怀来天元特种玻璃有限公司LOGO 简体中文 | EngLish
 
 

1.Normal Sizes(OD*W (mm)) 

  For heavy wall :
  44*4.0, 19*2.4, 28*4.0, 32*4.0,
  32*4.0, 32*3.2, 38*3.8, 38*4.0,
  51*4.0, 38*3.2, 51*4.8, 51*4.8,
  44*4.0, 38*4.0,51*4.8
  For light wall
 :
  10*1.5, 12*2.2, 13*1.8, 16*1.2, 
  7*1.5,   8*1.5,   9*2.0,   10*1.5,
  12*2.0, 12*2.2, 18*1.8,   9*2.0


2.Main Composition

  a) SiO2: 80±0.5%

  b) B2O3:13±0.2%

  c) Al2O3:2.4±0.2%

  d) Na2O(+K2O):4.3±0.2%

3.Physical and Chemical Properties

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

  b) Transformation temperature: 525±15℃

  c) Melting point::1,260±20℃

  d) Softening point:820±10℃
  e) Density at 20℃:2.23g/cm2

  f) Hydrolytic resistance at 98℃: ISO719-HGB1

  g) Hydrolytic resistance at 121℃: ISO720-HGA1

  h) Acid resistance class:ISO1776-1

  i) Alkali resistance class:ISO695-A2

 
 
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