Anybody ever use bismuth solder ?
From Wikipedia's article on Soldering:
"Other common solders include low-temperature formulations (often containing bismuth), which are often used to join previously-soldered assemblies without un-soldering earlier connections, and high-temperature formulations (usually containing silver) which are used for high-temperature operation or for first assembly of items which must not become unsoldered during subsequent operations. ..."
Heres a link to solders with various melting temperatures listed.
With the price of silver, most are keeping the percentage very low. I think Bismuth is used mainly in electrical solders.
Okay, here is a bismuth plumbing solder BUT it has the lowest melting temp, about 400 degrees compared to others in my first link.