What is the difference between heat-strengthened and fully tempered glass?
Both processes increase the strength of glass (tempered glass is about four times as strong as annealed glass of the same thickness and configuration; heat-strengthened glass is about twice as strong as annealed glass of the same thickness and configuration). NOTE: Heat-strengthening glass does not change the stiffness of the glass and the amount of deflection under load compared to annealed glass. How do I determine when to use heat-strengthened glass and when to use fully tempered glass? Fully tempered glass is more commonly used in safety glazing applications since its breakage pattern results in innumerable small fragments of more or less cubicle-shaped pieces of glass which may vacate the opening (Please check local code requirements for approval to use fully tempered glass as a safety glazing material.). Heat-strengthened glass is used in areas where fully tempered breakage patterns would not be desirable, such as in spandrel applications. Heat strengthened glass has a breakage p
