Silver solder has excellent process performance, good wettability and joint filling performance, low melting point, corrosion resistance, easy electrical conductivity, high mechanical strength, and good plasticity. It is suitable for a variety of brazing methods, such as stainless steel, carbon steel, Most ferrous and non-ferrous metals such as cemented carbide, copper and copper alloys. Silver solder can be further added with indium, tin, nickel and other elements to form a multi-element alloy solder to meet a variety of special performance requirements. Most of the brazing filler metal needs to be used in conjunction with the brazing flux to obtain a stable and reliable joint.