ASTM C598 - 93(2019) - Standard Test Method for Annealing Point and Strain Point of Glass by Beam Bending

ASTM C598 - 93(2019)

Standard Test Method for Annealing Point and Strain Point of Glass by Beam Bending

Status : Current   Published : August 2019

Format
PDF

Format
HARDCOPY



1.1 This test method covers the determination of the annealing point and the strain point of a glass by measuring the rate of midpoint viscous bending of a simply loaded glass beam. 2 However, at temperatures corresponding to the annealing and strain points, the viscosity of glass is highly time-dependent. Hence, any viscosities that might be derived or inferred from measurements by this procedure cannot be assumed to represent equilibrium structural conditions.

1.2 The annealing and strain points shall be obtained following a specified procedure after direct calibration of the apparatus using beams of standard glasses having known annealing and strain points such as those supplied and certified by the National Institute of Standards and Technology. 3

1.3 This test method, as an alternative to Test Method C336 is particularly well suited for glasses that for one reason or another are not adaptable for flame working. It also has the advantages that thermal expansion and effective length corrections, common to the fiber elongation method, are eliminated.

1.4 The values stated in metric units are to be regarded as the standard. The values given in parentheses are for information only.

1.5  This 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.

1.6  This 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.




Standard NumberASTM C598 - 93(2019)
TitleStandard Test Method for Annealing Point and Strain Point of Glass by Beam Bending
StatusCurrent
Publication Date01 August 2019
Normative References(Required to achieve compliance to this standard)No other standards are normatively referenced
Informative References(Provided for Information)No other standards are informatively referenced
Descriptors Annealing Point, Beam Bending Test, Flexural Test, Glass, Strain, Stress And Strain, Temperature
ICS81.040.10
PublisherASTM
FormatA4
DeliveryYes
Pages5
File Size186 KB
Price£40.00


 Your basket
Your basket is empty

Multi-user access to over 3,500 medical device standards, regulations, expert commentaries and other documents


Develop a PAS

Develop a fast-track standardization document in 9-12 months


Tracked Changes

Understand the changes made to a standard with our new Tracked Changes version


Worldwide Standards
We can source any standard from anywhere in the world