Phos-Copper-Silver Brazing Alloy (Low-silver solder) 1. Introduction Phos-Copper-Silver Brazing Alloy can reduce melting point, improve plasticity of brazing alloy and wettability of copper, as well as brazing alloy’s strength and toughness. Note:1, P: phosphorus; AG: Silver; Cu: copper; 2, CWA: China welding association; AWS: America welding Society; Russia: (unknown) 3, REM: Remain; 4, ERW: Electric Resistance Welding