Heat-Treated Glass
Description
Heat-treated glass forms when annealed architectural glass is heated to around 1,150°F in a tempering oven. We then rapidly cool both sides using high-pressure air, a process known as quenching. This creates permanent surface compression zones. As a result, the glass gains higher compressive strength and greater resistance to impact and thermal stress. There are two general categories of heat-treated glass, heat-strengthened glass and fully tempered glass, both of which Hartung produces in strict accordance with the requirements and tolerances outlined in ASTM C1048. Heat-strengthened glass is twice as strong as annealed glass. It is better suited to resisting thermal stresses and edge damage and features a breakage pattern that is more likely to be retained within a glazing frame in case that breakage occurs. Fully tempered glass is four times as strong as annealed glass. It too offers superior resistance against thermal stresses and edge damage, but its breakage pattern is more conducive to having glass fall out of a frame when breakage takes place. Because of that and how fully tempered glass breaks into small, relatively harmless pieces, it is classified by building codes as a suitable option where “Safety Glass” is required.
Why Choose Hartung?
Highest Quality Tempering Furnaces
Hartung employs a fleet of world-class tempering furnaces across the enterprise. Our tempering furnaces give us the ability to produce high-quality heat-treated glass products on a consistent basis.Oversize Capabilities
We carefully design our facilities and processes to produce oversized heat-treated glass without compromising quality or durability.Flatter Glass
Heat-treated glass naturally includes optical distortion. At Hartung’s commercial glass facilities, we closely monitor and control this distortion. Our team uses advanced optical distortion measurement equipment as a key part of the quality control process. As a result, Hartung consistently delivers optically flatter glass.Fast Glass
We have multiple shifts working around the clock to meet your schedule and your project needs. Ask your local Hartung partner about our expedited lead times for monolithic heat-treated glass products.Key Product Features
Meets Building Code Requirements
Using tempered glass can reduce the probability of serious injury in areas where human impact is probable. Architects and builders rely on safety glazing to meet code requirements in applications like shower doors, building entrances, glass railings, balustrades, vision areas, spandrel panels, and skylights.Improved Resistance Against Thermal Stress
Using heat-strengthened and tempered glass on your project gives you a building product that is more resilient against exposure to temperature extremes and differential shading conditions.Improved Resistance Against Shock
Where greater impact resistance is necessary, consider using heat-strengthened glass products. For any commercial glazing application, Hartung recommends the use of heat-treated glass.Improved Resistance to Loads
Heat treating glass increases its resistance to wind and snow loads. Improved performance plays a critical role in structurally-glazed glass applications.
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