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2014 Aluminum vs. AZ91B Magnesium

2014 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 2014 aluminum and the bottom bar is AZ91B magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
46
Elongation at Break, % 1.5 to 16
5.0
Fatigue Strength, MPa 90 to 160
79
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
18
Shear Strength, MPa 130 to 290
140
Tensile Strength: Ultimate (UTS), MPa 190 to 500
240
Tensile Strength: Yield (Proof), MPa 100 to 440
160

Thermal Properties

Latent Heat of Fusion, J/g 400
360
Maximum Temperature: Mechanical, °C 210
130
Melting Completion (Liquidus), °C 630
600
Melting Onset (Solidus), °C 510
470
Specific Heat Capacity, J/kg-K 870
990
Thermal Conductivity, W/m-K 150
73
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
11
Electrical Conductivity: Equal Weight (Specific), % IACS 120
58

Otherwise Unclassified Properties

Base Metal Price, % relative 11
12
Density, g/cm3 3.0
1.7
Embodied Carbon, kg CO2/kg material 8.1
22
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1130
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.6 to 56
11
Resilience: Unit (Modulus of Resilience), kJ/m3 76 to 1330
280
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 46
69
Strength to Weight: Axial, points 18 to 46
38
Strength to Weight: Bending, points 25 to 46
49
Thermal Diffusivity, mm2/s 58
42
Thermal Shock Resistance, points 8.4 to 22
14

Alloy Composition

Aluminum (Al), % 90.4 to 95
8.3 to 9.7
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.9 to 5.0
0 to 0.35
Iron (Fe), % 0 to 0.7
0
Magnesium (Mg), % 0.2 to 0.8
87.9 to 91.2
Manganese (Mn), % 0.4 to 1.2
0.13 to 0.5
Nickel (Ni), % 0
0 to 0.030
Silicon (Si), % 0.5 to 1.2
0 to 0.5
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
0.35 to 1.0
Zirconium (Zr), % 0 to 0.2
0
Residuals, % 0 to 0.15
0