ASTM-C598 2008

$40.63

C598-93(2008) Standard Test Method for Annealing Point and Strain Point of Glass by Beam Bending

Published By	Publication Date	Number of Pages
ASTM	2008	5

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Categories: 81.040.10 - Raw materials and raw glass, ASTM

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Description

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. 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.

1.3 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.

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 and health practices and determine the applicability of regulatory limitations prior to use.

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PDF Pages	PDF Title
1	Scope Referenced Documents Terminology
2	Significance and Use Apparatus FIG. 1
3	Preparation of Test Specimen Calibration and Measurement with Standard Glass Procedure FIG. 2
4	Interpretation of Results Report Precision and Bias FIG. 3 FIG. 4
5	X1. MOMENT OF INERTIA, Ic, FORMULAS FOR VARIOUS CROSS-SECTION GEOMETRIES X2. VERIFICATION OF SPECIMEN STAND AND LOADING ROD X2.1

Additional information

Standard Title	C598-93(2008) Standard Test Method for Annealing Point and Strain Point of Glass by Beam Bending
Published Code	ASTM
Publication Date	2008
Pages Count	5
ICS Codes	81.040.10 - Raw materials and raw glass

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ASTM-C598 2008

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