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ZK40A Magnesium vs. 4145 Aluminum

ZK40A magnesium belongs to the magnesium alloys classification, while 4145 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 4145 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
73
Elongation at Break, % 4.2
2.2
Fatigue Strength, MPa 190
48
Poisson's Ratio 0.29
0.33
Shear Modulus, GPa 17
28
Shear Strength, MPa 160
69
Tensile Strength: Ultimate (UTS), MPa 280
120
Tensile Strength: Yield (Proof), MPa 260
68

Thermal Properties

Latent Heat of Fusion, J/g 340
540
Maximum Temperature: Mechanical, °C 120
160
Melting Completion (Liquidus), °C 600
590
Melting Onset (Solidus), °C 540
520
Specific Heat Capacity, J/kg-K 970
880
Thermal Conductivity, W/m-K 110
100
Thermal Expansion, µm/m-K 26
21

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
26
Electrical Conductivity: Equal Weight (Specific), % IACS 130
84

Otherwise Unclassified Properties

Base Metal Price, % relative 13
10
Density, g/cm3 1.8
2.8
Embodied Carbon, kg CO2/kg material 24
7.6
Embodied Energy, MJ/kg 160
140
Embodied Water, L/kg 950
1040

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 12
2.3
Resilience: Unit (Modulus of Resilience), kJ/m3 740
31
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 65
50
Strength to Weight: Axial, points 43
12
Strength to Weight: Bending, points 53
19
Thermal Diffusivity, mm2/s 62
42
Thermal Shock Resistance, points 17
5.5

Alloy Composition


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Aluminum (Al), % 0
83 to 87.4
Chromium (Cr), % 0
0 to 0.15
Copper (Cu), % 0
3.3 to 4.7
Iron (Fe), % 0
0 to 0.8
Magnesium (Mg), % 94.2 to 96.1
0 to 0.15
Manganese (Mn), % 0
0 to 0.15
Silicon (Si), % 0
9.3 to 10.7
Zinc (Zn), % 3.5 to 4.5
0 to 0.2
Zirconium (Zr), % 0.45 to 1.0
0
Residuals, % 0 to 0.3
0 to 0.15