Properties | Tempered Glass | Heat strengthened glass | Annealed Glass |
Thermal stress | Upto 250ºC | Upto 130ºC | Upto 50ºC |
Strength | 4 times of annealed | 2 times of annealed | Not strong |
Bending strength | 120 - 200 N/mm² | 60 - 100 N/mm² | 40 N/mm² |
Design stress | 50 Mpa | 27 Mpa | 17 Mpa |
Surface compression | > 10000 psi (69 Mpa) | 3500-7500psi (24-52 Mpa) | Upto 2800 psi (19 Mpa) |
Safety | Appoved as safety glazing for most applications | Not approved as safety glazing | Not approved as safety glazing |
Site alterations | Not possible | Not possible | Possible |
Flatness | Slight bow and corrugation | Bow and corrugation lower than tempered glass | Very flat |
Optics | Reasonably good | Good. Comparatively better than tempered glass | Very good |
Lamination | Min 1.52 PVB | Mn 1.52 PVB | Min 0,38mm PVB |
NİS breakage | Prone | Extremely rare possibilty | Non existent |
Properties | Tempered Glass | Heat strengthened glass | Annealed Glass |
Thermal stress | Upto 250ºC | Upto 130ºC | Upto 50ºC |
Strength | 4 times of annealed | 2 times of annealed | Not strong |
Bending strength | 120 - 200 N/mm² | 60 - 100 N/mm² | 40 N/mm² |
Design stress | 50 Mpa | 27 Mpa | 17 Mpa |
Surface compression | > 10000 psi (69 Mpa) | 3500-7500psi (24-52 Mpa) | Upto 2800 psi (19 Mpa) |
Safety | Appoved as safety glazing for most applications | Not approved as safety glazing | Not approved as safety glazing |
Site alterations | Not possible | Not possible | Possible |
Flatness | Slight bow and corrugation | Bow and corrugation lower than tempered glass | Very flat |
Optics | Reasonably good | Good. Comparatively better than tempered glass | Very good |
Lamination | Min 1.52 PVB | Mn 1.52 PVB | Min 0,38mm PVB |
NİS breakage | Prone | Extremely rare possibilty | Non existent |
Properties | Tempered Glass | Heat strengthened glass | Annealed Glass |
Thermal stress | Upto 250ºC | Upto 130ºC | Upto 50ºC |
Strength | 4 times of annealed | 2 times of annealed | Not strong |
Bending strength | 120 - 200 N/mm² | 60 - 100 N/mm² | 40 N/mm² |
Design stress | 50 Mpa | 27 Mpa | 17 Mpa |
Surface compression | > 10000 psi (69 Mpa) | 3500-7500psi (24-52 Mpa) | Upto 2800 psi (19 Mpa) |
Safety | Appoved as safety glazing for most applications | Not approved as safety glazing | Not approved as safety glazing |
Site alterations | Not possible | Not possible | Possible |
Flatness | Slight bow and corrugation | Bow and corrugation lower than tempered glass | Very flat |
Optics | Reasonably good | Good. Comparatively better than tempered glass | Very good |
Lamination | Min 1.52 PVB | Mn 1.52 PVB | Min 0,38mm PVB |
NİS breakage | Prone | Extremely rare possibilty | Non existent |