Float glass is a very fragile material. Due to heat treatment, the internal stresses within its structure change, which causes an increase in its bending strength and resistance to fracture.
ALUMALL carries out the following types of glass heat treatment:
Tempered glass – the glass subjected to special heat treatment, as a result of which it obtains the increased thermal and mechanical durability with a safe form of destruction.
Heat-strengthened glass – the glass, which has passed special heat treatment due to which its thermal and mechanical durability becomes higher than float glass not as tempered glass.
Heat Soak Test (HST) — any tempered glass, due to the presence in its chemical composition of nickel sulphide inclusions (NiS), has a probability of spontaneous fracture. In order to minimize the possibility of glass self-destruction, tempered glass can be subjected to a special additional procedure Heat Soak Test, which consists in the many-hour aging of already tempered glass in a special chamber at a temperature of 290 ° С. Thus, HST – the test for the accelerated glass again. It’s carried out to reveal NiS inclusions which are the reason of glass spontaneous destruction. If it is necessary to carry out HST, it must be ordered simultaneously with the order of tempered glass.
assortment of alumal tempered glass
Single-pane glazing In the composition of laminated glass In the composition of the IGU Bent tempered glass Bent tempered glass in the composition of laminated glass Bent tempered glass in the composition of IGU
ALUMALL tempered glass advantages:
Glass durability on a strike is higher than float glass in 5-6 times, on a bend – in 2-3 timesThermal shock exclusion at
change of temperature from -150 °C to + 300 °CDestructed it breaks up to safe pieces – small splinters with the dulled sides: 1-10 mmThe highest rate of a light transmission among variations of a safe glazingHigh resistance to vibration influences
ALUMALL heat-strengthened glass advantages:
Glass durability on a strike is higher than float glass in 3-4 times, on a bend – in 1.5-2 timesThermal shock exclusion at change of temperature within 100 °CLess expressed anisotropyHeat Soak Test isn’t required as such glass isn’t subjected to spontaneous destructionUnlike tempered, destructed the heat-strengthened glass crack so that the isolated splinters aren’t formed, and big splinters are kept in a frame.
Glass for production ALUMALL tempered and heat-strengthened glass: