Tempered glass and Semi-tempered glass

Created on 2024.10.29

Tempered glass: by heating ordinary glass to close to the softening point after rapid cooling, so that the surface of the glass formed a strong compressive stress, and the internal tensile stress, which greatly enhance the impact resistance and thermal stability of the glass‌.

Semi-tempered glass: through high temperature and quenching treatment, the surface layer of compressive stress is lower than 69 MPa, the internal stress is lower than tempered glass, the manufacturing process is similar to tempered glass, but the cooling rate is slower.

1、Performance feature

1) Tempered glass

‌            Strength: It is 4-5 times of ordinary glass, broken into small particles, reduce the harm to the human body ‌.‌   

            Safety: Tempered glass has good thermal stability and weather resistance, can withstand a large temperature difference (about 180°C) ‌.‌   

            Disadvantages: easy to self-explosion, poor flatness‌.

2) Semi-tempered glass‌   

   Strength: It is more than 2 times of ordinary glass, broken with obtuse Angle large block, relatively safer ‌.‌   

   Safety: When broken, the fragments are radial and not easy to fall off, but they do not belong to safety glass.‌  

    Thermal stability ‌: It can withstand small temperature difference (about 75°C) ‌.

2、Application

    Tempered glass often used in the need of high security occasions, such as high-rise buildings, sports venues, car Windows.

    Semi-tempered glass is suitable for buildings that do not withstand strong impact, such as glass partitions, doors and Windows, because of its lower cost but higher safety.

3、Cost and maintenance

     Tempered glass: High cost, suitable for high safety requirements.

    Semi-tempered glass: The cost is relatively low, suitable for the occasions where the cost is required.

In summary, tempered glass and semi-tempered glass have advantages and disadvantages in the manufacturing process, performance characteristics and application scenarios, and the selection should be considered according to specific needs.