Tempered Glass (HY-003)
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- Model NO.: HY-003
- Appearance: Flat Tempered
- Steel Degree: Tempered Glass
- Thickness of Curve Tempered Glass: 19MM
- Technics: Physically Tempered
- Usage: Building, Furniture, Home Appliance, Electronics & Instruments, Auto Manufacturing, Daily Products
- Color: Clear and Tinted
- Thickness: 2mm-19mm
- Origin: China
- Shape: Flat
- Standard: GB/T 9963-1998
- Thickness of Flat Tempered Glass: 19MM
- Fragment State: I
- Flatness: High Class
- Type: Tempered
- Technique: Tempered Glass
- Transport Package: Shgipping Packing
- HS Code: 70071900
Toughened glass is used when strength, thermal resistance and safety are important considerations. The most commonly encountered tempered glass is that used for side and rear windows in automobiles, used for its characteristic of shattering into small cubes rather than sharp-edged shards. Tempered glass is also used in buildings for unframed assemblies (such as frameless doors), structurally-loaded applications, and any other application that would become dangerous in the event of a human impact.
Toughened glass is made from annealed glass via a thermal tempering process. The glass is placed onto a roller table, taking it through a furnace that heats it to above its annealing point of about 600 ° C. The glass is then rapidly cooled with forced draughts of air while the inner portion of the glass remains free to flow for a short time.
The term toughened glass is generally used to describe fully tempered glass but is sometimes used to describe heat strengthened glass as both types undergo a thermal 'toughening' process.
There are two main types of heat treated glass, heat strengthened and fully tempered. Heat strengthened glass is twice as strong as annealed glass whilst fully tempered glass is typically four to six times the strength of annealed glass and withstands heating in microwave ovens. The difference is the residual stress in the edge and glass surface. Fully tempered glass in the US is generally above 65 MPa whilst Heat Strengthened glass is between 40 and 55 MPa.
It is important to note that while the strength of the glass does not change the deflection, being stronger means that it can deflect more before breaking. Annealed glass deflects less than tempered glass under the same load, all else being equal.
Toughened glass must be cut to size or pressed to shape before toughening and cannot be re-worked once toughened. Polishing the edges or drilling holes in the glass is carried out before the toughening process starts.