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6065 Aluminum vs. AZ31C Magnesium

6065 aluminum belongs to the aluminum alloys classification, while AZ31C magnesium belongs to the magnesium alloys.

For each property being compared, the top bar is 6065 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, % 4.5 to 11
12
Fatigue Strength, MPa 96 to 110
150
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
17
Shear Strength, MPa 190 to 230
130
Tensile Strength: Ultimate (UTS), MPa 310 to 400
260
Tensile Strength: Yield (Proof), MPa 270 to 380
200

Thermal Properties

Latent Heat of Fusion, J/g 400
350
Maximum Temperature: Mechanical, °C 180
110
Melting Completion (Liquidus), °C 640
600
Melting Onset (Solidus), °C 590
550
Specific Heat Capacity, J/kg-K 890
990
Thermal Conductivity, W/m-K 170
130
Thermal Expansion, µm/m-K 23
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 43
19
Electrical Conductivity: Equal Weight (Specific), % IACS 140
98

Otherwise Unclassified Properties

Base Metal Price, % relative 11
12
Density, g/cm3 2.8
1.7
Embodied Carbon, kg CO2/kg material 8.4
23
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1200
970

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 34
28
Resilience: Unit (Modulus of Resilience), kJ/m3 540 to 1040
440
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 49
70
Strength to Weight: Axial, points 31 to 40
42
Strength to Weight: Bending, points 36 to 43
53
Thermal Diffusivity, mm2/s 67
74
Thermal Shock Resistance, points 14 to 18
16

Alloy Composition

Aluminum (Al), % 94.4 to 98.2
2.4 to 3.6
Bismuth (Bi), % 0.5 to 1.5
0
Chromium (Cr), % 0 to 0.15
0
Copper (Cu), % 0.15 to 0.4
0 to 0.1
Iron (Fe), % 0 to 0.7
0
Lead (Pb), % 0 to 0.050
0
Magnesium (Mg), % 0.8 to 1.2
93.4 to 97
Manganese (Mn), % 0 to 0.15
0.15 to 1.0
Nickel (Ni), % 0
0 to 0.030
Silicon (Si), % 0.4 to 0.8
0 to 0.1
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.25
0.5 to 1.5
Zirconium (Zr), % 0 to 0.15
0
Residuals, % 0
0 to 0.3