Heat Resistant Glass Types

Heat Resistant Glass Defined
Heat-resistant glass is commonly consisting of a soda lime or silica that is a heat-resistant material, with a very low expansion coefficient and a high melting point. Heat resistant glass is a type of glass that is designed to resist thermal shock. This glass is believed to be better than any other ordinary glass available. This type of glass is generally used in kitchens and in industrial applications. It has been tested to withstand temperature changes of up to 1000-degrees Celsius, which is the equivalent to 1,832 degrees Fahrenheit. Yet, ordinary glass would easily shatter if exposed to that extensive level of high temperature. The following are some source to choose from.

Chemically Tempered Glass
A hardening process primarily used for thin soda lime based glass. It creates a tougher surface without any internal stress, which helps keep the flatness. Generally it will increase the base glass strength by a factor of three. This is not a safety glass and can be fabricated afterward without it breaking into fine pieces. We use this for instrument windows as well as certain optical glasses.

• 450°F
• Available in .020" to 1/8" thick
• Specially designed for thin glass

Pyrex® Glass

• 450°F - 914°F
• Available in .020" to 21/4" thick
• Colors in blue, amber, red, IRR, solite pattern, rolled or polished surfaces
• Used for fireplace glass, high temperature light lenses and ovens
• Can be tempered

Pyroceram® Glass

• 1300°F - 1427°F
• .020"thick
• Colors in clear or white
• Used for fireplaces and wood burning stove windows, oven/broiler windows, cooking tops and other such appliances

Quartz Glass = Dynasil® IRQ | Dynasil® Low OH IR | GE214 Fused Quartz | Homogenity

• 1700°F - 2200°F
• Colors in clear with rolled or polished surfaces
• Used in high temperature areas where low expansion is needed
• Made to order

Robax® Glass

• -400°F - 1400°F
• Available in .118" to .197"thick
• Myriad of Colors - brocade, amber gold, carbon black, anthracite, lava black, celtic gray, satin silver, polar white, gold topaz and copper
• Myriad of Textures
• Used for fireplaces and wood burning stove windows, oven/broiler windows

Tempered Glass
Tempered (toughened) glass is two or more times stronger than annealed glass. When broken, it shatters into many small fragments which prevent major injuries. This type of glass is intended for glass façades, sliding doors, building entrances, bath and shower enclosures and many other uses requiring superior strength and safety properties.

• 450°F
• Available in 1/8" to 1" thick
• Colors in clear, low iron, grey, bronze, blue, green, cobalt blue, acid-etched and patterned glass

Vycor® Glass (Out or melt) = Comparable to those of Quartz Glass (see above) and Fused Silica

• 1700°F - 2200°F
• Available in 1/8" to 3/4" thick
• Colors in clear with rolled or polished surfaces
• Used for coal burning stoves