BETOGLASS ® - Technical Data
(according to DIN 1249)


Density 2.5 g/cm
Young´s Modulus 7.3 x 104 N/mm 2
Pressure Resistance 700 - 900 N/mm 2
Bending Tensile Strenght (with Float) 30 N/mm 2
Bending Tensile Strenght (with toughened) 120 N/mm 2
Surface Roughness 0 - 0.0015 mm
Coeffifient of Thermal Expansion (longit.) 9.0 x 10-6 1/K
Specific Thermal Capacity 800 J/(kg x K)
Thermal Conductivity 0.8 W(m2 x K)
Thermal Shock Resistance (with float) max. +/- 60 K
Thermal Shock Resistance (with toughened) max +/- 100 K
Softening Temperature ca. 600 °C
Vickers Hardness 4.93 +/- 0.34 kN/mm2
Specific Impedance 109 - 1020 Ohm/cm
Refractive Index 1.52
Water Resistance Hydrolytic Class 4 -5
Acid Resistance Acid Class 1
Resistance to Alkaline Solutions Alkaline Class 1 - 2