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Borosilicate Glass vs. C18700 Copper

Borosilicate glass and C18700 copper belong to fundamentally different material chemistries. Borosilicate glass is a ceramic material, while C18700 copper 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 (27, 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 borosilicate glass and the bottom bar is C18700 copper.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67 to 80
110
Poisson's Ratio 0.21
0.34
Tensile Strength: Ultimate (UTS), MPa 280
290 to 330

Thermal Properties

Maximum Temperature: Mechanical, °C 360
200
Melting Onset (Solidus), °C 560
950
Specific Heat Capacity, J/kg-K 830
380
Thermal Conductivity, W/m-K 1.2
380
Thermal Expansion, µm/m-K 3.3 to 5.1
17

Otherwise Unclassified Properties

Density, g/cm3 2.2 to 2.6
9.0

Common Calculations

Stiffness to Weight: Axial, points 15 to 17
7.1
Stiffness to Weight: Bending, points 55 to 61
18
Strength to Weight: Axial, points 30 to 35
9.0 to 10
Strength to Weight: Bending, points 36 to 43
11 to 12
Thermal Diffusivity, mm2/s 0.54 to 0.63
110
Thermal Shock Resistance, points 50 to 91
10 to 12