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Is heat strengthened glass safety glass?

Yes and No. In order to strengthen standard float glass and make it more durable, a number of methods are used to increase the resistance to certain forces like the weather. It is worth noting that only some of these methods actually make this Glass officially Safety Glass, this requires a different process or combination of processes in order to make the glass stronger.

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Basic Heat strengthened glass is not a safety glass product as defined by any Australian standard and so it must undergo further processing like tempering to be classified Safety Glass

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Types of heat strengthened glass

  • Heat Strengthened
  • Tempered Glass

Both Heat Strengthened and Tempered glass go through the same basic process where glass is heated and then forced cooled to create the actual glass surface. Where tempering differs however is with the volume of glass used and the cooling process which is accelerated to create higher surface tension resulting in higher surface compression in the finished product.

Types of Safety Glass

  • Toughened / Tempered
  • Laminated Glass
  • Wire Mesh
  • Engraved

Typical Uses of Heat Strengthened Glass

Heat Strengthened Glass is intended for general glazing, where additional strength is desired to withstand wind load and thermal stress. Tempered Glass is used in a number of commercial products including:

  • Vehicle windows
  • shower doors
  • Tables
  • Mobile phone screens protectors
  • Bulletproof glass
  • Diving masks

Ref- https://en.wikipedia.org/wiki/Tempered_glass


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