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Cork vs. 85-platinum 15-iridium

Cork and 85-platinum 15-iridium belong to fundamentally different material chemistries. Cork is a polymeric material, while 85-platinum 15-iridium 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 (11, 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 85-platinum 15-iridium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 0.020
220
Elongation at Break, % 15
5.5 to 34
Shear Modulus, GPa 0.010
81
Tensile Strength: Ultimate (UTS), MPa 0.85
560 to 730

Thermal Properties

Specific Heat Capacity, J/kg-K 2000
130
Thermal Expansion, µm/m-K 200
8.4

Otherwise Unclassified Properties

Density, g/cm3 0.15
22

Common Calculations

Stiffness to Weight: Axial, points 0.074
5.7
Stiffness to Weight: Bending, points 60
9.3
Strength to Weight: Axial, points 1.6
7.1 to 9.3
Strength to Weight: Bending, points 13
6.9 to 8.3
Thermal Shock Resistance, points 16
21 to 28