根据填充金属、形式和活性温度范围，对18种钎焊和钎焊用焊剂进行了分类。分类依据的是一个分类系统，该系统使用代号FB来指示钎焊和钎焊应用的焊剂。除了为每种分类选择测试外，主要主题还包括一般要求、测试程序和包装要求。附件列出了一般应用指南。本规范使用国际单位制（SI）和美国惯用单位。测量值可能不是精确的等价物；因此，每个系统应单独使用。

Eighteen fluxes for brazing and braze welding are classified according to the filler metal, form, and activity temperature range. Classification is in accordance with a classification system that employs the designator FB to indicate fluxes for brazing and braze welding applications. In addition to selected tests for each classification, major topics include general requirements, testing procedures, and packaging requirements. An annex listing general application guidelines is included.This specification makes use of both the International System of Units (SI) and U.S. Customary Units. The measurements may not be exact equivalents; therefore, each system shall be used independently.