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Borosilicate glass tubing and rod, varying types of inner and outer shapes. It exhibits high chemical resistance, high hydrolytic resistance and high resistance to thermal shock.
See where Borosilicate Glass CONTURAX® falls on the material property chart for Density against Elastic modulus in your materials selection and design process. Our Ashby charts are interactive with more technical data upon clicking. Sign up to get access to this premium feature for free.
2.23 g/cm³ at 20 °C
63 GPa at 20 °C
0.2 [-] at 20 °C
Viscosity 10¹³ dPa.s (ISO 7884-4)
Coefficient of thermal expansionα
3.3E-6 1/K at 20 °C
mean value for 20-300 °C - ISO 7991
Glass transition temperatureTg
Viscosity 10⁷·⁶ dPa.s (ISO 7884-3)
Specific electrical resistance temperatureTk
For ρ = 10⁸ Ω·cm
1.2 W/(m·K) at 90 °C
Viscosity 10⁴ dPa.s (ISO 7884-2)
Dielectric constant, 1MHzεr,1MHz
4.6 [-] at 20 °C
1000000 Ω·m at 250 °C
Loss tangent, 1MHztanδ1,MHz
3.7E-3 [-] at 20 °C
at λ=587.6 nm
Stress optical coefficientk
max., Lead, Cadmium, Mercury and Hexavalent Chromium
Engineering (Glass apparatus), Renewable energies (Receiver), Home (Furniture, Architecture, Partition walls, Giftware and others), Lighting (Neon tubing, Safe lighting, ), Laboratory/Industrial Technology (Glassblown laboratory ware, Pressed glass articles like balls and lenses, Technical articles), Sprinkler, Art installations
Hydrolytic resistance Class HGB1 (ISO 719) - Acid resistance Class S1 (DIN 12116) - Alkali resistance Class A2 (ISO695)
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This material data has been provided by Schott Glass Tubing.