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6063A Aluminum vs. AZ31C Magnesium

6063A aluminum belongs to the aluminum alloys classification, while AZ31C magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 6063A aluminum and the bottom bar is AZ31C magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 68
45
Elongation at Break, % 6.7 to 18
12
Fatigue Strength, MPa 53 to 80
150
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
17
Shear Strength, MPa 78 to 150
130
Tensile Strength: Ultimate (UTS), MPa 130 to 260
260
Tensile Strength: Yield (Proof), MPa 55 to 200
200

Thermal Properties

Latent Heat of Fusion, J/g 400
350
Maximum Temperature: Mechanical, °C 160
110
Melting Completion (Liquidus), °C 640
600
Melting Onset (Solidus), °C 620
550
Specific Heat Capacity, J/kg-K 900
990
Thermal Conductivity, W/m-K 200
130
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 49 to 54
19
Electrical Conductivity: Equal Weight (Specific), % IACS 160 to 180
98

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.7
1.7
Embodied Carbon, kg CO2/kg material 8.3
23
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1190
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 13 to 21
28
Resilience: Unit (Modulus of Resilience), kJ/m3 22 to 280
440
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
70
Strength to Weight: Axial, points 13 to 26
42
Strength to Weight: Bending, points 21 to 33
53
Thermal Diffusivity, mm2/s 83
74
Thermal Shock Resistance, points 5.6 to 11
16

Alloy Composition

Aluminum (Al), % 97.5 to 99
2.4 to 3.6
Chromium (Cr), % 0 to 0.050
0
Copper (Cu), % 0 to 0.1
0 to 0.1
Iron (Fe), % 0.15 to 0.35
0
Magnesium (Mg), % 0.6 to 0.9
93.4 to 97
Manganese (Mn), % 0 to 0.15
0.15 to 1.0
Nickel (Ni), % 0
0 to 0.030
Silicon (Si), % 0.3 to 0.6
0 to 0.1
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.15
0.5 to 1.5
Residuals, % 0
0 to 0.3