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4047 Aluminum vs. AZ61A Magnesium

4047 aluminum belongs to the aluminum alloys classification, while AZ61A magnesium belongs to the magnesium alloys. There are 30 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is 4047 aluminum and the bottom bar is AZ61A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
45
Elongation at Break, % 3.4
11
Fatigue Strength, MPa 45
130
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
17
Shear Strength, MPa 69
150
Tensile Strength: Ultimate (UTS), MPa 120
280
Tensile Strength: Yield (Proof), MPa 64
170

Thermal Properties

Latent Heat of Fusion, J/g 570
350
Maximum Temperature: Mechanical, °C 160
120
Melting Completion (Liquidus), °C 580
600
Melting Onset (Solidus), °C 580
530
Specific Heat Capacity, J/kg-K 900
990
Thermal Conductivity, W/m-K 130
79
Thermal Expansion, µm/m-K 21
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
12
Electrical Conductivity: Equal Weight (Specific), % IACS 120
62

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
12
Density, g/cm3 2.5
1.7
Embodied Carbon, kg CO2/kg material 7.7
23
Embodied Energy, MJ/kg 140
160
Embodied Water, L/kg 1050
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.5
27
Resilience: Unit (Modulus of Resilience), kJ/m3 28
310
Stiffness to Weight: Axial, points 16
15
Stiffness to Weight: Bending, points 55
69
Strength to Weight: Axial, points 13
46
Strength to Weight: Bending, points 21
56
Thermal Diffusivity, mm2/s 59
47
Thermal Shock Resistance, points 5.6
17

Alloy Composition

Aluminum (Al), % 85.3 to 89
5.5 to 7.2
Copper (Cu), % 0 to 0.3
0 to 0.050
Iron (Fe), % 0 to 0.8
0 to 0.0050
Magnesium (Mg), % 0 to 0.1
90.3 to 93.9
Manganese (Mn), % 0 to 0.15
0.15 to 0.5
Nickel (Ni), % 0
0 to 0.0050
Silicon (Si), % 11 to 13
0 to 0.1
Zinc (Zn), % 0 to 0.2
0.4 to 1.5
Residuals, % 0
0 to 0.3