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2011A Aluminum vs. AZ91B Magnesium

2011A aluminum belongs to the aluminum alloys classification, while AZ91B magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is 2011A aluminum and the bottom bar is AZ91B magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
46
Elongation at Break, % 6.8 to 16
5.0
Fatigue Strength, MPa 75 to 100
79
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 190 to 250
140
Tensile Strength: Ultimate (UTS), MPa 310 to 410
240
Tensile Strength: Yield (Proof), MPa 140 to 310
160

Thermal Properties

Latent Heat of Fusion, J/g 390
360
Maximum Temperature: Mechanical, °C 190
130
Melting Completion (Liquidus), °C 660
600
Melting Onset (Solidus), °C 550
470
Specific Heat Capacity, J/kg-K 870
990
Thermal Conductivity, W/m-K 130
73
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
11
Electrical Conductivity: Equal Weight (Specific), % IACS 96
58

Otherwise Unclassified Properties

Base Metal Price, % relative 11
12
Density, g/cm3 3.1
1.7
Embodied Carbon, kg CO2/kg material 7.9
22
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1150
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 20 to 40
11
Resilience: Unit (Modulus of Resilience), kJ/m3 140 to 670
280
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 44
69
Strength to Weight: Axial, points 28 to 37
38
Strength to Weight: Bending, points 33 to 40
49
Thermal Diffusivity, mm2/s 49
42
Thermal Shock Resistance, points 14 to 18
14

Alloy Composition

Aluminum (Al), % 91.5 to 95.1
8.3 to 9.7
Bismuth (Bi), % 0.2 to 0.6
0
Copper (Cu), % 4.5 to 6.0
0 to 0.35
Iron (Fe), % 0 to 0.5
0
Lead (Pb), % 0.2 to 0.6
0
Magnesium (Mg), % 0
87.9 to 91.2
Manganese (Mn), % 0
0.13 to 0.5
Nickel (Ni), % 0
0 to 0.030
Silicon (Si), % 0 to 0.4
0 to 0.5
Zinc (Zn), % 0 to 0.3
0.35 to 1.0
Residuals, % 0 to 0.15
0