BS EN ISO 9453:2020 pdf free.Soft solder alloys - Chemical compositions and forms. BS EN ISO 9453 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.There are no normative references in this document.For...