Materials E-Guide
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Amdry 790 is a nickel-based braze filler metal with a composition that meets AWS BNi-4 and AMS 4779 (grade 140F). Joints have excellent ductility with good strength, oxidation resistance and corrosion resistance. Its sluggish flow allows it to fill wider gaps. Its low diffusion characteristics makes it a good choice for thin-walled components. Braze Amdry 790 in vacuum, argon or dry hydrogen atmospheres. It is available in powder and paste forms. Customized tape is available on request.
Characteristics
| Material type | Brazing Powder |
|---|---|
| Product form | Powder |
| Material safety datasheet number | 50-1039; 50-1099; 50-1108; 50-1121 |
| Achieved surface function primary |
Dimensional Restoration |
| Suitable for service environmen |
Combustion/Flue Gas |
| Recommanded brazing range (min) | 1065 |
| Recommanded brazing range (max) | 1175 |
| Brazing gap size range (min) | 0.05 |
| Brazing gap size range (max) | 0.3 |
| Liquidus temp. | 1065 |
| Solidus temp. | 980 |
| Base composition | Nickel |
| Nominal chemistry | Ni 3.5Si 2B |
| Customer specification approved |
AWS A5.8 BNi-4, 140F National Oilwell Varco FCMS-041 Rolls-Royce plc MSRR 9500/700 Rolls-Royce plc MSRR 9500/700T (Tape) SAE International AMS 4779, 140F |
| Recommended process technology |
Brazing |
| Datasheet number | DSM-0340 |