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Borosilicate Glass

Borosilicate Glass

Material: Schott Duran
ROHS & REACH compliant

Physical properties density 2.23 g/cm3
  composition SiO2 81%
    B2O3 13%
    Na2O + K2O 4%
    Al2O3 2%
  max working temperature 300 to 400 °C
     
Thermal properties melting point (fusion) 1252°C
  softening point (ramollissement) 821 °C
  annealing point(recuit) 555 °C
  shock resistance 300°C
  strain point (contrainte) 510 °C
     
Mechanical properties hardness (dureté) 418 kg/cm2  ou Knoop 418
  Poisson’s ratio 0.20
  young’s modulus (élasticité) 63 kg/cm2 ou 0.658 GPa
  compressive strenght (résistance à la compression) 9327 kg/cm2  ou 3600 bars
  tensile strength (résistance à la tension) 832 kg/cm2 ou 142 bars
     
Chemical properties acid resistance   loss 0.10 mg/l
  alkali resistance  loss 140 mg/l
  water resistance loss 0.09 mg/g
     
     
Optical properties refraction index 1.474 nm (586.3nm)