Borosilicate Glass DURATAN®

Alternative and trade names
DURATAN®
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Description

Prestressed borosilicate glass 3.3, with high chemical resistance, high hydrolytic resistance and high resistance to thermal shock.

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

PropertyValue

Density

2.23 g/cm³

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Mechanical

PropertyValue

Elastic modulus

63 GPa

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Poisson's ratio

0.2 [-]

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Thermal

PropertyTemperatureValueTesting StandardComment

Annealing temperature

560.0 °C

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ISO 7884-4

Viscosity 10¹³ dPa·s

Coefficient of thermal expansion

3.3e-06 1/K

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ISO 7991

mean value for 20-300 °C

Glass transition temperature

525 °C

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ISO 7884-8

Softening temperature

825.0 °C

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ISO 7884-3

Viscosity 10⁷·⁶ dPa·s

Specific electrical resistance temperature

250.0 °C

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For ρ=10⁸ Ω·cm

Thermal conductivity

90 °C

1.2 W/(m·K)

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Working temperature

1260.0 °C

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ISO 7884-2

Viscosity 10⁴ dPa·s

Electrical

PropertyTemperatureValueFrequency

Dielectric constant

4.6 [-]

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1MHz

Electrical resistivity

250 °C

1e+06 Ω·m

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350 °C

31623 Ω·m

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Loss tangent

0.0037 [-]

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1MHz

Optical

PropertyValueTesting StandardComment

Refractive index

1.5 [-]

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at λ=587.6 nm

Stress optical coefficient

4e-06 mm²/N

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DIN 52314

Chemical properties

Property

Other

0.01 %

max., Lead, Cadmium, Mercury and Hexavalent Chromium

Technological properties

Property
Application areas

Lamps, Home (Giftware), Flameproof lighting,

Corrosion properties

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