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772.0-T6 Aluminum vs. AZ91E-T6 Magnesium

772.0-T6 aluminum belongs to the aluminum alloys classification, while AZ91E-T6 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 772.0-T6 aluminum and the bottom bar is AZ91E-T6 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
46
Elongation at Break, % 8.4
3.9
Fatigue Strength, MPa 94
84
Poisson's Ratio 0.32
0.29
Shear Modulus, GPa 26
18
Tensile Strength: Ultimate (UTS), MPa 320
260
Tensile Strength: Yield (Proof), MPa 250
130

Thermal Properties

Latent Heat of Fusion, J/g 380
350
Maximum Temperature: Mechanical, °C 180
130
Melting Completion (Liquidus), °C 630
600
Melting Onset (Solidus), °C 580
500
Specific Heat Capacity, J/kg-K 870
990
Thermal Conductivity, W/m-K 150
84
Thermal Expansion, µm/m-K 24
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 35
11
Electrical Conductivity: Equal Weight (Specific), % IACS 110
58

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 3.0
1.7
Embodied Carbon, kg CO2/kg material 8.0
22
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1140
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 25
8.6
Resilience: Unit (Modulus of Resilience), kJ/m3 430
190
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 46
69
Strength to Weight: Axial, points 31
42
Strength to Weight: Bending, points 36
53
Thermal Diffusivity, mm2/s 58
49
Thermal Shock Resistance, points 14
15

Alloy Composition

Aluminum (Al), % 91.2 to 93.2
8.1 to 9.3
Chromium (Cr), % 0.060 to 0.2
0
Copper (Cu), % 0 to 0.1
0 to 0.015
Iron (Fe), % 0 to 0.15
0 to 0.0050
Magnesium (Mg), % 0.6 to 0.8
88.8 to 91.3
Manganese (Mn), % 0 to 0.1
0.17 to 0.35
Nickel (Ni), % 0
0 to 0.0010
Silicon (Si), % 0 to 0.15
0 to 0.2
Titanium (Ti), % 0.1 to 0.2
0
Zinc (Zn), % 6.0 to 7.0
0.4 to 1.0
Residuals, % 0
0 to 0.3