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Specification: AWS BCuP-9
Composition(%): P 6-7, Cu balance, Sn,6.0-7.0 Other 0.15 max
Physical Constants:
Solidus(ºC):637
Liquidus(ºC):675
Brazing Range(ºC):643-693
DESCRIPTION:
AWS BCuP-9 is a ternary alloy of tin, phosphorus, and copper approaching the eutectic composition. It is very fluid at brazing temperature and should be used on well fitted joints. AWS BCuP-9 is low brazing temperature and narrow solidus-liquidus range makes it ideal for applications where temperature is a factor. It should be used with slow heating rates, such as in furnace brazing.
APPLICATIONS:
AWS BCuP-9 is used for joining of copper and copper alloys, such as brass or bronze. It is suitable for use on silver, tungsten, and molybdenum. It should not be used on ferrous or nickel alloys. On copper to copper applications, it is self-fluxing due to the fluxing action of the phosphorous content. Its low melting temperature makes it ideal for application on copper to brass where temperature and de-zincification is a factor.