GB/T 43755-2024 "Pre-formed solder" specifies the terms and definitions, technical requirements, test methods, inspection rules and Encasement, marking, transportation, storage and mass certification of pre-formed solder used for brazing connections of leads and components in the manufacture of electrical and electronic equipment, communication equipment and Miscellaneous machinery. This standard applies to the production, use and quality control of solder products. It covers a variety of solder types, including tin-lead solder, lead-free solder, etc., and refers to relevant solder classification, analysis methods and terminology standards to ensure its Stability and Reliability during brazing.