Filler Metal Selection
Aufhauser Filler Metal Selection Chart
| Metals to be Joined |
Filler Metals | Melting Range | Fluidity Rating* |
Fluxes | Torches & Flames** |
||
|---|---|---|---|---|---|---|---|
| Solders | Brazing |
Solidus | Liquidus | ||||
| Copper or Brass to Copper or Brass |
Tin-Silver 96/4 | 430°F | 430°F | 10 | SolderFLux Liquid(F150) , SolderFlux Paste(F155) | Air-fuel | |
| Tin-Silver 95/5 | 430°F | 535°F | 8 | ||||
| PhosCopper 0 | 1310°F | 1460°F | 5 | No flux required for copper-to-copper joints with the phosphorus-bearing filler metals. For brass and other alloys of copper, use Stay-Silv White Brazing Flux. | Oxy-acetylene (neutral flame) |
||
| PhosCopper 5 | 1190°F | 1495°F | 3 | ||||
| PhosCopper 6D | 1190°F | 1465°F | 3 | ||||
| PhosCopper 6 | 1190°F | 1425°F | 5 | ||||
| PhosCopper 15 | 1190°F | 1475°F | 3 | ||||
| Copper or Brass to Steel or Stainless |
Tin-Silver 96/4 | 430°F | 430°F | 10 | SolderFLux Liquid(F150), SolderFLux Paste(F155) | Air-fuel | |
| Tin-Silver 95/5 | 430°F | 535°F | 8 | ||||
| SilverAlloy A-56T | 1145°F | 1205°F | 8 | Oxy-acetylene (slightly reducing flame) |
|||
| SilverAlloy A-40 | 1250°F | 1350°F | 5 | ||||
| SilverAlloy A-45 | 1225°F | 1370°F | 6.5 | ||||
| SilverAlloy A-45T | 1195°F | 1251°F | 7 | ||||
| Steel or Stainless to Steel or Stainless |
Tin-Silver 96/4 | 430°F | 430°F | 10 | SolderFLux Liquid(F150), SolderFLux Paste(F155) | Air-fuel | |
| Tin-Silver 95/5 | 430°F | 535°F | 8 | ||||
| SilverAlloy A-56 | 1145°F | 1200°F | 8 | Oxy-acetylene (slightly reducing flame) |
|||
| SilverAlloy A-40 | 1250°F | 1350°F | 5 | ||||
| SilverAlloy A-45 | 1225°F | 1370°F | 6.5 | ||||
| SilverAlloy A-45T | 1195°F | 1251°F | 7 | ||||
| Steel or Stainless to Carbides |
Not recommended | Black SilverFlux(F130) | Oxy-acetylene (reducing flame) |
||||
| SilverAlloy A-40Ni2 | 1240°F | 1435°F | 4.5 | ||||
| Aluminum to Aluminum (1) Aluminum to Nickel (2) Aluminum to Steel (3) Aluminum to Stainless (3) Aluminum to Copper (4) Aluminum to Brass (4) |
ALZN | 715°F | 725°F | Not rated | AlumFlux(F100) | Air-fuel | |
| AlumBraze Flux-Core | 1070°F | 1080°F | Not rated | AlumFlux(F100) | Air-fuel |
* The higher the fluidity rating, the faster the alloy flows within the melting range.
** For best results and strong leakproof bonds, filler metals should be applied to the joint area only after the parts are heated to the proper brazing temperature. Oxy-acetylene torches may be substituted for air-fuel, but will require care to prevent melting of the base metals with this higher temperature flame.
(1) Can be brazed directly.
(2) Can be brazed directly or precoated with aluminum.
(3) Plate steel surface with aluminum.
(4) Not usually recommended. Use steel transition piece between aluminum and copper. Coat one steel end with aluminum. Braze coated steel to aluminum with AL 4047. Braze uncoated end to copper with Aufhauser SilverAlloy A-45T.