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Borosilicate Glass CONTURAX®
CONTURAX®
Description
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.
Ashby charts
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Properties
General
Density
ρ2.23 g/cm³ at 20 °C
Mechanical
Elastic modulus
E63 GPa at 20 °C
Poisson's ratio
ν0.2 [-] at 20 °C
Thermal
Annealing temperature
Tanneal560 °C
Viscosity 10¹³ dPa.s (ISO 7884-4)
Coefficient of thermal expansion
α3.3E-6 1/K at 20 °C
mean value for 20-300 °C - ISO 7991
Glass transition temperature
Tg525 °C
ISO 7884-8
Softening temperature
Tsoftening825 °C
Viscosity 10⁷·⁶ dPa.s (ISO 7884-3)
Specific electrical resistance temperature
Tk250 °C
For ρ = 10⁸ Ω·cm
Thermal conductivity
λ1.2 W/(m·K) at 90 °C
Working temperature
Tworking1260 °C
Viscosity 10⁴ dPa.s (ISO 7884-2)
Electrical
Dielectric constant, 1MHz
εr,1MHz4.6 [-] at 20 °C
Electrical resistivity
ρel1000000 Ω·m at 250 °C
Loss tangent, 1MHz
tanδ1,MHz3.7E-3 [-] at 20 °C
Optical
Refractive index
nd1.47 [-]
at λ=587.6 nm
Stress optical coefficient
k4E-6 mm²/N
DIN 52314
Chemical properties
Element
Weight %
Comment
0.01 %
max., Lead, Cadmium, Mercury and Hexavalent Chromium
Technological properties
Application areas
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
Corrosion properties
Hydrolytic resistance Class HGB1 (ISO 719) - Acid resistance Class S1 (DIN 12116) - Alkali resistance Class A2 (ISO695)
Do you need more data regarding this material?
This material data has been provided by Schott Glass Tubing.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.
