 |
| Purchase Information |
| Use this form to request purchase information on ASTM online subscriptions. |
|
|
Document ASTM C 598 is offered by IHS as part of an online subscription. This subscription contains many documents on the same topic.
You may also purchase this document alone from the IHS Standards Store.
ASTM C 598 Document Information:
Title
Standard Test Method for Annealing Point and Strain Point of Glass by Beam Bending
ASTM International
Publication Date:
Nov 15, 1993
Scope:
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.
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
This test method, as an alternative to Test Method C 336 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.
The values stated in metric units are to be regarded as the
standard. The values given in parentheses are for information
only.
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 and
health practices and determine the applicability of regulatory
limitations prior to use.
2 Hagy, H. E., "Experimental Evaluation of Beam
Bending Method of Determining Glass Viscosities in the Range 108 to
1015 Poises," Journal of the American Ceramic Society, Vol
46, No. 2, 1963, pp. 95–97.
3 NIST Special Publication 260.
About IHS
IHS (NYSE: IHS) is a leading global provider of critical technical information, decision-support tools and related services in a number of industries including aerospace and defense, automotive, construction, electronics, and energy. IHS serves customers ranging from large governments and multinational corporations to smaller companies and technical professionals in more than 100 countries. IHS been in business for more than 45 years and employ more than 2,300 people around the world.
