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AZ81A Magnesium vs. 6261 Aluminum

AZ81A magnesium belongs to the magnesium alloys classification, while 6261 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 AZ81A magnesium and the bottom bar is 6261 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
69
Elongation at Break, % 3.0 to 8.8
9.0 to 16
Fatigue Strength, MPa 78 to 80
60 to 120
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
26
Shear Strength, MPa 91 to 130
90 to 180
Tensile Strength: Ultimate (UTS), MPa 160 to 240
150 to 300
Tensile Strength: Yield (Proof), MPa 84
100 to 260

Thermal Properties

Latent Heat of Fusion, J/g 350
400
Maximum Temperature: Mechanical, °C 130
160
Melting Completion (Liquidus), °C 600
640
Melting Onset (Solidus), °C 500
610
Specific Heat Capacity, J/kg-K 990
900
Thermal Conductivity, W/m-K 84
180
Thermal Expansion, µm/m-K 27
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 12
48
Electrical Conductivity: Equal Weight (Specific), % IACS 65
160

Otherwise Unclassified Properties

Base Metal Price, % relative 12
9.5
Density, g/cm3 1.7
2.7
Embodied Carbon, kg CO2/kg material 23
8.3
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 990
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 4.0 to 17
21 to 27
Resilience: Unit (Modulus of Resilience), kJ/m3 77 to 78
77 to 500
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 70
50
Strength to Weight: Axial, points 26 to 39
15 to 31
Strength to Weight: Bending, points 38 to 50
23 to 37
Thermal Diffusivity, mm2/s 50
75
Thermal Shock Resistance, points 9.1 to 14
6.5 to 13

Alloy Composition

Aluminum (Al), % 7.0 to 8.1
96.6 to 98.6
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 0 to 0.1
0.15 to 0.4
Iron (Fe), % 0
0 to 0.4
Magnesium (Mg), % 89.8 to 92.5
0.7 to 1.0
Manganese (Mn), % 0.13 to 0.35
0.2 to 0.35
Nickel (Ni), % 0 to 0.010
0
Silicon (Si), % 0 to 0.3
0.4 to 0.7
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0.4 to 1.0
0 to 0.2
Residuals, % 0
0 to 0.15

Comparable Variants