pyrex glass:

Thermal properties

  Maxiimun working temperature: 

                           Short-term(10h)  500

                           Long-term(10h) 450

Viscosity of Glasses

Working point                          10⁴dpas             1270

Softening point                        10^7.6dpas            820

Annealing point                        10¹³dpas             560

Strain point                           10^14.5dpas            518

Transformation Temperature(Tg0                             525

RTG

 1 hour   110K

 1-100hour  90K

 100hour  80K

Glass Thickness             RTS

3.8mm                               175K

5.0-5.5mm                             160K

6.5-12.0mm                            150K

Technical Properties

Density25            2.3g/cm³

Youngs Modulus     E     63kn/mm³                                JC/T678-1997

Poissons Ratio     u     0.18                     JC/T678-1997

Bending strength           59.3MPa                  JC/T678-1997

Hardness             H     6                        GB/T16534-1996

Thermal  Properties

Coefficient of Linear Thermal   α   20-300             3.3*10^-6k^-1

Thermal conductivity            λ(90)                  1.2W*(M*K)^-1

Specific Heat Capacity          Cp(20-100)              0.83K1*(kg*k)^-1

Chemical Resistance

Hydrolytic resistance      according ISO 719/DIN 12 111      HGB  1

                       According ISO 720               HGA   1

Acid  resistance         according  ISO 1776/DIN 12 116     1

Alkali resistance          according  ISO 695/DIN 52 322     A 2

Optical  Properties

Wavelength λ(nm)     435.8     479.9      546.1      589.3      643.8       656.3

Index of Refraction n  1.48023  1.47685(nF)  1.47326(ne)  1.47145  1.46975(nc)   1.46925

Refractive index           nd(λ587.6nm)              1.47178

Panel size 1200*750mm 2000*800mm we will be happy to provide other sizes upon request

Test method: Plates of approximately 20*20cm2 are heated in an oven with recirculated air and then doused in the center with 50ml of room temperature water,at which5%of the samples suffer breakage. The plates are abraded before heating with 220 grit sandpa-per to simulate typical surface condition during practical use .