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ASTM F140-98(2008)

Historical Reaffirmation

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

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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 to determining the degree of mismatch of thermal expansion (or contraction). Tests are in accordance with Test Method F 218 (Section 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.


The term reference as employed in this practice implies that either the glass or the metal of the reference glass-metal seal will be a standard reference material such as those supplied for other physical tests by the National Institute for Standards and Technology (NIST), or a secondary reference material whose sealing characteristics have been determined by seals to a standard reference material. Until standard reference materials for seals are established by the NIST, secondary reference materials may be agreed upon between manufacturer and purchaser.

SDO ASTM: ASTM International
Document Number F140
Publication Date April 1, 2008
Language en - English
Page Count 6
Revision Level 98(2008)
Supercedes
Committee C14.04
Publish Date Document Id Type View
Oct. 10, 1998 F0140-98 Revision
Aug. 1, 2020 F0140-98R20 Reaffirmation
Oct. 1, 2013 F0140-98R13 Reaffirmation
April 1, 2008 F0140-98R08 Reaffirmation
Oct. 10, 1998 F0140-98R03 Reaffirmation