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Cork vs. Zamak 7

Cork and Zamak 7 belong to fundamentally different material chemistries. Cork is a polymeric material, while Zamak 7 is a metal. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 15 material properties with values for both materials. Properties with values for just one material (20, 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 cork and the bottom bar is Zamak 7.

Metric UnitsUS Customary Units

Mechanical Properties

Compressive (Crushing) Strength, MPa 1.0
410
Elastic (Young's, Tensile) Modulus, GPa 0.020
86
Elongation at Break, % 15
13
Shear Modulus, GPa 0.010
33
Tensile Strength: Ultimate (UTS), MPa 0.85
280

Thermal Properties

Specific Heat Capacity, J/kg-K 2000
410
Thermal Conductivity, W/m-K 0.040
110
Thermal Expansion, µm/m-K 200
27

Otherwise Unclassified Properties

Density, g/cm3 0.15
6.4

Common Calculations

Stiffness to Weight: Axial, points 0.074
7.5
Stiffness to Weight: Bending, points 60
23
Strength to Weight: Axial, points 1.6
12
Strength to Weight: Bending, points 13
15
Thermal Diffusivity, mm2/s 0.13
43
Thermal Shock Resistance, points 16
8.6