AM Ag-8b is the one of the most widely used and cost-effective silver brazing alloys for vacuum and controlled atmosphere brazing (CAB). AM Ag-8b is excellent for joining copper, carbon steel, Kovar, nickel-based alloys, and metallized ceramics. AM BVAg-8b is Vacuum Tube Grade (VTG) which minimizes the allowable trace elements. AM Ag-8b contains 0.75% nickel giving it slightly more strength and diffusion than similar alloys without nickel. AM Ag-8b is widely used Aerospace, Klystron assemblies, Electron tubes, Vacuum Tubes, Power surge arrestors, wave guides, metallized ceramic to metal seals, and microwave components.
AM Ag-8b is very fluid at brazing temperature. It is recommended to heat the base metals uniformly and quickly. A minimum brazing temperature of 1535°F (835°C) is recommend for furnace and vacuum applications and a flux is required when brazing without a protective cover or shielding gas.
AM Ag-8 conforms to American Welding Society (AWS) A5.8/A5.8M 2019: BAg-8b and BVAg-8b Grade 1 and Grade 2 and Unified Numbering System (UNS) P07728.
Wire, Foil, Atomized powder, Paste, Sheet, and Preformed shapes; rings, washers, discs, shims, specialty shapes. Two dimensional shapes can be Laser-cut and/or machined with EDM. Preforms must be cleaned prior to brazing.
- AWS: Bag-8b / BVAg-8b Grade 1, and Grade 2
- Lucas Milhaupt: Silvaloy 711
- Prince Izant: Silver Braze 72Ni
- UNS: P07728
- Wesgo: NICUSIL-3
- Brazing Temperature Range High: 1562°F / 850°C
- Brazing Temperature Range Low: 1535°F / 835°C
- Liquidus: 1463°F / 795°C
- Solidus: 1436°F / 780°C
- Ag: 71.15%
- Cu: 28.1%
- Ni: 0.75%