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5182 Aluminum vs. ZK51A Magnesium

5182 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 (1, in this case) are not shown.

For each property being compared, the top bar is 5182 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, % 1.1 to 12
4.7
Fatigue Strength, MPa 100 to 130
62
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 25
18
Shear Strength, MPa 170 to 240
160
Tensile Strength: Ultimate (UTS), MPa 280 to 420
240
Tensile Strength: Yield (Proof), MPa 130 to 360
150

Thermal Properties

Latent Heat of Fusion, J/g 390
340
Maximum Temperature: Mechanical, °C 180
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 28
28
Electrical Conductivity: Equal Weight (Specific), % IACS 94
140

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.7
1.8
Embodied Carbon, kg CO2/kg material 8.9
24
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1180
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 2.6 to 49
10
Resilience: Unit (Modulus of Resilience), kJ/m3 120 to 950
260
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 51
64
Strength to Weight: Axial, points 29 to 44
36
Strength to Weight: Bending, points 36 to 47
47
Thermal Diffusivity, mm2/s 53
61
Thermal Shock Resistance, points 12 to 19
15

Alloy Composition

Aluminum (Al), % 93.2 to 95.8
0
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0 to 0.15
0 to 0.1
Iron (Fe), % 0 to 0.35
0
Magnesium (Mg), % 4.0 to 5.0
93.1 to 95.9
Manganese (Mn), % 0.2 to 0.5
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 0 to 0.2
0
Titanium (Ti), % 0 to 0.1
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