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ZK40A Magnesium vs. 4104 Aluminum

ZK40A magnesium belongs to the magnesium alloys classification, while 4104 aluminum belongs to the aluminum alloys. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is ZK40A magnesium and the bottom bar is 4104 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
71
Elongation at Break, % 4.2
2.4
Fatigue Strength, MPa 190
42
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 17
27
Shear Strength, MPa 160
63
Tensile Strength: Ultimate (UTS), MPa 280
110
Tensile Strength: Yield (Proof), MPa 260
60

Thermal Properties

Latent Heat of Fusion, J/g 340
540
Maximum Temperature: Mechanical, °C 120
160
Melting Completion (Liquidus), °C 600
600
Melting Onset (Solidus), °C 540
560
Specific Heat Capacity, J/kg-K 970
900
Thermal Conductivity, W/m-K 110
130
Thermal Expansion, µm/m-K 26
22

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
33
Electrical Conductivity: Equal Weight (Specific), % IACS 130
120

Otherwise Unclassified Properties

Base Metal Price, % relative 13
9.5
Density, g/cm3 1.8
2.6
Embodied Carbon, kg CO2/kg material 24
8.0
Embodied Energy, MJ/kg 160
150
Embodied Water, L/kg 950
1080

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
2.3
Resilience: Unit (Modulus of Resilience), kJ/m3 740
25
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 65
54
Strength to Weight: Axial, points 43
12
Strength to Weight: Bending, points 53
20
Thermal Diffusivity, mm2/s 62
58
Thermal Shock Resistance, points 17
5.1

Alloy Composition

Aluminum (Al), % 0
85.8 to 90
Bismuth (Bi), % 0
0.020 to 0.2
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 0
0 to 0.8
Magnesium (Mg), % 94.2 to 96.1
1.0 to 2.0
Manganese (Mn), % 0
0 to 0.1
Silicon (Si), % 0
9.0 to 10.5
Zinc (Zn), % 3.5 to 4.5
0 to 0.2
Zirconium (Zr), % 0.45 to 1.0
0
Residuals, % 0
0 to 0.15