scope:

This standard prescribes general requirements for the classification and testing of soldering fluxes for high quality interconnections. This standard is a flux characterization, quality control, and procurement document for solder flux and flux containing material.

Purpose. This standard defines the classification of soldering materials through specifications of test methods and inspection criteria. These materials include: liquid flux, paste flux, solder-paste flux, solder-preform flux, and flux cored solder. It is not the intent of this standard to exclude any acceptable flux or soldering aid material; however, these materials must produce the desired electrical and metallurgical interconnection.

The requirements for soldering fluxes are defined in general terms for standardized classification. In practice, where more stringent requirements are necessary or other manufacturing processes are used, these shall be defined as additional requirements by the user.