °C 640
660
Melting Onset (Solidus), °C 560
600
Specific Heat Capacity, J/kg-K 980
960
Thermal Conductivity, W/m-K 110
95 to 160
Thermal Expansion, µm/m-K 27
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
20
Electrical Conductivity: Equal Weight (Specific), % IACS 120
66

Otherwise Unclassified Properties

Base Metal Price, % relative 80
18
Density, g/cm3 1.9
2.7
Embodied Carbon, kg CO2/kg material 27
8.6
Embodied Energy, MJ/kg 210
170

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.6
16 to 41
Resilience: Unit (Modulus of Resilience), kJ/m3 410
340 to 1330
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 63
50
Strength to Weight: Axial, points 37
34 to 49
Strength to Weight: Bending, points 47
39 to 50
Thermal Diffusivity, mm2/s 62
36 to 60
Thermal Shock Resistance, points 15
15 to 22

Alloy Composition


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Aluminum (Al), % 0
93 to 98.4
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 0.050 to 0.1
1.0 to 1.6
Iron (Fe), % 0
0 to 0.3
Lithium (Li), % 0
2.2 to 2.7
Magnesium (Mg), % 93.9 to 96.8
0.6 to 1.3
Manganese (Mn), % 0
0 to 0.1
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0
0 to 0.2
Silver (Ag), % 1.3 to 1.7
0
Titanium (Ti), % 0
0 to 0.1
Unspecified Rare Earths, % 1.5 to 3.0
0
Zinc (Zn), % 0
0 to 0.25
Zirconium (Zr), % 0.4 to 1.0
0.040 to 0.16
Residuals, % 0 to 0.3
0 to 0.15