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7022 Aluminum vs. ISO-WD32350 Magnesium

7022 aluminum belongs to the aluminum alloys classification, while ISO-WD32350 magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 7022 aluminum and the bottom bar is ISO-WD32350 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
45
Elongation at Break, % 6.3 to 8.0
5.7 to 10
Fatigue Strength, MPa 140 to 170
120 to 130
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 290 to 320
150 to 170
Tensile Strength: Ultimate (UTS), MPa 490 to 540
250 to 290
Tensile Strength: Yield (Proof), MPa 390 to 460
140 to 180

Thermal Properties

Latent Heat of Fusion, J/g 380
340
Maximum Temperature: Mechanical, °C 200
95
Melting Completion (Liquidus), °C 640
600
Melting Onset (Solidus), °C 480
560
Specific Heat Capacity, J/kg-K 870
990
Thermal Conductivity, W/m-K 140
130
Thermal Expansion, µm/m-K 24
25

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 21
25
Electrical Conductivity: Equal Weight (Specific), % IACS 65
130

Otherwise Unclassified Properties

Base Metal Price, % relative 10
12
Density, g/cm3 2.9
1.7
Embodied Carbon, kg CO2/kg material 8.5
23
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1130
960

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 29 to 40
14 to 23
Resilience: Unit (Modulus of Resilience), kJ/m3 1100 to 1500
210 to 380
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 47
68
Strength to Weight: Axial, points 47 to 51
39 to 46
Strength to Weight: Bending, points 47 to 50
50 to 55
Thermal Diffusivity, mm2/s 54
73
Thermal Shock Resistance, points 21 to 23
16 to 18

Alloy Composition

Aluminum (Al), % 87.9 to 92.4
0 to 0.1
Chromium (Cr), % 0.1 to 0.3
0
Copper (Cu), % 0.5 to 1.0
0 to 0.1
Iron (Fe), % 0 to 0.5
0 to 0.060
Magnesium (Mg), % 2.6 to 3.7
95.7 to 97.7
Manganese (Mn), % 0.1 to 0.4
0.6 to 1.3
Nickel (Ni), % 0
0 to 0.0050
Silicon (Si), % 0 to 0.5
0 to 0.1
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 4.3 to 5.2
1.8 to 2.3
Zirconium (Zr), % 0 to 0.2
0
Residuals, % 0
0 to 0.3