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EQ21A Magnesium vs. 2017A Aluminum

EQ21A magnesium belongs to the magnesium alloys classification, while 2017A 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 2017A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
71
Elongation at Break, % 2.4
2.2 to 14
Fatigue Strength, MPa 110
92 to 130
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 17
27
Shear Strength, MPa 150
120 to 270
Tensile Strength: Ultimate (UTS), MPa 250
200 to 460
Tensile Strength: Yield (Proof), MPa 190
110 to 290

Thermal Properties

Latent Heat of Fusion, J/g 340
390
Maximum Temperature: Mechanical, °C 160
220
Melting Completion (Liquidus), °C 640
650
Melting Onset (Solidus), °C 560
510
Specific Heat Capacity, J/kg-K 980
880
Thermal Conductivity, W/m-K 110
150
Thermal Expansion, µm/m-K 27
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
34
Electrical Conductivity: Equal Weight (Specific), % IACS 120
100

Otherwise Unclassified Properties

Base Metal Price, % relative 80
11
Density, g/cm3 1.9
3.0
Embodied Carbon, kg CO2/kg material 27
8.2
Embodied Energy, MJ/kg 210
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.6
6.7 to 53
Resilience: Unit (Modulus of Resilience), kJ/m3 410
90 to 570
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 63
46
Strength to Weight: Axial, points 37
19 to 42
Strength to Weight: Bending, points 47
26 to 44
Thermal Diffusivity, mm2/s 62
56
Thermal Shock Resistance, points 15
8.9 to 20

Alloy Composition

Aluminum (Al), % 0
91.3 to 95.5
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 0.050 to 0.1
3.5 to 4.5
Iron (Fe), % 0
0 to 0.7
Magnesium (Mg), % 93.9 to 96.8
0.4 to 1.0
Manganese (Mn), % 0
0.4 to 1.0
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0
0.2 to 0.8
Silver (Ag), % 1.3 to 1.7
0
Titanium (Ti), % 0
0 to 0.25
Unspecified Rare Earths, % 1.5 to 3.0
0
Zinc (Zn), % 0
0 to 0.25
Zirconium (Zr), % 0.4 to 1.0
0 to 0.25
Residuals, % 0 to 0.3
0 to 0.15