Standard Test Method for Measurement of Viscosity of Glass Between Softening Point and Annealing Range (Approximately 108 Pa·s to Approximately 1013 Pa·s) by Beam Bending (Metric)

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

08-01-2019

Publisher

American Society for Testing and Materials

This test method covers the determination of glass viscosity from approximately 108 Pa·s to approximately 1013 Pa·s by measuring the rate of viscous bending of a simply loaded glass beam.

1.1This test method covers the determination of glass viscosity from approximately 10⁸ Pa·s to approximately 10¹³ Pa·s by measuring the rate of viscous bending of a simply loaded glass beam.2 Due to the thermal history of the glass, the viscosity may not represent conditions of thermal equilibrium at the high end of the measured viscosity range. Measurements carried out over extended periods of time at any temperature or thermal preconditioning will minimize these effects by allowing the glass to approach equilibrium structural conditions. Conversely, the method also may be used in experimental programs that focus on nonequilibrium conditions.

1.2The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

1.4This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

Committee	C 14
DocumentType	Test Method
Pages	4
PublisherName	American Society for Testing and Materials
Status	Current
Supersedes	ASTM C 1350M : 1996 : R2013

ASTM C 135M : 1996	Standard Test Method for Measurement of Viscosity of Glass Between 10<sup>4</sup> Pa-s and 10<sup>8</sup> Pa-s by Viscous Compression of a Solid Right Cylinder [Metric]
ASTM C 965 : 1996 : R2017	Standard Practice for Measuring Viscosity of Glass Above the Softening Point
ASTM C 1351M :1996 : R2022	Standard Test Method for Measurement of Viscosity of Glass Between 10<sup>4</sup> Pa·s and 10<sup>8</sup> Pa·s by Viscous Compression of a Solid Right Cylinder [Metric]
ASTM C 965 : 2023	Standard Practice for Measuring Viscosity of Glass Above the Softening Point