Borosilicate Glass vs. Tempered Soda-lime Glass
Both borosilicate glass and tempered soda-lime glass are glass and glass-ceramics. There are 19 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.
For each property being compared, the top bar is borosilicate glass and the bottom bar is tempered soda-lime glass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 67 to 80 | |
| 70 |
| Knoop Hardness | 510 | |
| 570 |
| Poisson's Ratio | 0.21 | |
| 0.23 |
| Tensile Strength: Ultimate (UTS), MPa | 280 | |
| 180 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 360 | |
| 300 |
| Specific Heat Capacity, J/kg-K | 830 | |
| 720 |
| Thermal Conductivity, W/m-K | 1.2 | |
| 1.1 |
| Thermal Expansion, µm/m-K | 3.3 to 5.1 | |
| 9.0 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 5.4 | |
| 7.3 |
| Dielectric Strength (Breakdown Potential), kV/mm | 5.0 to 34 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.2 to 2.6 | |
| 2.4 |
| Light Transmission Range, µm | 0.3 to 2.5 | |
| 0.35 to 2.5 |
| Refractive Index | 1.5 | |
| 1.5 |
Common Calculations
| Stiffness to Weight: Axial, points | 15 to 17 | |
| 16 |
| Stiffness to Weight: Bending, points | 55 to 61 | |
| 56 |
| Strength to Weight: Axial, points | 30 to 35 | |
| 20 |
| Strength to Weight: Bending, points | 36 to 43 | |
| 28 |
| Thermal Diffusivity, mm2/s | 0.54 to 0.63 | |
| 0.6 |
| Thermal Shock Resistance, points | 50 to 91 | |
| 20 |