tempered glass

Thermally toughened glass

Through the heat curing process, the base layer of glass pane 3 is given excellent characteristics. Firstly, the thermally cured glass pane acquires four to five times the tensile strength of glass of the same thickness without additional heat treatment and can therefore withstand much higher mechanical stresses. 


Also, the heat treatment hardening process makes the glass more resistant to extreme, short term changes in high and low temperatures, and at the same time more able to withstand large temperature differences within its mass. 


However, if failure occurs due to high loads, then the glass pane will shatter into a mass of non-sharp, loosely bonded pieces, which pose less of a threat of injury than the sharp, large breakage pieces of a glass pane without additional heat treatment.

The basic physical properties of the thermally toughened glass, such as thermal conductivity, light and energy transmittance, thermal expansion and modulus of elasticity, remain identical to those of the base plane glass, as well as the weight, sound reduction index and chemical properties.
The thermally toughened glass pane is resistant to impact from flexible objects such as the human body, according to the harmonized standard ELOT EN 12600. The relevant scope also specifies the required minimum thickness of the glass pane.
Thermally toughened glass is capable of withstanding temperatures exceeding 300⁰C for short periods of time and temperatures exceeding 250⁰C for extended periods of time. The resistance to temperature differences within the thermally toughened glass is very high - withstanding up to 200K of temperature difference - compared to 40K of basic flat glass without additional heat treatment.

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