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7475 Aluminum vs. EQ21A Magnesium

7475 aluminum belongs to the aluminum alloys classification, while EQ21A magnesium belongs to the magnesium 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 7475 aluminum and the bottom bar is EQ21A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 10
80
Density, g/cm3 3.0
1.9
Embodied Carbon, kg CO2/kg material 8.2
27
Embodied Energy, MJ/kg 150
210

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 53 to 68
5.6
Resilience: Unit (Modulus of Resilience), kJ/m3 1390 to 1920
410
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
63
Strength to Weight: Axial, points 49 to 55
37
Strength to Weight: Bending, points 48 to 52
47
Thermal Diffusivity, mm2/s 53 to 63
62
Thermal Shock Resistance, points 23 to 26
15

Alloy Composition

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