Silver Brazing Alloys

SILVER BRAZING ALLOYS

Copper based filler metals that meets the needs for high-strength applications; historically used in HVAC, Refrigeration, Plumbing and Medical Gas applications.

In Copper to Copper applications these alloys are self-fluxing; Copper to Copper Alloys (Brass or Bronze) do require a flux to help reduce oxide build up and improves for capillary action of the filler metal. These alloys are not suitable in joining Ferrous Metals.

Please confirm your local or national codes for Medical Gas specifications and applications.

SIL-FOS 5®

Silver: 5.0% +- 0.2%, Copper: 89.0% +- 1.0%, Phosphorus: 6.0% +- 0.2%, Other Elements (Total): 0.15% Max

Sil_Fos 5® was developed primarily for use on copper, but its use has extended to other non-ferrous copper base alloys. It is used extensively on refrigeration units, air conditioning apparatus, electrical conductors, copper and brass pipe fittings, and other copper and brass equipment.

  • Melting Point (Solidus): 1190ºF (643ºC) | Flow Point: 1325ºF (718ºC)
  • Brazing Temperature Range: 1325ºF-1500ºF (718ºC-815ºC)

SIL-FOS 15®

Silver: 15.0% +- 0.5%, Copper: 80.0% +- 1.0%, Phosphorus: 5.0% +- 0.2%, Other Elements (Total): 0.15% Max

Sil_Fos 5® was developed primarily for use on copper, but its use has extended to other non-ferrous copper base alloys. It is used extensively on refrigeration units, air conditioning apparatus, electrical conductors, copper and brass pipe fittings, and other copper and brass equipment.

  • Melting Point (Solidus): 1190ºF (643ºC) | Flow Point: 1300ºF (705ºC)
  • Brazing Temperature Range: 1300ºF-1500ºF (705ºC-815ºC)

FOS-FLO 7®

Phosphorus: 7.25% +- 0.25%, Copper: Balance, Other Elements (Total): 0.15% Max

Fos-Flo is a low cost brazing filler metal suitable for joining copper to copper and copper to copper alloys where critical impact or vibration stresses are not encountered in service. It should only be used on assemblies where good fit-up can be maintained.

  • Melting Point (Solidus): 1310ºF (710ºC) | Flow Point: 1460ºF (793ºC)
  • Brazing Temperature Range: 1350ºF-1550ºF (732ºC-843ºC)
DESCRIPTION CODE DIAMETER APPROX. PC/lb CONTAINER WEIGHT AWS
SIL-FOS #5X20” HHSIL0516 1.6mm 54 1lb BCuP-3
SIL-FOS #5X20” HHSIL0524 2.4mm 24 1lb BCuP-3
SIL-FOS #15X20” HHSIL1516 1.6mm 54 1lb BCuP-5
SIL-FOS #15X20” HHSIL1524 2.4mm 24 1lb BCuP-5
FOS-FLO 7X20” HHFOSFLO0720 0.050”x0.125” 28 1lb BCuP-2