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Soda-lime Glass vs. 85-platinum 15-iridium

Soda-lime glass and 85-platinum 15-iridium belong to fundamentally different material chemistries. Soda-lime glass is a ceramic 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 (15, 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 soda-lime glass and the bottom bar is 85-platinum 15-iridium.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70 to 71
220
Poisson's Ratio 0.23
0.38
Shear Modulus, GPa 29
81
Tensile Strength: Ultimate (UTS), MPa 41 to 180
560 to 730

Thermal Properties

Specific Heat Capacity, J/kg-K 720 to 800
130
Thermal Expansion, µm/m-K 8.8 to 9.0
8.4

Otherwise Unclassified Properties

Density, g/cm3 2.4
22

Common Calculations

Stiffness to Weight: Axial, points 16
5.7
Stiffness to Weight: Bending, points 56
9.3
Strength to Weight: Axial, points 4.6 to 20
7.1 to 9.3
Strength to Weight: Bending, points 11 to 28
6.9 to 8.3
Thermal Shock Resistance, points 4.7 to 20
21 to 28