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EQ21A Magnesium vs. 7475 Aluminum

EQ21A magnesium belongs to the magnesium alloys classification, while 7475 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 7475 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 44
70
Elongation at Break, % 2.4
10 to 12
Fatigue Strength, MPa 110
190 to 210
Poisson's Ratio 0.29
0.32
Shear Modulus, GPa 17
26
Shear Strength, MPa 150
320 to 350
Tensile Strength: Ultimate (UTS), MPa 250
530 to 590
Tensile Strength: Yield (Proof), MPa 190
440 to 520

Thermal Properties

Latent Heat of Fusion, J/g 340
380
Maximum Temperature: Mechanical, °C 160
180
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 560
480
Specific Heat Capacity, J/kg-K 980
870
Thermal Conductivity, W/m-K 110
140 to 160
Thermal Expansion, µm/m-K 27
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 25
33 to 42
Electrical Conductivity: Equal Weight (Specific), % IACS 120
98 to 120

Otherwise Unclassified Properties

Base Metal Price, % relative 80
10
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
53 to 68
Resilience: Unit (Modulus of Resilience), kJ/m3 410
1390 to 1920
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 63
46
Strength to Weight: Axial, points 37
49 to 55
Strength to Weight: Bending, points 47
48 to 52
Thermal Diffusivity, mm2/s 62
53 to 63
Thermal Shock Resistance, points 15
23 to 26

Alloy Composition


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Aluminum (Al), % 0
88.6 to 91.6
Chromium (Cr), % 0
0.18 to 0.25
Copper (Cu), % 0.050 to 0.1
1.2 to 1.9
Iron (Fe), % 0
0 to 0.12
Magnesium (Mg), % 93.9 to 96.8
1.9 to 2.6
Manganese (Mn), % 0
0 to 0.060
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0
0 to 0.1
Silver (Ag), % 1.3 to 1.7
0
Titanium (Ti), % 0
0 to 0.060
Unspecified Rare Earths, % 1.5 to 3.0
0
Zinc (Zn), % 0
5.1 to 6.2
Zirconium (Zr), % 0.4 to 1.0
0
Residuals, % 0 to 0.3
0 to 0.15