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Borosilicate Glass vs. ASTM B780 Alloy

Borosilicate glass and ASTM B780 alloy belong to fundamentally different material chemistries. Borosilicate glass is a ceramic material, while ASTM B780 alloy is a metal. Therefore, their performance will be even more dissimilar than would be suggested by the difference in properties. There are 11 material properties with values for both materials. Properties with values for just one material (23, 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 ASTM B780 alloy.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67 to 80
83
Poisson's Ratio 0.21
0.36
Tensile Strength: Ultimate (UTS), MPa 280
330 to 590

Thermal Properties

Specific Heat Capacity, J/kg-K 830
270
Thermal Expansion, µm/m-K 3.3 to 5.1
18

Otherwise Unclassified Properties

Density, g/cm3 2.2 to 2.6
10

Common Calculations

Stiffness to Weight: Axial, points 15 to 17
4.5
Stiffness to Weight: Bending, points 55 to 61
14
Strength to Weight: Axial, points 30 to 35
9.1 to 16
Strength to Weight: Bending, points 36 to 43
11 to 15
Thermal Shock Resistance, points 50 to 91
16 to 29