The properties of the glass are as follows:

Features:

1. Main composition:

   1) SiO₂: 80±0.5%

   2) B₂O₃: 13±0.2%

   3) Al₂O₃: 2.4±0.2%

   4) Na₂O (+K₂O): 4.3±0.2%

2. Chemical properties:

   1) Coefficient of mean linear thermal expansion (20°C / 300°C):3.3±0.1 (10-6K-1)

   2) Transformation temperature: 525± 15°C

   3) Working point: 1,260± 20°C

   4) Softening point: 820± 10°C

   5) Density at 20°C: 2.23g /cm³;

   6) Hydrolytic resistance at 98°C: ISO719-HGB1

   7) Hydrolytic resistance at 121°C: ISO720-HGA1

   8) Acid resistance class: ISO1776-1

   9) Alkali resistance class: ISO695-A2

It is excellent used in chemical laboratory equipment, cookware, lighting, and in certain cases, windows for its superior durability, chemical and heat resistance.

Our regular stocked size (diameter X thickness) of tube is: 19x3mm, 25x4mm, 32x3.2mm, 32x4mm, 38x3.2mm, 38x4mm, 44x4mm, 51x4mm, 51x4.8mm with the length 1220mm. We also can customize unconventional specifications according to your demand: outside diameter of 3.5-300mm, wall thickness 0.8-12mm, length 3000 millimeters (only for the small outside diameter tube).

The available colors are: red, opaque black, transparent black, pink, light/dark blue, yellow, amber, green, purple, and clear.

Terms of Payment: T/T, L/C at sight

Supply Ability: 10,000MT/year

Delivery Lead Time: 20 days

Packing: carton and pallets