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AZ91A Magnesium vs. 6063A Aluminum

AZ91A magnesium belongs to the magnesium alloys classification, while 6063A 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 6063A aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
68
Elongation at Break, % 5.0
6.7 to 18
Fatigue Strength, MPa 99
53 to 80
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
26
Shear Strength, MPa 140
78 to 150
Tensile Strength: Ultimate (UTS), MPa 240
130 to 260
Tensile Strength: Yield (Proof), MPa 160
55 to 200

Thermal Properties

Latent Heat of Fusion, J/g 360
400
Maximum Temperature: Mechanical, °C 130
160
Melting Completion (Liquidus), °C 600
640
Melting Onset (Solidus), °C 470
620
Specific Heat Capacity, J/kg-K 990
900
Thermal Conductivity, W/m-K 73
200
Thermal Expansion, µm/m-K 26
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
49 to 54
Electrical Conductivity: Equal Weight (Specific), % IACS 52
160 to 180

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.5
Density, g/cm3 1.7
2.7
Embodied Carbon, kg CO2/kg material 22
8.3
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 990
1190

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
13 to 21
Resilience: Unit (Modulus of Resilience), kJ/m3 280
22 to 280
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
50
Strength to Weight: Axial, points 38
13 to 26
Strength to Weight: Bending, points 49
21 to 33
Thermal Diffusivity, mm2/s 42
83
Thermal Shock Resistance, points 14
5.6 to 11

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
97.5 to 99
Chromium (Cr), % 0
0 to 0.050
Copper (Cu), % 0 to 0.1
0 to 0.1
Iron (Fe), % 0
0.15 to 0.35
Magnesium (Mg), % 88.2 to 91.2
0.6 to 0.9
Manganese (Mn), % 0.13 to 0.5
0 to 0.15
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0.3 to 0.6
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0.35 to 1.0
0 to 0.15
Residuals, % 0
0 to 0.15