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2018 Aluminum vs. AZ63A Magnesium

2018 aluminum belongs to the aluminum alloys classification, while AZ63A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is 2018 aluminum and the bottom bar is AZ63A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 73
46
Elongation at Break, % 9.6
2.2 to 8.0
Fatigue Strength, MPa 120
76 to 83
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
18
Shear Strength, MPa 270
110 to 160
Tensile Strength: Ultimate (UTS), MPa 420
190 to 270
Tensile Strength: Yield (Proof), MPa 310
81 to 120

Thermal Properties

Latent Heat of Fusion, J/g 390
350
Maximum Temperature: Mechanical, °C 220
120
Melting Completion (Liquidus), °C 640
610
Melting Onset (Solidus), °C 510
450
Specific Heat Capacity, J/kg-K 870
980
Thermal Conductivity, W/m-K 150
52 to 65
Thermal Expansion, µm/m-K 22
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 40
12 to 15
Electrical Conductivity: Equal Weight (Specific), % IACS 120
59 to 74

Otherwise Unclassified Properties

Base Metal Price, % relative 11
12
Density, g/cm3 3.1
1.8
Embodied Carbon, kg CO2/kg material 8.1
22
Embodied Energy, MJ/kg 150
150
Embodied Water, L/kg 1130
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 37
3.7 to 16
Resilience: Unit (Modulus of Resilience), kJ/m3 670
71 to 160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 45
66
Strength to Weight: Axial, points 38
29 to 41
Strength to Weight: Bending, points 41
40 to 51
Thermal Diffusivity, mm2/s 57
29 to 37
Thermal Shock Resistance, points 19
11 to 16

Alloy Composition

Aluminum (Al), % 89.7 to 94.4
5.3 to 6.7
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 3.5 to 4.5
0 to 0.25
Iron (Fe), % 0 to 1.0
0
Magnesium (Mg), % 0.45 to 0.9
88.6 to 92.1
Manganese (Mn), % 0 to 0.2
0.15 to 0.35
Nickel (Ni), % 1.7 to 2.3
0 to 0.010
Silicon (Si), % 0 to 0.9
0 to 0.3
Zinc (Zn), % 0 to 0.25
2.5 to 3.5
Residuals, % 0
0 to 0.3