1.1 本规程涵盖两种一般配置的参考玻璃金属对接密封件的制备和测试，一种适用于确定玻璃中的应力，另一种适用于确定热膨胀（或收缩）的失配程度。试验按照试验方法进行 F218 ，第1.1小节。 1.2 本规程适用于电子元件生产中通常密封在一起的所有玻璃和金属（或合金）组合。不应尝试使用热膨胀（或收缩）特性差异很大的玻璃-金属组合。 1.3 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 本规程中使用的术语“参考”意味着参考玻璃金属密封件的玻璃或金属将是“标准参考材料”，例如国家标准与技术研究所（NIST）为其他物理测试提供的材料，或二次参考材料，其密封特性已通过标准参考材料的密封确定（见NIST SP） 260). 在NIST制定密封标准参考材料之前，制造商和买方可就二次参考材料达成一致。

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. ====== Significance And Use ====== 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 for Standards and Technology (NIST), or a secondary reference material whose sealing characteristics have been determined by seals to a standard reference material (see NIST SP 260). Until standard reference materials for seals are established by the NIST, secondary reference materials may be agreed upon between manufacturer and purchaser.