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AZ91D Magnesium vs. 5086 Aluminum

AZ91D magnesium belongs to the magnesium alloys classification, while 5086 aluminum belongs to the aluminum alloys. There are 31 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 AZ91D magnesium and the bottom bar is 5086 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 60 to 80
65 to 100
Elastic (Young's, Tensile) Modulus, GPa 46
68
Elongation at Break, % 2.3 to 4.5
1.7 to 20
Fatigue Strength, MPa 74 to 85
88 to 180
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
26
Shear Strength, MPa 120 to 140
160 to 230
Tensile Strength: Ultimate (UTS), MPa 160 to 220
270 to 390
Tensile Strength: Yield (Proof), MPa 80 to 130
110 to 320

Thermal Properties

Latent Heat of Fusion, J/g 350
400
Maximum Temperature: Mechanical, °C 130
190
Melting Completion (Liquidus), °C 600
640
Melting Onset (Solidus), °C 490
590
Specific Heat Capacity, J/kg-K 990
900
Thermal Conductivity, W/m-K 78
130
Thermal Expansion, µm/m-K 27
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 11
31
Electrical Conductivity: Equal Weight (Specific), % IACS 58
100

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.5
Density, g/cm3 1.7
2.7
Embodied Carbon, kg CO2/kg material 22
8.8
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 990
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.2 to 7.7
5.8 to 42
Resilience: Unit (Modulus of Resilience), kJ/m3 69 to 170
86 to 770
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
50
Strength to Weight: Axial, points 26 to 34
28 to 40
Strength to Weight: Bending, points 38 to 46
34 to 44
Thermal Diffusivity, mm2/s 45
52
Thermal Shock Resistance, points 9.5 to 13
12 to 17

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
93 to 96.3
Chromium (Cr), % 0
0.050 to 0.25
Copper (Cu), % 0 to 0.030
0 to 0.1
Iron (Fe), % 0 to 0.0050
0 to 0.5
Magnesium (Mg), % 88.7 to 91.2
3.5 to 4.5
Manganese (Mn), % 0.15 to 0.5
0.2 to 0.7
Nickel (Ni), % 0 to 0.0020
0
Silicon (Si), % 0 to 0.1
0 to 0.4
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0.35 to 1.0
0 to 0.25
Residuals, % 0
0 to 0.15

Comparable Variants