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7022 Aluminum vs. AWS BMg-1

7022 aluminum belongs to the aluminum alloys classification, while AWS BMg-1 belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is 7022 aluminum and the bottom bar is AWS BMg-1.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
47
Elongation at Break, % 6.3 to 8.0
3.8
Fatigue Strength, MPa 140 to 170
72
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 290 to 320
100
Tensile Strength: Ultimate (UTS), MPa 490 to 540
180
Tensile Strength: Yield (Proof), MPa 390 to 460
110

Thermal Properties

Latent Heat of Fusion, J/g 380
350
Maximum Temperature: Mechanical, °C 200
130
Melting Completion (Liquidus), °C 640
600
Melting Onset (Solidus), °C 480
440
Specific Heat Capacity, J/kg-K 870
980
Thermal Conductivity, W/m-K 140
76
Thermal Expansion, µm/m-K 24
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 21
11
Electrical Conductivity: Equal Weight (Specific), % IACS 65
55

Otherwise Unclassified Properties

Base Metal Price, % relative 10
12
Density, g/cm3 2.9
1.8
Embodied Carbon, kg CO2/kg material 8.5
22
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1130
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 29 to 40
5.9
Resilience: Unit (Modulus of Resilience), kJ/m3 1100 to 1500
120
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
66
Strength to Weight: Axial, points 47 to 51
27
Strength to Weight: Bending, points 47 to 50
39
Thermal Diffusivity, mm2/s 54
43
Thermal Shock Resistance, points 21 to 23
10

Alloy Composition

Aluminum (Al), % 87.9 to 92.4
8.3 to 9.7
Beryllium (Be), % 0
0.00020 to 0.00080
Chromium (Cr), % 0.1 to 0.3
0
Copper (Cu), % 0.5 to 1.0
0 to 0.050
Iron (Fe), % 0 to 0.5
0 to 0.0050
Magnesium (Mg), % 2.6 to 3.7
86.1 to 89.8
Manganese (Mn), % 0.1 to 0.4
0.15 to 1.5
Nickel (Ni), % 0
0 to 0.0050
Silicon (Si), % 0 to 0.5
0 to 0.050
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 4.3 to 5.2
1.7 to 2.3
Zirconium (Zr), % 0 to 0.2
0
Residuals, % 0 to 0.15
0 to 0.3