This standard BS EN ISO 9453:2020 Soft solder alloys. Chemical compositions and forms is classified in these ICS categories:
25.160.50 Brazing and soldering
This document specifies the requirements for chemical composition for soft solder alloys containing two or more of: tin, lead, antimony, copper, silver, bismuth, zinc, indium and/or cadmium.
An indication of the forms generally available is also included.