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Borosilicate Glass vs. SAE-AISI M48 Steel

Borosilicate glass and SAE-AISI M48 steel belong to fundamentally different material chemistries. Borosilicate glass is a ceramic material, while SAE-AISI M48 steel 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 (24, 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 SAE-AISI M48 steel.

Borosilicate GlassSAE-AISI M48 (T11348) Cobalt High-Speed Steel
Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67 to 80
200
Poisson's Ratio 0.21
0.29
Tensile Strength: Ultimate (UTS), MPa 280
890 to 2390

Thermal Properties

Melting Onset (Solidus), °C 560
1620
Specific Heat Capacity, J/kg-K 830
420
Thermal Expansion, µm/m-K 3.3 to 5.1
12

Otherwise Unclassified Properties

Density, g/cm3 2.2 to 2.6
8.7

Common Calculations

Stiffness to Weight: Axial, points 15 to 17
13
Stiffness to Weight: Bending, points 55 to 61
22
Strength to Weight: Axial, points 30 to 35
28 to 76
Strength to Weight: Bending, points 36 to 43
23 to 45
Thermal Shock Resistance, points 50 to 91
26 to 71