Nickel Brazing Alloys
Aufhauser Nickel Brazing filler alloys are chosen for applications requiring higher service temperatures, greater joint strength, and superior corrosion resistance.
Appropriate for joining heat and corrosion-resistant alloys such as stainless steels, nickel- and cobalt-base alloys and superalloys, Nickel Brazing Alloys are also ideally suitable for vacuum systems and diffusion brazing processes due to low vapor pressure properties. Commonly used in various joining and fabrication applications for aerospace, engines and turbines, food and chemical processes, nuclear energy, heat exchangers and cryogenic tank storage industries. Typically available in paste, powder, spray, foil, preforms, tape forms.
| Aufhauser Trade Name | AWS A5.8 | Ni | Cr | Fe | Si | B | P | C | Cu | W | Mn | Co/ other |
Solidus (Melting) | Liquidus (Flowing) | Description |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Ni-73 | BNi-1 | Bal | 14 | 4.5 | 4.5 | 3 | 0.02 | 0.8 | - | - | - | - | 1790°F/ 977°C | 1900°F/ 1038°C | Used for brazing stainless steels, superalloys at high temperatures. AMS 4775 |
| Ni-74 | BNi-1a | Bal | 14 | 4.5 | 4.5 | 3 | 0.02 | 0.06 | - | - | - | - | 1790°F/ 977°C | 1970°F/ 1077°C | Similar to Ni-73 but with lower carbon content. AMS 4776 |
| Ni-83 | BNi-2 | Bal | 7 | 3 | 4.5 | 3 | 0.02 | 0.06 | - | - | - | - | 1780°F/ 971°C | 1830°F/ 999°C | Alloy with low brazing temperature. Ideal for thick parts of SS, nickel & cobalt base alloys. Available in foil and preforms. AMS 4777 |
| Ni-92 | BNi-3 | Bal | - | 0.5 | 4.5 | 3 | 0.02 | 0.06 | - | - | - | - | 1800°F/ 982°C | 1900°F/ 1038°C | Lower temperature brazing of highly stressed parts, close tolerances. Available in foil and preforms. AMS 4778 |
| Ni-93 | BNi-4 | Bal | - | 1.5 | 3.5 | 2 | 0.02 | 0.06 | - | - | - | - | 1800°F/ 982°C | 1950°F/ 1066°C | Produces larger, more ductile fillets, for larger gaps. AMS 4779 |
| Ni-71 | BNi-5 | Bal | 19 | - | 10 | 0.03 | 0.02 | 0.06 | - | - | - | 0.10 other |
1975°F/ 1080°C | 2075°F/ 1135°C | High silicon content good for narrow, deep joints. AMS 4782 |
| Ni-72 | BNi-5a | Bal | 19 | 0.5 | 7 | 1.2 | 0.02 | 0.1 | - | - | - | - | 1931°F/ 1055°C | 2111°F/ 1155°C | Available in foil and preforms. |
| Ni-76 | BNi-5b | Bal | 15 | - | 7.3 | 1.4 | - | 0.06 | - | - | - | - | 1886°F/ 1030°C | 2058°F/ 1126°C | Excellent oxidation/corrosion resistance. |
| Ni-P | BNi-6 | Bal | - | - | - | - | 11 | 0.06 | - | - | - | - | 1610°F/ 877°C | 1610°F/ 877°C | An eutectic nickel brazing alloy with a low melting point. Available in foil and preforms. |
| Ni-P-Cr | BNi-7 | Bal | 14 | 0.2 | 0.1 | 0.02 | 10 | 0.06 | - | - | 0.04 | - | 1630°F/ 888°C | 1630°F/ 888°C | Eutectic nickel brazing alloy with chromium |
| Ni-65 | BNi-8 | Bal | - | - | 7 | - | 0.02 | 0.06 | 4.5 | - | 23 | - | 1800°F/ 982°C | 1850°F/ 1010°C | Manganese content requires special brazing procedures |
| Ni-80 | BNi-9 | Bal | 15 | 1.5 | - | 3.7 | 0.02 | 0.06 | - | - | - | - | 1930°F/ 1055°C | 1930°F/ 1055°C | An eutectic nickel brazing alloy with a high melting point. Available in foil and preforms. |
| Ni-62 | BNi-10 | Bal | 12 | 3.5 | 3.5 | 2.5 | 0.02 | 0.5 | - | 16 | - | - | 1780°F/ 970°C | 2020°F/ 1105°C | |
| Ni-68 | BNi-11 | Bal | 10 | 3.5 | 3.5 | 2.5 | 0.02 | 0.4 | - | 12 | - | - | 1780°F/ 970°C | 2000°F/ 1095°C | |
| Ni-64 | BNi-12 | Bal | 25 | 0.2 | 0.1 | 0.02 | 10 | 0.06 | - | - | - | 0.10 | 1620°F/ 880°C | 1740°F/ 950°C | High chromium content |
| Ni-78 | BNi-13 | Bal | 8 | 0.4 | 4 | 3 | 0.02 | 0.06 | 2.5 | - | - | Mo 2 Nb 2 |
1775°F/ 970°C | 1980°F/ 1080°C | |
| Ni-60 | - | Bal | 29.5 | - | 4 | - | 6 | - | - | - | - | - | 1742°F/ 950°C | 1885°F/ 1030°C | |
| Ni74-Ti | - | 73 - 74 | 16 - 17 | 8 - 9 | - | - | - | - | - | - | - | Ti 0.3 - 0.5 | 2470°F/ 1355°C | 2588°F/ 1420°C | |
| NiPalCr-36 | - | 50 | 10.5 | - | 0.5 | 3 | - | - | - | - | - | Pd 36 | 1508°F/ 820°C | 1760°F/ 960°C | For vacuum brazing. Pratt & Whitney CWP475 |
| Co-50 | BCo-1 | 17 | 19 | 1.0 | 8 | 0.8 | 0.02 | 0.4 | - | 4 | - | Bal | 2050°F/ 1120°C | 2100°F/ 1149°C | AMS 4783 |