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6061-T4 Aluminum vs. AZ91E-T4 Magnesium

6061-T4 aluminum belongs to the aluminum alloys classification, while AZ91E-T4 magnesium belongs to the magnesium alloys. There are 31 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 6061-T4 aluminum and the bottom bar is AZ91E-T4 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 63
75
Elastic (Young's, Tensile) Modulus, GPa 69
46
Elongation at Break, % 18
6.2
Fatigue Strength, MPa 96
85
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 26
18
Shear Strength, MPa 170
140
Tensile Strength: Ultimate (UTS), MPa 230
250
Tensile Strength: Yield (Proof), MPa 130
98

Thermal Properties

Latent Heat of Fusion, J/g 400
350
Maximum Temperature: Mechanical, °C 170
130
Melting Completion (Liquidus), °C 650
600
Melting Onset (Solidus), °C 580
500
Specific Heat Capacity, J/kg-K 900
990
Thermal Conductivity, W/m-K 170
84
Thermal Expansion, µm/m-K 24
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 43
10
Electrical Conductivity: Equal Weight (Specific), % IACS 140
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 36
12
Resilience: Unit (Modulus of Resilience), kJ/m3 120
110
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 50
69
Strength to Weight: Axial, points 23
40
Strength to Weight: Bending, points 30
51
Thermal Diffusivity, mm2/s 68
49
Thermal Shock Resistance, points 10
14

Alloy Composition

Aluminum (Al), % 95.9 to 98.6
8.1 to 9.3
Chromium (Cr), % 0.040 to 0.35
0
Copper (Cu), % 0.15 to 0.4
0 to 0.015
Iron (Fe), % 0 to 0.7
0 to 0.0050
Magnesium (Mg), % 0.8 to 1.2
88.8 to 91.3
Manganese (Mn), % 0 to 0.15
0.17 to 0.35
Nickel (Ni), % 0
0 to 0.0010
Silicon (Si), % 0.4 to 0.8
0 to 0.2
Titanium (Ti), % 0 to 0.15
0
Zinc (Zn), % 0 to 0.25
0.4 to 1.0
Residuals, % 0
0 to 0.3