Heat Strengthened Glass

Heat Strengthened glass has about twice the mechanical and thermal strength of annealed glass of equal thickness. The color, clarity, chemical composition and light transmission characteristics of glass remain unchanged after heat strengthening. Heat Strengthened glass tends to break into large fragments, similar to annealed glass,

Properties

• Substantially reduced visible distortion in comparison to Tempered Glass.
• Heat strengthening glass can not be cut or drilled, sandblasted or etched, or edge polished or ground. Any fabrication or field alteration will weaken or break the glass.
• Tempered glass is subject to rare spontaneous breakage caused by one or a combination of these causes: surface or edge damage, deep scratches or gouges, severe weld spatter, missile or windborne debris impact, glass to metal contact, wind/thermal loading or rare inclusions or impurities in the float glass that weaken the compression layer of the glass. Breakage may occur long after the damaging event, seemingly for no apparent cause due to thermal or wind cycling. Because heat strengthened glass is produced with a lower level of compressive stress, it is even less likely to experience "spontaneous breakage".
• When tempered glass breaks, the resulting small pieces tend to vacate the framing system under lateral load. Heat strengthened glass are less likely to leave the framing system in the case of breakage and subsequent lateral load.
• Heat strengthened glass is supplied with a permanent mark in one corner identifying the manufacturer, SAFEX and the words heat strengthened.

Applications

• For applications where heat stress breakage is a concern (i.e. High performance glass, spandrels)
• For locations where glass fallout in the event of breakage is a concern
• For locations where safety glass is not required

Specification:

• Maximum Size : 2440mm x 3660mm
• Minimum Size : 300mm x 300mm Glass
• Thickness: 3.5mm - 19mm
• Glass Types: Clear, Tinted, Reflective, Low e, Figured