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Crystal Glass

Crystal Glass

Material: high lead glass
ROHS: contains ≈ 30% lead

Physical properties density 3.20 g/cm3
  colour colorless
  composition Pb 30%
    other ingredients not communicated
  max working temperature 258 °C
     
Thermal properties strain point (contrainte) 430°C
  softening point (ramollissement) 477 °C
     
Mechanical properties hardness (dureté) 545  kg/cm2 
  young’s modulus (élasticité) 5.9*105 kg/cm2
  compressive strength (résistance à la compression) 7910 kg/cm2 
  tensile strength (résistance à la tension) 580 kg/cm2
     
Optical properties refraction ne 1.58