▎ 摘　　要

NOVELTY - A low silver composite solder comprises matrix materials comprising tin-silver-copper, and 0.01-0.09 wt.% graphene. USE - Low silver composite solder. ADVANTAGE - The low silver composite solder with high tensile strength has excellent wetting performance, and solderability. DETAILED DESCRIPTION - A low silver composite solder comprises matrix materials comprising tin-silver-copper (Sn-0.3Ag-0.7Cu), and 0.01-0.09 wt.% graphene. An INDEPENDENT CLAIM is included for preparation of low-silver SAC composite solder with high tensile strength.