Technical definition

The method use to produce tempered glass is the Heat treating : Where the annealed glass is subjected to a special heat-treatment in which it is heated to about 680°C and afterwards cooled. If it is cooled rapidly, the glass is up to four times stronger then annealed glass and its breaks into many small fragments (fully-tempered). If it is cooled slowly, the glass is twice as strong as annealed glass and the fragments of the broken glass are linear and more likely to remain in the frame.

The heat treating process produces highly desirable conditions of induced stress (described below) which result in additional strength, resistance to thermal stress, and impact resistance.

Properties

Mechanical : Tempered glass has an impact strength which is 5 times higher than that of the annealed flat glass of the same thickness, as well as 3 to 4 times higher resistance to weight.
Thermal : The tempered glass can withstand quick temperaure change; for example, tempered glass of 5 mm thickness can tolerate a temperature change of 250°C.
Tempered glass possesses the basic optical qualities of annealed glass .
Ces caractéristiques permettent aux produits trempés d’être équipés de pièces métalliques de fixation ou de rotation et dans certains cas, de participer à la tenue mécanique de l’installation.
On rare occasions when tempered glass in these applications fails, it may fail completely from the opening, individual fragments from tempered glass are relatively small and harmless.
Tempered glass cannot be cut or modified following heat treatment.

Our last purchase : glass-tempering furnace, enables us to treat thicknesses from 3 mm to 25 mm.
The glass density is 2.5.

Tolerances :
Tolerance on Thickness : Clear and tinted glass

Tolerance on dimensions of congestion :
+ 0 mm
- 3 mm

Edge work tolerance (holes) :
- On dimensions : D.< 50 mm. 0 + 1 mm. D = 50 à 100 mm : 0 + 2 mm
- On positioning : ± 1.5 mm (TS. diameters)

Edge work tolerance (notches) :
- On dimensions : 0 + 2 mm
- On positioning : ± 2.5 mm