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AZ91A Magnesium vs. 6065 Aluminum

AZ91A magnesium belongs to the magnesium alloys classification, while 6065 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AZ91A magnesium and the bottom bar is 6065 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
68
Elongation at Break, % 5.0
4.5 to 11
Fatigue Strength, MPa 99
96 to 110
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
26
Shear Strength, MPa 140
190 to 230
Tensile Strength: Ultimate (UTS), MPa 240
310 to 400
Tensile Strength: Yield (Proof), MPa 160
270 to 380

Thermal Properties

Latent Heat of Fusion, J/g 360
400
Maximum Temperature: Mechanical, °C 130
180
Melting Completion (Liquidus), °C 600
640
Melting Onset (Solidus), °C 470
590
Specific Heat Capacity, J/kg-K 990
890
Thermal Conductivity, W/m-K 73
170
Thermal Expansion, µm/m-K 26
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
43
Electrical Conductivity: Equal Weight (Specific), % IACS 52
140

Otherwise Unclassified Properties

Base Metal Price, % relative 12
11
Density, g/cm3 1.7
2.8
Embodied Carbon, kg CO2/kg material 22
8.4
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 990
1200

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
17 to 34
Resilience: Unit (Modulus of Resilience), kJ/m3 280
540 to 1040
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
49
Strength to Weight: Axial, points 38
31 to 40
Strength to Weight: Bending, points 49
36 to 43
Thermal Diffusivity, mm2/s 42
67
Thermal Shock Resistance, points 14
14 to 18

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
94.4 to 98.2
Bismuth (Bi), % 0
0.5 to 1.5
Chromium (Cr), % 0
0 to 0.15
Copper (Cu), % 0 to 0.1
0.15 to 0.4
Iron (Fe), % 0
0 to 0.7
Lead (Pb), % 0
0 to 0.050
Magnesium (Mg), % 88.2 to 91.2
0.8 to 1.2
Manganese (Mn), % 0.13 to 0.5
0 to 0.15
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0.4 to 0.8
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0.35 to 1.0
0 to 0.25
Zirconium (Zr), % 0
0 to 0.15
Residuals, % 0
0 to 0.15