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Thermally Toughened: Performance


Thermally toughened glass:

  • Is highly resistant to thermal stress. It can withstand differences in temperature of approximately 200°C
  • Has a much higher level of mechanical strength and is more resistant to shocks than annealed glass. Thermally toughened glass is resistant to breakage due to bending of at least 120 N/mm²; for certain types of glasses, these values can be different (patterned glass 90 N/mm² and enamelled glass 75 N/mm²)
  • Breaks into small, blunt pieces as per the relevant requirements. Thermally toughened glass is always a safety glass in certain applications. Its usage always depends on the application and local regulations
  • Please contact your local supplier for the relevent classification
  • Toughenable Magnetron coatings should be toughened to achieve the desired performance (fragmentation, optical, Ug value)
  • The light, thermal and energy performance of thermally toughened glasses is exactly the same as that of the same annealed glass.


  • Edge finishing

    Toughened glasses can be supplied with several edge finishings such as:

    • Arrissed edges
    • Ground edges but some bright areas permitted
    • Ground edges but no bright areas
    • Polished edges

    In buildings, toughened glasses will be delivered with arised edges as standard but depending on the type of application, other finishings can be supplied on request.

  • Other possible finishings
    • Holes
    • Notches
    • Cutting

Glasses may be heat-treated to enhance their resistance to mechanical and thermal shocks.


Heat Strengthend Glass

Thermally Toughened Glass

Thermally Toughened HST Glass

Tempered glass table