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.

Chemical Composition:

Cu: 92.7% P: 7.3%

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