The copper-phosphorus filler metals with good fluidity are a     kind of copper and phosphorus two elements alloy base or copper,phosphorus     and sliver three elements.They can adopt contact welding.oxyfuel gas     welding.high frequency welding and furnace welding.

The copper-phosphorus alloy with sliver will greatly improve     wettability,strength toughness and lower melting point.theseproducts are     mainly applied on the refrigeration.air conditioner.water heater as well as     transformer,motor,instruments and meters etc.

Thecopper-phosphorus filler     metals are suitable to braze copper,brasses but they can not be suitable to     braze ferrous.The phosphorus in the filler metals can reduce oxide of     copper and oxde of sliver as braxing flux,so you don`t need it when you     braze when you braze copper alloy because the phosphorus can`t fully reduce     the oxide formed by copper alloy element.

Before brazing,you should clear     away all dirt on the brazed place and on the surface of object to be brazed     such as greasy dirt,oxide and so on,the best brazed joints is between0.03mm to 0.075mm.

Theheat speed should be quick     as possible when brazing in order to avoid the flat of the filler metals     because of slow heat process .The copper color will be reture if it is     dipped into 10percent of sulphuric acid solution.