We know that the theoretical strength of glass is high than before actual two orders of magnitude, tempered glass windows, it is possible to improve the mechanical properties of the glass by heat treatment. Refers to the heat treatment of the glass at the glass transition temperature and the heat treatment temperature between the softening carried out. In the heat treatment process, structure and properties of the glass tends to occur a significant change, the glass transition from one state to another, with the glass composition can have very different properties. The distribution of stresses in glass two tempered glass surface compressive stress, tensile stress in the core plate, the glass thickness of the stress distribution is similar to a parabola. Central Glass thickness is vertex of the parabola, the tensile stress is greatest; both sides close to the glass surface compressive stress; zero stress surface at about the 1/3 thickness. By analyzing the physical processes steel quenching, we can see the inside glass surface tension and the maximum tensile stress has roughly proportional to the value that tensile stress is compressive stress of 1 / 2-1 / 3. Domestic manufacturers generally tempered glass surface tension will be set at about 100MPa, the reality may be higher. Toughened its tensile stress is about 32MPa ~ 46MPa, Zaozhuang glass, the tensile strength of glass is 59MPa ~ 62MPa, 8mm tempered glass, nickel sulfide expansion as long as the tension generated in 30MPa, it is enough to trigger a self-destruct. If it reduces the surface stress, and accordingly will reduce the glass their own tensile stress, thus helping to reduce the incidence blew. American Standard ASTMC1048 range specified in the tempered glass surface stress greater than 69MPa; semi-tempered (thermally enhanced) glass is 24MPa ~ 52MPa. Standard BG17841 glass curtain wall is defined as half the steel stress range 24 <; δ≤69MPa. The new national standard GB15763.2-2005 implementation of China's "architectural safety glass - Part 2: glass" which the surface stress of not less than 90MPa. This is better than the old standard set forth in the 95MPa reduced 5MPa, it helps to reduce blew. Glass door, Zaozhuang tempered glass, glass factory direct Yaohui provided by Jinan Glass Co., Ltd. Yaohui. Jinan Yaohui Glass Co., Ltd. (www.jyhhc.com/) strong, credible, in Jinan, Shandong architectural glass industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Jinan Yaohui into the brilliant glass and you work for a better future!