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Tempered and heat-strengthened glass is obtained by heating ordinary glass to its softening point and then suddenly cooling down to form compression in the surface layer of the glass, thus the mechanical strength is increased by times.Features of tempered glass Safety: when broken, tempered glass becomes small granules, which prevent substantial hurt to human body. High strength: the strength of tempered glass is 4 to 5 times that of annealed glass. Thermal stability: tempered glass has excellent thermal stability, which can withstand up to 300°C thermal shock. Tempered glass is a kind of safety glass and is widely used in places which call for high mechanical strength and safety, such as glazed door, curtain wall, vertical window, partition wall, and partition screen close to heat source and subject to violent thermal shock. Features of heat-strengthened glass Heat-strengthened glass differs from tempered glass in its surface compression; its mechanical strength is about 1.6-2 times that of annealed glass. Heat-strengthened glass has outstanding thermal stability, and its flatness is close to that of annealed glass and better than that of tempered glass. SpecificationsDimensions(mm): Maximum dimension: 3000 x 8000 Minimum dimension: 100 x 250 Thickness (mm): Tempered glass : 4 - 19 Heat-strengthened glass : 4 -12 Quality Conforming to BS6206, the British standard Conforming to GB 15763.2, the Chinese standard. Conforming to GB17841-1999, the Chinese standard. Features of tempered glass Safety: when broken, tempered glass becomes small granules, which prevent substantial hurt to human body. High strength: the strength of tempered glass is 4 to 5 times that of annealed glass. Thermal stability: tempered glass has excellent thermal stability, which can withstand up to 300°C thermal shock. Tempered glass is a kind of safety glass and is widely used in places which call for high mechanical strength and safety, such as glazed door, curtain wall, vertical window, partition wall, and partition screen close to heat source and subject to violent thermal shock. Features of heat-strengthened glass Heat-strengthened glass differs from tempered glass in its surface compression; its mechanical strength is about 1.6-2 times that of annealed glass. Heat-strengthened glass has outstanding thermal stability, and its flatness is close to that of annealed glass and better than that of tempered glass. SpecificationsDimensions(mm): Maximum dimension: 3000 x 8000 Minimum dimension: 100 x 250 Thickness (mm): Tempered glass : 4 - 19 Heat-strengthened glass : 4 -12 Quality Conforming to BS6206, the British standard Conforming to GB 15763.2, the Chinese standard. Conforming to GB17841-1999, the Chinese standard.