Aufhauser brazing and welding Alloys

Electrical / Electronic Components

FAQ

Ans. The copper phosphorus alloys (with or without silver) are not as versatile as the silver brazing alloys. Copper phosphorus alloys are used primarily in the joining of copper to copper. The phosphorus acts as the flux. Silver brazing alloys can be used not only on the same base materials as the copper phosphorus alloys, but also on many other base materials.

Ans. Copper phosphorus alloys can be used on brass, silver, tungsten and molybdenum. However they are not self-fluxing on these materials.

Ans. The iron and nickel will react with the phosphorous, forming intermetallic brittle phosphide compound, resulting in a weak joint.

Ans. For the more common standard type of joints, a gap of .002-.005 inches is suggested for both silver and copper phosphorus filler metals. We recommend that you contact our technical experts if you have a question regarding a specific application.

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Brazing of electrical contactor assemblies

Successful brazing of electrical contacts onto contactor assemblies can be achieved using a specially formulated brazing paste or a 'solder' backed contact. Several brazing filler metals that are suitable for this application are listed here:

Aufhauser Product name	Nominal Chemical Composition %					Solidus/ Liquidus °F	AWS A5.8
Aufhauser Product name	Ag	Cu	Zn	P	Sn	Solidus/ Liquidus °F	AWS A5.8
SilverAlloy A-56T	56	22	17		5	1145/1205	BAg-7	Request Quote
PhosCopper 15	15	80		5		1220/1305	BCuP-5	Request Quote
SilverAlloy A-45T	45	27	25		3	1195/1251	BAg-36	Request Quote

Brazed joints in electric motors

Silver copper phosphorus brazing filler metals for copper to copper joints:

Aufhauser Product name	Nominal Chemical Composition %						Solidus/ Liquidus °F	AWS A5.8
Aufhauser Product name	Ag	Cu	Zn	Ni	Sn	P	Solidus/ Liquidus °F	AWS A5.8
PhosCopper 15	15	80				5	1190/1475	BCuP-5	Request Quote
PhosCopper 5	5	89				6	1190/1495	BCuP-3	Request Quote
PhosCopper 2	2	91				7	1190/1490	BCuP-6	Request Quote