Soda-lime Glass vs. Tempered Soda-lime Glass
Tempered soda-lime glass is a variant of soda-lime glass. The properties of the parent material encompass the values of all of its variants.
For each property being compared, the top bar is soda-lime glass and the bottom bar is tempered soda-lime glass.
Metric UnitsUS Customary Units
Mechanical Properties
| Elastic (Young's, Tensile) Modulus, GPa | 70 to 71 | |
| 70 |
| Knoop Hardness | 570 | |
| 570 |
| Poisson's Ratio | 0.23 | |
| 0.23 |
| Shear Modulus, GPa | 29 | |
| 29 |
| Tensile Strength: Ultimate (UTS), MPa | 41 to 180 | |
| 180 |
Thermal Properties
| Maximum Temperature: Mechanical, °C | 300 | |
| 300 |
| Specific Heat Capacity, J/kg-K | 720 to 800 | |
| 720 |
| Thermal Conductivity, W/m-K | 1.0 to 1.1 | |
| 1.1 |
| Thermal Expansion, µm/m-K | 8.8 to 9.0 | |
| 9.0 |
Electrical Properties
| Dielectric Constant (Relative Permittivity) At 1 MHz | 7.3 to 7.4 | |
| 7.3 |
| Dielectric Strength (Breakdown Potential), kV/mm | 13 | |
| 13 |
Otherwise Unclassified Properties
| Density, g/cm3 | 2.4 | |
| 2.4 |
| Light Transmission Range, µm | 0.35 to 2.5 | |
| 0.35 to 2.5 |
| Refractive Index | 1.5 | |
| 1.5 |
Common Calculations
| Stiffness to Weight: Axial, points | 16 | |
| 16 |
| Stiffness to Weight: Bending, points | 56 | |
| 56 |
| Strength to Weight: Axial, points | 4.6 to 20 | |
| 20 |
| Strength to Weight: Bending, points | 11 to 28 | |
| 28 |
| Thermal Diffusivity, mm2/s | 0.51 to 0.6 | |
| 0.6 |
| Thermal Shock Resistance, points | 4.7 to 20 | |
| 20 |