The short name for the ternary-eutectic solder is "SN62", which means 62% Sn, 36% Pb, and 2% Ag. It is my normal solder (for lead-containing solder), and has a melting point slightly lower than the common (no silver) binary-eutectic "SN63", which is 63% Sn and 37% Pb. "SN60" is a more common leaded solder, close to eutectic, which is 60% Sn and 40% Pb. The silver does increase the price over Sn/Pb. Melting points (deg C):
SN60: solidus 183, liquidus 190 (non-eutectic)
SN63: solidus = liquidus = 183
SN62: solidus = liquidus = 179
where the alloy is totally solid below "solidus" and totally liquid above "liquidus". Non-eutectic alloys have different solidus and liquidus temperatures, and will be "mushy" between the temperatures; they can be considered as the excess metal (Pb in SN62) dissolved in the eutectic alloy. For comparison, a non-leaded binary eutectic is
Sn 96.5 and Ag 3.5 eutectic alloy: solidus = liquidus = 221