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5086 Aluminum vs. ZK51A Magnesium

5086 aluminum belongs to the aluminum alloys classification, while ZK51A magnesium belongs to the magnesium 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 5086 aluminum and the bottom bar is ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
45
Elongation at Break, % 1.7 to 20
4.7
Fatigue Strength, MPa 88 to 180
62
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 160 to 230
160
Tensile Strength: Ultimate (UTS), MPa 270 to 390
240
Tensile Strength: Yield (Proof), MPa 110 to 320
150

Thermal Properties

Latent Heat of Fusion, J/g 400
340
Maximum Temperature: Mechanical, °C 190
120
Melting Completion (Liquidus), °C 640
640
Melting Onset (Solidus), °C 590
550
Specific Heat Capacity, J/kg-K 900
970
Thermal Conductivity, W/m-K 130
110
Thermal Expansion, µm/m-K 24
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
28
Electrical Conductivity: Equal Weight (Specific), % IACS 100
140

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.7
1.8
Embodied Carbon, kg CO2/kg material 8.8
24
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1180
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 5.8 to 42
10
Resilience: Unit (Modulus of Resilience), kJ/m3 86 to 770
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 50
64
Strength to Weight: Axial, points 28 to 40
36
Strength to Weight: Bending, points 34 to 44
47
Thermal Diffusivity, mm2/s 52
61
Thermal Shock Resistance, points 12 to 17
15

Alloy Composition

Aluminum (Al), % 93 to 96.3
0
Chromium (Cr), % 0.050 to 0.25
0
Copper (Cu), % 0 to 0.1
0 to 0.1
Iron (Fe), % 0 to 0.5
0
Magnesium (Mg), % 3.5 to 4.5
93.1 to 95.9
Manganese (Mn), % 0.2 to 0.7
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.4
0
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3