| Brazing Alloy | Composition(%) | Melting Range(℃) | Principal areas of application | ||||
| Cu | Ag | P | 
 Impurities Total  | 
Solidus | Liquidus | ||
| HAg-6B | 余 | 5.8-6.2 | 6.8-7.5 | <0.10 | 645 | 725 | 
 It is of low melting point. It is especially fit for the automatic braze welding. It has been largely applied in the soldering with four-way valve and cut-off valve.  |