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6261-T4 Aluminum vs. AZ91E-T4 Magnesium

6261-T4 aluminum belongs to the aluminum alloys classification, while AZ91E-T4 magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is 6261-T4 aluminum and the bottom bar is AZ91E-T4 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 69
46
Elongation at Break, % 16
6.2
Fatigue Strength, MPa 60
85
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 120
140
Tensile Strength: Ultimate (UTS), MPa 200
250
Tensile Strength: Yield (Proof), MPa 110
98

Thermal Properties

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

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 48
10
Electrical Conductivity: Equal Weight (Specific), % IACS 160
52

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.7
1.7
Embodied Carbon, kg CO2/kg material 8.3
22
Embodied Energy, MJ/kg 150
160
Embodied Water, L/kg 1180
990

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 27
12
Resilience: Unit (Modulus of Resilience), kJ/m3 95
110
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
69
Strength to Weight: Axial, points 21
40
Strength to Weight: Bending, points 28
51
Thermal Diffusivity, mm2/s 75
49
Thermal Shock Resistance, points 9.0
14

Alloy Composition

Aluminum (Al), % 96.6 to 98.6
8.1 to 9.3
Chromium (Cr), % 0 to 0.1
0
Copper (Cu), % 0.15 to 0.4
0 to 0.015
Iron (Fe), % 0 to 0.4
0 to 0.0050
Magnesium (Mg), % 0.7 to 1.0
88.8 to 91.3
Manganese (Mn), % 0.2 to 0.35
0.17 to 0.35
Nickel (Ni), % 0
0 to 0.0010
Silicon (Si), % 0.4 to 0.7
0 to 0.2
Titanium (Ti), % 0 to 0.1
0
Zinc (Zn), % 0 to 0.2
0.4 to 1.0
Residuals, % 0
0 to 0.3