ROBER TEMPER HST (HEAT TEMPERED GLASS)
Characteristics: HIGH RESISTANCE TO FLEXURE
Description
Rober Temper glass has undergone a thermal treatment to increase resistance to mechanical and thermal stress. This procedure consists in a rapid heating of the pane to a temperature of 640°C ca. followed by rapid cooling. The rapid cooling process causes the hardening of the superficial layers, leaving the interior warm for a longer period. The subsequent cooling of the central part produces a compression stress on the glass surface, balanced by the easing of tension on the interior, conveying a resistant quality of tempered glass. Not all types of glass can be tempered. For example, if they have intricate forms or numerous holes, they may break during the tempering procedure, due to internal stress on the material. Tempered glass is about 6 times more resistant than float glass, with a resistance to flexure of at least 120 MPa circa.
It is also considered safety glass since it has the tendency to break up into tiny pieces
Another procedure called the Heat Soak Test can be done to reduce the presence of eventual spontaneous breakage. This test consists of a heating cycle that maintains the temperature of the panes at about 300°C; it is often done to accelerate the breakage of tempered panes that would tend to break spontaneously. The test allows the elimination of 99% of the panes that would break in the process.
Applications
Tempered glass can be used for the realization of elements without a supporting structure, such as doors without metallic frames, or in structural applications.
Rober Temper HST can be used both in construction and interior decorating: doors and windows, canopies, continuous façades, stairways, railings, and numerous other structures.
Dimensions
Thickness from 4 to12 mm
Maximum dimension 3000x1800 mm
Technical parameters on Pilkington OPTIFLOAT base
![]() Technical parameters OPTIWHITE – Pilkington ![]() Technical parameters K GLASS ![]() ![]() |
Key
|
N.B. Rober Glass can emit the CE trademark on Pilkington glass, where initial type tests have been conducted: therefore, it is possible, when dealing with large orders, to begin the marking process for the product requested by the client. Should the glass be delivered to Rober Glass for workmanship purposes, the client must provide documentation regarding the origin of the material.