5% silver welding rods, 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-Silver Brazing Alloys
|
Brazing Alloys |
CHEMICAL COMPOSITION (%) |
Melting Range |
Application | ||||
|
Cu |
Ag |
P |
Impurty Total |
Solidus / |
Liquidus / | ||
|
BCu91PAg |
Bal. |
1.8~2.2 |
6.8~7.5 |
≤0.10 |
1190/643 |
1455/790 |
For brazing copper parts in air-conditioners, freezers, refrigerators and motors. The brazing performance is excellent. |
|
BCu88PAg |
4.6~5.2 |
6.5~7.0 |
1190/643 |
1445/785 | |||
|
BCu87PAg |
5.8~6.2 |
6.8~7.5 |
1190/643 |
1370/745 | |||
|
BCu84PAg |
9.5~10.5 |
6.0~7.0 |
1195/647 |
1210/655 | |||
|
BCu80PAg |
14.5~15.5 |
4.8~5.3 |
1190/643 |
1470/800 | |||