Borosilicate 4.0 Fire Resistant Glass for High-Temperature Applications

What Is High Borosilicate 4.0 Fire Resistant Glass?

High borosilicate 4.0 fire resistant glass is a special flat glass developed for applications requiring good resistance to high temperatures and thermal shock. Its coefficient of thermal expansion is approximately 4.0 × 10⁻⁶/K, which is significantly lower than ordinary soda-lime glass.

This product is also called high borosilicate 4.0 glass, borosilicate 4.0 fire glass, high temperature resistant glass, or fire resistant borosilicate glass.

The low thermal expansion is one of its most important properties, helping the glass remain stable when exposed to rapid temperature changes.

Main Properties

· Coefficient of thermal expansion: approximately 4.0 × 10⁻⁶/K

· Excellent thermal shock resistance

· Good resistance to high temperatures

· Low thermal expansion

· Good chemical resistance

· High transparency

· Smooth and flat glass surface

· Can be cut, edge-ground, drilled and further processed

Why Is the 4.0 Thermal Expansion Coefficient Important?

When glass is heated, it expands. A lower coefficient of thermal expansion means the glass undergoes less dimensional change as temperature increases.

For high borosilicate 4.0 glass, the thermal expansion coefficient of around 4.0 × 10⁻⁶/K provides good resistance to thermal stress. This makes it suitable for applications involving flames, high temperatures, rapid heating and cooling, or repeated thermal cycling.

Typical Applications

High borosilicate 4.0 fire resistant glass is commonly used where both heat resistance and clear visibility are required.

Common Uses

Depending on the application, customers may search for this material using terms such as fireplace glass door, wood stove glass, heat resistant glass sheet, or high temperature glass rather than the technical term “borosilicate 4.0 glass.”

High Borosilicate 4.0 vs. Ordinary Glass

The main advantage is thermal stability. Ordinary soda-lime glass generally has a much higher thermal expansion coefficient, so sudden temperature changes can create greater thermal stress.

With its approximately 4.0 × 10⁻⁶/K coefficient of thermal expansion, high borosilicate 4.0 glass is better suited to demanding thermal environments.

However, the final glass specification should be selected according to the working temperature, glass size, thickness, installation structure and thermal conditions of the application.

Borosilicate 4.0 Glass Manufacturer in China

Jinan JSV Industrial Co., Ltd. supplies high borosilicate 4.0 fire resistant glass for fireplaces, wood stoves, industrial equipment, furnaces and other high-temperature applications.

Different thicknesses, sizes and edge-processing options can be provided according to customer requirements.

If you are looking for a high borosilicate 4.0 glass manufacturer or supplier in China, or need a suitable fire resistant glass sheet for your equipment, please contact Jinan JSV Industrial Co., Ltd. for specifications and quotation.