User:Kandi111777/Tin silver copper

Overview
SAC (SnAgCu) http://www.indium.com/techlibrary/whitepapers/leadfree-solderingmdashwhere-the-world-is-going

http://en.wikipedia.org/wiki/Solder

http://www.amtechsolder.com/key_metals.html

http://www.electroiq.com/index/display/smt-article-display/7623494879/articles/smt/surface-mount_technology/soldering/solder-and_flux/2010/june/new-in_solders__no-clean.html