Specifications:

• Young's modulusE: 82 x 103kN/mm2
• Thermal expansion coefficient: 7.1X10E-6/K
• The refractive index: 1.51680
• Surface: 60/40
• Strain point: 624
• Softening point: 719
• Shape: triangle
• Poisson's ratiou: 0.21
• Origin: CN(Origin)
• Mechanical properties: 2.51g/cm3
• Material: K9
• Knoop hardnessHK 100: 610kg/mm2
• Dimension Tolerance: 0.1-0.01
• Annealing temperature: 657
• Angle Tolerance: 3'
• Abbe number: 63.96