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7108 Aluminum vs. AZ92A Magnesium

7108 aluminum belongs to the aluminum alloys classification, while AZ92A magnesium 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 7108 aluminum and the bottom bar is AZ92A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
47
Elongation at Break, % 11
2.1 to 6.8
Fatigue Strength, MPa 120
76 to 90
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 210
97 to 160
Tensile Strength: Ultimate (UTS), MPa 350
170 to 270
Tensile Strength: Yield (Proof), MPa 290
83 to 140

Thermal Properties

Latent Heat of Fusion, J/g 380
350
Maximum Temperature: Mechanical, °C 210
130
Melting Completion (Liquidus), °C 630
590
Melting Onset (Solidus), °C 530
440
Specific Heat Capacity, J/kg-K 880
980
Thermal Conductivity, W/m-K 150
44 to 58
Thermal Expansion, µm/m-K 24
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 39
11 to 12
Electrical Conductivity: Equal Weight (Specific), % IACS 120
53 to 62

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.9
1.8
Embodied Carbon, kg CO2/kg material 8.3
22
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1150
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 38
4.0 to 14
Resilience: Unit (Modulus of Resilience), kJ/m3 620
73 to 220
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 47
67
Strength to Weight: Axial, points 34
26 to 41
Strength to Weight: Bending, points 38
38 to 51
Thermal Diffusivity, mm2/s 59
25 to 33
Thermal Shock Resistance, points 16
10 to 16

Alloy Composition

Aluminum (Al), % 92.4 to 94.7
8.3 to 9.7
Copper (Cu), % 0 to 0.050
0 to 0.25
Iron (Fe), % 0 to 0.1
0
Magnesium (Mg), % 0.7 to 1.4
86.7 to 90
Manganese (Mn), % 0 to 0.050
0.1 to 0.35
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.1
0 to 0.3
Titanium (Ti), % 0 to 0.050
0
Zinc (Zn), % 4.5 to 5.5
1.6 to 2.4
Zirconium (Zr), % 0.12 to 0.25
0
Residuals, % 0
0 to 0.3