ASTM-F140:2020 Edition

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F140-98(2020) Standard Practice for Making Reference Glass-Metal Butt Seals and Testing for Expansion Characteristics by Polarimetric Methods

Published By	Publication Date	Number of Pages
ASTM	2020	7

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Category: ASTM

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Description

ASTM F140-98-Reapproved2020

Active Standard: Standard Practice for Making Reference Glass-Metal Butt Seals and Testing for Expansion Characteristics by Polarimetric Methods

ASTM F140

Scope

1.1 This practice covers the preparation and testing of reference glass-metal butt seals of two general configurations, one applicable to determining stress in the glass and the other applicable to determining the degree of mismatch of thermal expansion (or contraction). Tests are in accordance with Test Method F218, Subsection 1.1.

1.2 This practice applies to all glass and metal (or alloy) combinations normally sealed together in the production of electronic components. It should not be attempted with glass-metal combinations having widely divergent thermal expansion (or contraction) properties.

1.3 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.

Keywords

expansion mismatch; glass-metal seals;

ICS Code

ICS Number Code 21.140 (Seals, glands)

DOI: 10.1520/F0140-98R20

Additional information

Standard Title	F140-98(2020) Standard Practice for Making Reference Glass-Metal Butt Seals and Testing for Expansion Characteristics by Polarimetric Methods
Published Code	ASTM
Publication Date	2020
Pages Count	7