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              Difference between strengthened glass and tempered glass

              Author: Pv:347 Time:2021-07-22

                Strengthened glass and tempered glass have good wind pressure resistance, cold and heat resistance, impact and other properties. Of course, the manufacturing process between them is different, and the specific performance is naturally different. Next, I will introduce the difference between strengthened glass and tempered glass.

              Difference between strengthened glass and tempered glass

                Tempered glass is a kind of safety glass. As a kind of prestressed glass, the strength of tempered glass is much higher. Both chemical and physical methods are to better form compressive stress on the surface, so as to withstand the surface stress caused by external forces and improve the bearing capacity to a greater extent. Strengthened glass and tempered glass have good wind pressure resistance, cold and heat resistance, impact and other properties. Of course, the manufacturing process between them is different, and the specific performance is naturally different. Next, I will introduce the difference between strengthened glass and tempered glass

                Difference between strengthened glass and tempered glass

                1. Strengthened glass (also known as semi tempered glass) is a variety between ordinary flat glass and tempered glass. Its strength is higher than ordinary glass, but lower than tempered glass, and its image distortion is better than tempered glass. However, it should be noted that the reinforced glass does not belong to the scope of safety glass. Once it is broken, there are still sharp fragments to hurt people. The surface pressure of the reinorced glass should be between 25MPa and 52Mpa. Therefore, when purchasing glass products, we must ask clearly whether the business is tempered glass or reinforced glass.

                2. Strengthened glass is a general term for glass products with good mechanical properties and heat shock resistance after strengthening treatment. The strengthening methods include quenching, surface ion exchange, surface crystallization, acid treatment, coating, sulfur frosting and thermal neutron irradiation. Generally speaking, tempered glass refers to flat glass products treated by air quenching. It has high flexural strength, mechanical impact and thermal shock resistance. After crushing, the fragments do not have sharp edges and corners to reduce the damage to people. Toughened glass cannot be processed by mechanical cutting, drilling, etc. It is mainly used for cars and other transportation vehicles as well as doors and windows of buildings.

                3. Tempered glass is actually a kind of prestressed glass. Usually, chemical or physical methods are used to form compressive stress on the glass surface. When the glass bears external force, it first offsets the surface stress, so as to improve the bearing capacity and improve the tensile strength of the glass. There are two main advantages of tempered glass: first, the strength is several times higher than that of ordinary glass, the bending strength is 3-5 times higher than that of ordinary glass, and the impact strength is 5-10 times higher than that of ordinary glass. While improving the strength, it also improves the safety. Another advantage is that its bearing capacity can better improve the fragile property. Even if the tempered glass is damaged, it is a small fragment without acute angle, and the damage to human body is also reduced. The quench and heat resistance of tempered glass is 2-3 times higher than that of ordinary glass, and the pressure resistance of the surface is increased to 69mpa. Generally, it can withstand the temperature change above 150 ℃, which has an obvious effect on preventing thermal cracking. However, due to the special technical process adopted in the process of glass re tempering, the flatness of the surface will be slightly worse than that of flat plate and reinforced glass.

                4. Tempered glass is to heat the glass and then cool it rapidly (a bit like metal quenching), so that there is a great tensile stress in the glass and a greater compressive stress on its surface. Its function is the same as that of prestressed reinforced concrete components using tensile reinforcement to produce compressive stress in the part to be strengthened. The difference is that prestressed reinforced concrete produces compressive stress only in some areas, while tempered glass produces compressive stress on all surfaces. The hardening process of glass is also different from that of metal surface quenching. The toughening treatment of glass does not harden the glass surface, so the surface anti scratch and scratch ability has not been significantly improved after glass toughening.


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