ASTM F144-80(2015) PDF

Scope: 4.1 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 of Standards and Technology, or a secondary reference material whose sealing characteristics have been determined by seals to a standard reference material (see NBS Special Publication 260). Until standard reference materials for seals are established by the NIST, secondary reference materials may be agreed upon between manufacturer and purchaser.

1.1 This practice covers the preparation and testing of a reference glass-metal sandwich seal for determining stress in the glass or for determining the degree of thermal expansion (or contraction) mismatch between the glass and metal. Tests are in accordance with Test Method F218 (Section 2).

1.2 This practice applies to all glass and metal (or alloy) combinations normally sealed together in the production of electronic components.

1.3 The practical limit of the test in deriving mismatch is approximately 300 ppm, above which the glass is likely to fracture.

1.4 This standard does not purport to address all of the safety problems, 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.

ASTM F144-80(2015) Referenced Document

ASTM F105 Standard Specification for Type 58 Borosilicate Sealing Glass*， 2019-11-01 Update
ASTM F15 Standard Specification for Iron-Nickel-Cobalt Sealing Alloy*， 1998-05-10 Update
ASTM F218 Standard Test Method for Analyzing Stress in Glass*， 1995-04-20 Update
ASTM F256 Standard Specification for Chromium-Iron Sealing Alloys with 18 or 26 Percent Chromium*， 1994-04-20 Update
ASTM F30 Standard Specification for Iron-Nickel Sealing Alloys*， 2017-06-01 Update
ASTM F31 Standard Specification for 42% Nickel-6% Chromium-Iron Sealing Alloy*， 1994-04-20 Update
ASTM F47
ASTM F79 Standard Specification for Type 101 Sealing Glass*， 2019-11-01 Update

2019 ASTM F144-80(2019) Standard Practice for Making Reference Glass-Metal Sandwich Seal and Testing for Expansion Characteristics by Polarimetric Methods
1980 ASTM F144-80(2015) Standard Practice for Making Reference Glass-Metal Sandwich Seal and Testing for Expansion Characteristics by Polarimetric Methods
1980 ASTM F144-80(2010) Standard Practice for Making Reference Glass-Metal Sandwich Seal and Testing for Expansion Characteristics by Polarimetric Methods
1980 ASTM F144-80(2005) Standard Practice for Making Reference Glass-Metal Sandwich Seal and Testing for Expansion Characteristics by Polarimetric Methods
1980 ASTM F144-80(2000) Standard Practice for Making Reference Glass-Metal Sandwich Seal and Testing for Expansion Characteristics by Polarimetric Methods
2000 ASTM F144-80(1995)e1 Standard Practice for Making Reference Glass-Metal Sandwich Seal and Testing for Expansion Characteristics by Polarimetric Methods