Borosilicate Glass DURAN®

Alternative and trade names
DURAN®
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Description

Borosilicate glass 3.3 acc. to ISO 3585. It exhibits high chemical resistance, high hydrolytic resistance, high resistance to thermal shock, high temperature resistance, electrically highly insulating and high transmittance. DURAN® is a registered trademark of DWK Life Sciences GmbH.

This material data has been provided by Schott Glass Tubing.

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
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.

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Properties

General

PropertyTemperatureValue

Density

20.0 °C

2.23 g/cm³

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Mechanical

PropertyTemperatureValue

Elastic modulus

20.0 °C

63 GPa

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Poisson's ratio

20.0 °C

0.2 [-]

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Thermal

PropertyTemperatureValueComment

Annealing temperature

560 °C

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Viscosity 10¹³ dPa.s (ISO 7884-4)

Coefficient of thermal expansion

20.0 °C

3.3E-6 1/K

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mean value for 20-300 °C - ISO 7991

Glass transition temperature

525 °C

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ISO 7884-8

Softening temperature

825 °C

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Viscosity 10⁷·⁶ dPa.s (ISO 7884-3)

Specific electrical resistance temperature

250 °C

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For ρ = 10⁸ Ω·cm

Thermal conductivity

90.0 °C

1.2 W/(m·K)

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Working temperature

1260 °C

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Viscosity 10⁴ dPa.s (ISO 7884-2)

Electrical

PropertyTemperatureValue

Dielectric constant, 1MHz

20.0 °C

4.6 [-]

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Electrical resistivity

250.0 °C

1000000 Ω·m

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350.0 °C

31622 Ω·m

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Loss tangent, 1MHz

20.0 °C

3.7E-3 [-]

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Optical

PropertyValueComment

Refractive index

1.47 [-]

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at λ=587.6 nm

Stress optical coefficient

4E-6 mm²/N

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DIN 52314

Chemical properties

PropertyValueComment

Other

0.01 %

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max., Lead, Cadmium, Mercury and Hexavalent Chromium

Technological properties

Property
Application areas

Engineering (Heat exchanger, Desulphorization plants, Ozone generators, Photobioreactors, Instruments / Barometers / Aerometers / Sightglasses), Electronic components (Fuses), Signal intensifier, detector and (fibre-) optics (Transmitter and x-ray tubes, Photomultipliers), Sensors, Home (Aquarium heating tubes, Furniture, Sprinkler fuses, Food packaging/cosmetics, Architecture, Galileo thermometers, Outdoor patio heater, Christmas ornameters, Handle for cups, Partition walls and Giftware), Lighting (Explosion proof lighting, Neon tubing, Flah lamps, Lamp bulbs, Exhaust and plate tubing, Safety lighting, Autonomous street lighting), Laboratory/Industrial Technology (Glassblown laboratory ware, Test tubes, NMR tubes, Measuring cylinders, Microlitetre, Syringe, Pipettes, Thermometry, Glass Straws, Pressed glass articles like balls and lenses, Technical articles), General-purpose glass for apparatus for the chemical industry, Sight- and Gauge glasses, pipelines and lab glassware, Sprinkler, Art installations, LiDAR & Radar, Pneumatic Conveying Systems, Photobioreactors, Water treatment,

Corrosion properties

Hydrolytic resistance Class HGB1 (ISO 719) - Acid resistance Class S1 (DIN 12116) - Alkali resistance Class A2 (ISO695)