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ISO-WD43150 Magnesium vs. Zamak 7

ISO-WD43150 magnesium belongs to the magnesium alloys classification, while Zamak 7 belongs to the zinc alloys. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is ISO-WD43150 magnesium and the bottom bar is Zamak 7.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 45
86
Elongation at Break, % 2.8
13
Fatigue Strength, MPa 100
47
Poisson's Ratio 0.29
0.25
Shear Modulus, GPa 18
33
Shear Strength, MPa 140
210
Tensile Strength: Ultimate (UTS), MPa 250
280
Tensile Strength: Yield (Proof), MPa 150
250

Thermal Properties

Latent Heat of Fusion, J/g 350
120
Maximum Temperature: Mechanical, °C 95
95
Melting Completion (Liquidus), °C 610
390
Melting Onset (Solidus), °C 590
380
Specific Heat Capacity, J/kg-K 990
410
Thermal Conductivity, W/m-K 140
110
Thermal Expansion, µm/m-K 27
27

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 31
27
Electrical Conductivity: Equal Weight (Specific), % IACS 170
38

Otherwise Unclassified Properties

Base Metal Price, % relative 12
11
Density, g/cm3 1.7
6.4
Embodied Carbon, kg CO2/kg material 24
3.0
Embodied Energy, MJ/kg 160
57
Embodied Water, L/kg 970
380

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 6.1
36
Resilience: Unit (Modulus of Resilience), kJ/m3 250
370
Stiffness to Weight: Axial, points 15
7.5
Stiffness to Weight: Bending, points 71
23
Strength to Weight: Axial, points 41
12
Strength to Weight: Bending, points 52
15
Thermal Diffusivity, mm2/s 81
43
Thermal Shock Resistance, points 14
8.6

Alloy Composition


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Aluminum (Al), % 0
3.5 to 4.3
Cadmium (Cd), % 0
0 to 0.0020
Copper (Cu), % 0 to 0.050
0 to 0.25
Iron (Fe), % 0
0 to 0.075
Lead (Pb), % 0
0 to 0.0030
Magnesium (Mg), % 97.5 to 98.8
0.0050 to 0.020
Manganese (Mn), % 1.2 to 2.0
0
Nickel (Ni), % 0 to 0.010
0.0050 to 0.020
Silicon (Si), % 0 to 0.1
0
Tin (Sn), % 0
0 to 0.0010
Zinc (Zn), % 0
95.3 to 96.5
Residuals, % 0 to 0.3
0