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7175 Aluminum vs. QE22A Magnesium

7175 aluminum belongs to the aluminum alloys classification, while QE22A magnesium belongs to the magnesium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is 7175 aluminum and the bottom bar is QE22A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
44
Elongation at Break, % 3.8 to 5.9
2.4
Fatigue Strength, MPa 150 to 180
110
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 26
17
Shear Strength, MPa 290 to 330
150
Tensile Strength: Ultimate (UTS), MPa 520 to 570
250
Tensile Strength: Yield (Proof), MPa 430 to 490
190

Thermal Properties

Latent Heat of Fusion, J/g 380
340
Maximum Temperature: Mechanical, °C 180
250
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 480
570
Specific Heat Capacity, J/kg-K 870
970
Thermal Conductivity, W/m-K 140
110
Thermal Expansion, µm/m-K 23
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
25
Electrical Conductivity: Equal Weight (Specific), % IACS 99
120

Otherwise Unclassified Properties

Density, g/cm3 3.0
2.0
Embodied Carbon, kg CO2/kg material 8.2
27
Embodied Energy, MJ/kg 150
220

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 18 to 29
5.5
Resilience: Unit (Modulus of Resilience), kJ/m3 1310 to 1730
400
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 46
60
Strength to Weight: Axial, points 48 to 52
36
Strength to Weight: Bending, points 48 to 51
46
Thermal Diffusivity, mm2/s 53
59
Thermal Shock Resistance, points 23 to 25
15

Alloy Composition

Aluminum (Al), % 88 to 91.4
0
Chromium (Cr), % 0.18 to 0.28
0
Copper (Cu), % 1.2 to 2.0
0 to 0.1
Iron (Fe), % 0 to 0.2
0
Magnesium (Mg), % 2.1 to 2.9
93.1 to 95.8
Manganese (Mn), % 0 to 0.1
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.15
0
Silver (Ag), % 0
2.0 to 3.0
Titanium (Ti), % 0 to 0.1
0
Unspecified Rare Earths, % 0
1.8 to 2.5
Zinc (Zn), % 5.1 to 6.1
0
Zirconium (Zr), % 0
0.4 to 1.0
Residuals, % 0
0 to 0.3