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AZ91A Magnesium vs. 6105 Aluminum

AZ91A magnesium belongs to the magnesium alloys classification, while 6105 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 6105 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 46
68
Elongation at Break, % 5.0
9.0 to 16
Fatigue Strength, MPa 99
95 to 130
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 18
26
Shear Strength, MPa 140
120 to 170
Tensile Strength: Ultimate (UTS), MPa 240
190 to 280
Tensile Strength: Yield (Proof), MPa 160
120 to 270

Thermal Properties

Latent Heat of Fusion, J/g 360
410
Maximum Temperature: Mechanical, °C 130
160
Melting Completion (Liquidus), °C 600
650
Melting Onset (Solidus), °C 470
600
Specific Heat Capacity, J/kg-K 990
900
Thermal Conductivity, W/m-K 73
180 to 190
Thermal Expansion, µm/m-K 26
23

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 10
46 to 50
Electrical Conductivity: Equal Weight (Specific), % IACS 52
150 to 170

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
1180

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 11
25 to 27
Resilience: Unit (Modulus of Resilience), kJ/m3 280
100 to 550
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 69
51
Strength to Weight: Axial, points 38
20 to 29
Strength to Weight: Bending, points 49
28 to 35
Thermal Diffusivity, mm2/s 42
72 to 79
Thermal Shock Resistance, points 14
8.6 to 12

Alloy Composition


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Aluminum (Al), % 8.3 to 9.7
97.2 to 99
Chromium (Cr), % 0
0 to 0.1
Copper (Cu), % 0 to 0.1
0 to 0.1
Iron (Fe), % 0
0 to 0.35
Magnesium (Mg), % 88.2 to 91.2
0.45 to 0.8
Manganese (Mn), % 0.13 to 0.5
0 to 0.1
Nickel (Ni), % 0 to 0.030
0
Silicon (Si), % 0 to 0.5
0.6 to 1.0
Titanium (Ti), % 0
0 to 0.1
Zinc (Zn), % 0.35 to 1.0
0 to 0.1
Residuals, % 0
0 to 0.15