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Borosilicate Glass vs. EN 1.4594 Stainless Steel

Borosilicate glass and EN 1.4594 stainless steel belong to fundamentally different material chemistries. Borosilicate glass is a ceramic material, while EN 1.4594 stainless steel 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 (30, 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 EN 1.4594 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 67 to 80
200
Poisson's Ratio 0.21
0.28
Tensile Strength: Ultimate (UTS), MPa 280
1020 to 1170

Thermal Properties

Maximum Temperature: Mechanical, °C 360
820
Melting Onset (Solidus), °C 560
1410
Specific Heat Capacity, J/kg-K 830
470
Thermal Conductivity, W/m-K 1.2
16
Thermal Expansion, µm/m-K 3.3 to 5.1
11

Otherwise Unclassified Properties

Density, g/cm3 2.2 to 2.6
7.9

Common Calculations

Stiffness to Weight: Axial, points 15 to 17
14
Stiffness to Weight: Bending, points 55 to 61
25
Strength to Weight: Axial, points 30 to 35
36 to 41
Strength to Weight: Bending, points 36 to 43
29 to 31
Thermal Diffusivity, mm2/s 0.54 to 0.63
4.4
Thermal Shock Resistance, points 50 to 91
34 to 39