Materials E-Guide
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Amdry 770 is a nickel-based braze filler metal with a composition equivalent to AWS BNi-2 and AMS 4777 (grade 140F). Joints of Amdy 770 have excellent corrosion resistance and strength, with good ductility and oxidation resistance. Use Amdry 770 for medium size gaps where the joint depth is not extemely deep. Braze Amdry 770 in vacuum furnaces or furnaces or atmospheres of argon or dry hydrogen. It is available in powder and paste forms and may be ordered as a customized tape on request.
Characteristics
| Material type | Brazing Powder |
|---|---|
| Product form | Powder |
| Material safety datasheet number | 50-1038; 50-1095; 50-1104; 50-1117 |
| Achieved surface function primary |
Dimensional Restoration |
| Suitable for service environmen |
Combustion/Flue Gas |
| Recommanded brazing range (min) | 1010 |
| Recommanded brazing range (max) | 1177 |
| Brazing gap size range (min) | 0.08 |
| Brazing gap size range (max) | 0.12 |
| Liquidus temp. | 999 |
| Solidus temp. | 971 |
| Base composition | Nickel |
| Nominal chemistry | Ni 7Cr 4.5Si 3B 3Fe |
| Max. service temp. | 982 |
| Customer specification approved |
AWS A5.8 BNi-2, 140F Honeywell EMS 54752, Type II Rolls-Royce plc MSRR 9500/97 Rolls-Royce plc MSRR 9500/97T (Tape) SAE International AMS 4777, 140F |
| Recommended process technology |
Brazing |
| Datasheet number | DSM-0337 |