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Borosilicate Glass vs. 4115 Aluminum

Borosilicate glass and 4115 aluminum belong to fundamentally different material chemistries. Borosilicate glass is a ceramic material, while 4115 aluminum 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 (29, in this case) are not shown.

For each property being compared, the top bar is borosilicate glass and the bottom bar is 4115 aluminum.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67 to 80
70
Poisson's Ratio 0.21
0.33
Tensile Strength: Ultimate (UTS), MPa 280
120 to 220

Thermal Properties

Maximum Temperature: Mechanical, °C 360
160
Melting Onset (Solidus), °C 560
590
Specific Heat Capacity, J/kg-K 830
900
Thermal Conductivity, W/m-K 1.2
160
Thermal Expansion, µm/m-K 3.3 to 5.1
23

Otherwise Unclassified Properties

Density, g/cm3 2.2 to 2.6
2.7

Common Calculations

Stiffness to Weight: Axial, points 15 to 17
14
Stiffness to Weight: Bending, points 55 to 61
50
Strength to Weight: Axial, points 30 to 35
12 to 23
Strength to Weight: Bending, points 36 to 43
20 to 30
Thermal Diffusivity, mm2/s 0.54 to 0.63
66
Thermal Shock Resistance, points 50 to 91
5.2 to 9.9