We make use of different strengthening processes in order to adapt glass, as a versatile, high-tech material, to its respective intended use.
Thermal tempering: Semi-tempered glass (STG)
STG is exposed to a thermal tempering process just like TSG. However, the cooling process is slower, which results in less of a tension difference in the glass between the center and the surface. The resistance to bending lies somewhere between that of standard float glass and tempered safety glass. If broken, the resulting pieces resemble those of normal, non-hardened float glass.
Properties of tempered glasses
|Properties||FLOAT Glass Untreated||TSG Tempered Safety Glass||STG Semi Tempered Glass||CSG Chemically Strengthened Glass|
|Stone impact resistance||No change||No change||No change||~ +40 %|
|Flexural strength||~ 45 N/mm²||~ 120 N/mm²||~ 70 N/mm²||> 150 N/mm²|
|Temperature shock resistance||~ 40 K||~ 150 K||~ 100 K||> 200 K|
|Appearance of fracture||Splitting||Friable structure||Splitting||Splitting|