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 | |||