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4047 Aluminum vs. ZK51A Magnesium

4047 aluminum belongs to the aluminum alloys classification, while ZK51A 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 ZK51A magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 72
45
Elongation at Break, % 3.4
4.7
Fatigue Strength, MPa 45
62
Poisson's Ratio 0.33
0.29
Shear Modulus, GPa 27
18
Shear Strength, MPa 69
160
Tensile Strength: Ultimate (UTS), MPa 120
240
Tensile Strength: Yield (Proof), MPa 64
150

Thermal Properties

Latent Heat of Fusion, J/g 570
340
Maximum Temperature: Mechanical, °C 160
120
Melting Completion (Liquidus), °C 580
640
Melting Onset (Solidus), °C 580
550
Specific Heat Capacity, J/kg-K 900
970
Thermal Conductivity, W/m-K 130
110
Thermal Expansion, µm/m-K 21
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 33
28
Electrical Conductivity: Equal Weight (Specific), % IACS 120
140

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
13
Density, g/cm3 2.5
1.8
Embodied Carbon, kg CO2/kg material 7.7
24
Embodied Energy, MJ/kg 140
160
Embodied Water, L/kg 1050
940

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 3.5
10
Resilience: Unit (Modulus of Resilience), kJ/m3 28
260
Stiffness to Weight: Axial, points 16
14
Stiffness to Weight: Bending, points 55
64
Strength to Weight: Axial, points 13
36
Strength to Weight: Bending, points 21
47
Thermal Diffusivity, mm2/s 59
61
Thermal Shock Resistance, points 5.6
15

Alloy Composition

Aluminum (Al), % 85.3 to 89
0
Copper (Cu), % 0 to 0.3
0 to 0.1
Iron (Fe), % 0 to 0.8
0
Magnesium (Mg), % 0 to 0.1
93.1 to 95.9
Manganese (Mn), % 0 to 0.15
0
Nickel (Ni), % 0
0 to 0.010
Silicon (Si), % 11 to 13
0
Zinc (Zn), % 0 to 0.2
3.6 to 5.5
Zirconium (Zr), % 0
0.5 to 1.0
Residuals, % 0
0 to 0.3