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851.0 Aluminum vs. AZ31C Magnesium

851.0 aluminum belongs to the aluminum alloys classification, while AZ31C magnesium belongs to the magnesium alloys. There are 25 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is 851.0 aluminum and the bottom bar is AZ31C magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
45
Elongation at Break, % 3.9 to 9.1
12
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
17
Tensile Strength: Ultimate (UTS), MPa 130 to 140
260

Thermal Properties

Latent Heat of Fusion, J/g 410
350
Maximum Temperature: Mechanical, °C 180
110
Melting Completion (Liquidus), °C 630
600
Melting Onset (Solidus), °C 360
550
Specific Heat Capacity, J/kg-K 850
990
Thermal Conductivity, W/m-K 180
130
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 46
19
Electrical Conductivity: Equal Weight (Specific), % IACS 140
98

Otherwise Unclassified Properties

Base Metal Price, % relative 14
12
Density, g/cm3 3.1
1.7
Embodied Carbon, kg CO2/kg material 8.4
23
Embodied Energy, MJ/kg 160
160
Embodied Water, L/kg 1140
970

Common Calculations

Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 45
70
Strength to Weight: Axial, points 12 to 13
42
Strength to Weight: Bending, points 19 to 20
53
Thermal Diffusivity, mm2/s 69
74
Thermal Shock Resistance, points 6.1 to 6.3
16

Alloy Composition

Aluminum (Al), % 86.6 to 91.5
2.4 to 3.6
Copper (Cu), % 0.7 to 1.3
0 to 0.1
Iron (Fe), % 0 to 0.7
0
Magnesium (Mg), % 0 to 0.1
93.4 to 97
Manganese (Mn), % 0 to 0.1
0.15 to 1.0
Nickel (Ni), % 0.3 to 0.7
0 to 0.030
Silicon (Si), % 2.0 to 3.0
0 to 0.1
Tin (Sn), % 5.5 to 7.0
0
Titanium (Ti), % 0 to 0.2
0
Zinc (Zn), % 0
0.5 to 1.5
Residuals, % 0
0 to 0.3