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AZ91C Magnesium vs. 5086 Aluminum

AZ91C magnesium belongs to the magnesium alloys classification, while 5086 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AZ91C magnesium and the bottom bar is 5086 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
68
Elongation at Break, % 2.3 to 7.9
1.7 to 20
Fatigue Strength, MPa 56 to 85
88 to 180
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
26
Shear Strength, MPa 96 to 160
160 to 230
Tensile Strength: Ultimate (UTS), MPa 170 to 270
270 to 390
Tensile Strength: Yield (Proof), MPa 83 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 470
590
Specific Heat Capacity, J/kg-K 990
900
Thermal Conductivity, W/m-K 73
130
Thermal Expansion, µm/m-K 26
24

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.9 to 12
31
Electrical Conductivity: Equal Weight (Specific), % IACS 52 to 60
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 3.2 to 16
5.8 to 42
Resilience: Unit (Modulus of Resilience), kJ/m3 75 to 180
86 to 770
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
50
Strength to Weight: Axial, points 27 to 43
28 to 40
Strength to Weight: Bending, points 39 to 53
34 to 44
Thermal Diffusivity, mm2/s 43
52
Thermal Shock Resistance, points 9.9 to 16
12 to 17

Alloy Composition


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Aluminum (Al), % 8.1 to 9.3
93 to 96.3
Chromium (Cr), % 0
0.050 to 0.25
Copper (Cu), % 0 to 0.1
0 to 0.1
Iron (Fe), % 0
0 to 0.5
Magnesium (Mg), % 88.6 to 91.4
3.5 to 4.5
Manganese (Mn), % 0.13 to 0.35
0.2 to 0.7
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0 to 0.3
0 to 0.4
Titanium (Ti), % 0
0 to 0.15
Zinc (Zn), % 0.4 to 1.0
0 to 0.25
Residuals, % 0 to 0.3
0 to 0.15

Comparable Variants