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Guangdong Glass Factory tells you what is the difference between tempered glass and semi-tempered glass

Release time:

Jul 25,2024

There are significant differences between tempered glass and semi-tempered glass in many aspects. The following is a detailed comparison of the differences between the two:

We are a tempered glass factory in Guangdong, which can provide you with the latest tempered glass prices. We also have the latest tempered glass processing technology and experienced tempered glass installation methods. Customer feedback that the tempered glass effect is very good.

There are significant differences between tempered glass and semi-tempered glass in many aspects. The following is a detailed comparison of the differences between the two:

Strength and compressive stress: tempered glass: through high temperature and quenching treatment, the glass surface layer forms a strong compressive stress, and its surface stress is 69 ~ 168Mpa. This treatment makes the mechanical strength of the glass several times, the strength is 4 times the strength of ordinary glass and more.

Semi-tempered glass: the same use of high temperature and quenching treatment, but the surface of the formation of compressive stress is less than 69MPa, the surface stress of 24 ~ 69Mpa. Its strength is more than 2 times that of annealed glass, but less than tempered glass.

Safety: Tempered glass: When damaged by external force, it will be broken into small particles similar to honeycomb obtuse angle, which is not easy to cause serious harm to the human body, and belongs to the category of safety glass. However, tempered glass has the disadvantage of being easy to explode.

Semi-tempered glass: When broken, the fragments are radial, and each fragment extends to the edge, which is not easy to fall off and is relatively safe. However, once it is broken, there are still sharp fragments that may hurt people, so it does not belong to the scope of safety glass.

Thermal shock and thermal stability: tempered glass: has good thermal stability, can withstand the temperature difference is 3 times that of ordinary glass, generally can withstand more than 250 degrees of temperature change.

Semi-tempered glass: thermal stability is also significantly better than annealed glass, ordinary glass after semi-tempered treatment can withstand the temperature difference of about 75°C.

Self-explosion phenomenon: tempered glass: due to its large surface stress, there is a risk of self-explosion.

Semi-tempered glass: low surface stress, there will be no self-explosion phenomenon.

Application areas:

Tempered glass: widely used in high-rise building doors and windows, glass curtain wall, indoor partition glass, lighting ceiling, etc.

Semi-tempered glass: It is suitable for curtain walls and exterior windows in buildings, and its image distortion is better than tempered glass. However, it should be noted that semi-tempered glass cannot be used for skylights and occasions where human impact may occur.

Production process: Both are treated by high temperature and quenching, but the wind pressure of semi-tempered glass in the quenching station is small, and the cooling speed is lower than that of tempered glass.

National standards and certification: tempered glass needs to pass the national compulsory (3C) certification, there are strict physical and chemical performance testing requirements.

Although semi-tempered glass also has performance requirements, it is not a mandatory requirement.

In summary, there are significant differences between tempered glass and semi-tempered glass in terms of strength, safety, thermal stability, self-explosion, application fields, manufacturing processes and national standards. The choice of which glass to use depends on the specific application scenario and safety requirements.

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