Why should some lead-free alloys be approached cautiously?
The compositions and traits of lead-free solder alloys vary greatly. However, some alloys should be approached cautiously: · Tin migration during high temperature thermocycling is often associated with tin-silver alloys. · Alloys with a high percentage of exotic or expensive metals may be cost prohibitive. · Very high melting temperatures, which may damage parts, exist with some tin-silver and tin copper alloys. · The inevitable damage or destruction of parts during repair, such as with conductive adhesives, is something to be wary of.
