Tag Archives: Fully tempered glass

Spontaneous glass breakage (or not)

The use of fully tempered (FT) glass is common in the building industry. While its increased strength (approximately four times stronger than annealed glass and twice as strong as heat strengthened) and distinctive breakage pattern that can reduce the potential for injury are regarded as benefits, its use should be carefully considered.

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Fully tempered glass and spontaneous fracture

Fully tempered glass offers designers certain advantages over annealed and heat-strengthened glass, including increased strength to resist imposed loads and thermal stresses, as well as a characteristic breakage pattern in a “relatively safe” manner; however, these features come at the cost of increased optical distortion and an often overlooked risk of spontaneous breakage in-service due to nickel sulfide inclusions.

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