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Soda-lime Glass vs. R30605 Cobalt

Soda-lime glass and R30605 cobalt belong to fundamentally different material chemistries. Soda-lime glass is a ceramic material, while R30605 cobalt is a metal. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 14 material properties with values for both materials. Properties with values for just one material (17, 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 R30605 cobalt.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70 to 71
210
Poisson's Ratio 0.23
0.29
Shear Modulus, GPa 29
81
Tensile Strength: Ultimate (UTS), MPa 41 to 180
1130 to 1900

Thermal Properties

Specific Heat Capacity, J/kg-K 720 to 800
410
Thermal Conductivity, W/m-K 1.0 to 1.1
9.6
Thermal Expansion, µm/m-K 8.8 to 9.0
12

Otherwise Unclassified Properties

Density, g/cm3 2.4
9.6

Common Calculations

Stiffness to Weight: Axial, points 16
12
Stiffness to Weight: Bending, points 56
21
Strength to Weight: Axial, points 4.6 to 20
33 to 55
Strength to Weight: Bending, points 11 to 28
25 to 36
Thermal Diffusivity, mm2/s 0.51 to 0.6
2.5
Thermal Shock Resistance, points 4.7 to 20
31 to 52