Copper-Phosphorus alloys have outstanding brazing properties and wide capabilities. Phosphorus will alloy readily with copper. Phosphorus is a reducing agent for copper and also deoxidizes silver. These brazing alloys of copper-phosphorus and silver-copper-phosphorus are self-fluxing on pure copper.

The reduction of phosphorus and additions of silver have a profound effect upon the fluidity of brazing alloys. The alloys of higher phosphorus content are extremely fluid, while the lower phosphorus, high silver alloy has a broad plastic range. Even small adjustments in alloy percentages have a marked effect on brazing alloy fluidity.

These brazing alloys are primarily used for joining copper and copper alloys and copper-phosphorus can be used for all brazing processes.

Phos-Copper Brazing Alloys

Brazing Alloys	CHEMICAL COMPOSITION (%)				Melting Range		Application
	Cu	P	Sn	Impurty Total	Solidus /	Liquidus /
BCu92P	Bal.	7. 8~8. 5	-	≤0. 10	1310/710	1365/740	For copper-copper and copper-brass application.
BCu93P		6. 5~7. 5	-		1310/710	1455/790
BCu86PSn		6. 5~7. 5	6. 5~7. 5		1185/640	1260/680