Aufhauser brazing and welding Alloys

Medical and Domestic Applications

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 cookware

Aufhauser brazing filler metal is used for joining copper disks to the bases of saucepans. It can be applied as a flux coated powder or powder / flux blend which is sprinkled onto the copper disk prior to assembly and heating. Lack of water or other solvents means that a good level of alloy cover is achieved.

Aufhauser Product name	Nominal Chemical Composition %						Solidus/ Liquidus °F	AWS A5.8
Aufhauser Product name	Ag	Cu	Zn	P	Sn	Cd	Solidus/ Liquidus °F	AWS A5.8
PhosCopper 0		92.75		7.25			1310/1460	BCuP-2	Request Quote

Aluminum alloy bases and heating elements are often incorporated into cookware and saucepans. Brazing can be between aluminum alloys or between aluminum alloys to stainless steel.

Aufhauser Product name	Nominal Chemical Composition %						Solidus/ Liquidus °F	AWS A5.10
Aufhauser Product name	Al	Cu	Si	Fe	Zn	Ti	Solidus/ Liquidus °F	AWS A5.10
Alloy 4047	86.4	0.3	12	0.8	0.1	0.2	1070/1080	ER & R 4047	Request Quote
Alloy 5356	93	0.1	0.25	0.4	0.1	0.2	1060/1175	ER & R 5356	Request Quote

Brazing of spectacle / glasses frames

Specialised silver brazing filler metals supplied as very fine wires are useful for this type of delicate application.

Aufhauser Product name	Nominal Chemical Composition %						Solidus/ Liquidus °F	AWS A5.8
Aufhauser Product name	Ag	Cu	Zn	Ni	Sn	Cd	Solidus/ Liquidus °F	AWS A5.8
SilverAlloy A-50Ni2	50	20	28	2			1220/1305	BAg-24	Request Quote

Brazing of medical components

Medical devices and components are often manufactured from stainless steel. A number of filler metal types are suitable for joining stainless steels. Choice of the brazing filler metal or solder will depend on the application, the operating environment as well as the number and configuration of joints or components to be made. Some of the possible filler metals are listed here:

Aufhauser Product name	Nominal Chemical Composition %						Solidus/ Liquidus °F	AWS A5.8
Aufhauser Product name	Ag	Cu	Zn	Ni	Sn	Cd	Solidus/ Liquidus °F	AWS A5.8
SilverAlloy A-40Ni2	40	30	28	2			1240/1435	BAg-4	Request Quote
SilverAlloy A-50Ni2	50	20	28	2			1220/1305	BAg-24	Request Quote
SilverAlloy A-56T	56	22	17		5		1145/1205	BAg-7	Request Quote