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Cork vs. Austenitic Nodular Cast Iron

Cork and austenitic nodular cast iron belong to fundamentally different material chemistries. Cork is a polymeric material, while austenitic nodular cast iron is a metal. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 12 material properties with values for both materials. Properties with values for just one material (16, 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 austenitic nodular cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 0.020
180 to 190
Elongation at Break, % 15
6.8 to 34
Shear Modulus, GPa 0.010
70 to 72
Tensile Strength: Ultimate (UTS), MPa 0.85
430 to 500

Thermal Properties

Specific Heat Capacity, J/kg-K 2000
470 to 490
Thermal Expansion, µm/m-K 200
13 to 14

Otherwise Unclassified Properties

Density, g/cm3 0.15
7.7 to 8.0

Common Calculations

Stiffness to Weight: Axial, points 0.074
13
Stiffness to Weight: Bending, points 60
24 to 25
Strength to Weight: Axial, points 1.6
15 to 18
Strength to Weight: Bending, points 13
16 to 18
Thermal Shock Resistance, points 16
12 to 15