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Commercially Pure Zinc vs. EN-MC21320 Magnesium

Commercially pure zinc belongs to the zinc alloys classification, while EN-MC21320 magnesium belongs to the magnesium alloys. There are 28 material properties with values for both materials. Properties with values for just one material (3, 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 commercially pure zinc and the bottom bar is EN-MC21320 magnesium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 87
45
Elongation at Break, % 38
7.5
Poisson's Ratio 0.25
0.29
Shear Modulus, GPa 35
18
Tensile Strength: Ultimate (UTS), MPa 97
230
Tensile Strength: Yield (Proof), MPa 79
140

Thermal Properties

Latent Heat of Fusion, J/g 110
370
Maximum Temperature: Mechanical, °C 90
110
Melting Completion (Liquidus), °C 410
600
Melting Onset (Solidus), °C 400
530
Specific Heat Capacity, J/kg-K 390
1000
Thermal Conductivity, W/m-K 110
66
Thermal Expansion, µm/m-K 26
26

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 27
17
Electrical Conductivity: Equal Weight (Specific), % IACS 37
91

Otherwise Unclassified Properties

Base Metal Price, % relative 11
12
Density, g/cm3 6.6
1.6
Embodied Carbon, kg CO2/kg material 2.8
23
Embodied Energy, MJ/kg 53
160
Embodied Water, L/kg 340
980

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 34
15
Resilience: Unit (Modulus of Resilience), kJ/m3 36
200
Stiffness to Weight: Axial, points 7.4
15
Stiffness to Weight: Bending, points 23
72
Strength to Weight: Axial, points 4.1
38
Strength to Weight: Bending, points 7.1
50
Thermal Diffusivity, mm2/s 44
40
Thermal Shock Resistance, points 3.0
13

Alloy Composition


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Aluminum (Al), % 0 to 0.010
3.5 to 5.0
Cadmium (Cd), % 0 to 0.010
0
Copper (Cu), % 0 to 0.080
0 to 0.010
Iron (Fe), % 0 to 0.020
0 to 0.0050
Lead (Pb), % 0 to 0.030
0
Magnesium (Mg), % 0
92.5 to 95.9
Manganese (Mn), % 0
0.1 to 0.7
Nickel (Ni), % 0
0 to 0.0020
Silicon (Si), % 0
0.5 to 1.5
Tin (Sn), % 0 to 0.0030
0
Titanium (Ti), % 0 to 0.020
0
Zinc (Zn), % 99.827 to 100
0 to 0.2
Residuals, % 0
0 to 0.010