AM Ag-8 is the one of the most widely used and cost effective silver brazing alloys for vacuum and controlled atmosphere brazing (CAB). AM Ag-8 is excellent for joining copper, carbon steel, Kovar, nickel-based alloys, and metallized ceramics. AM BVAg-8 is Vacuum Tube Grade (VTG) which minimizes the allowable trace elements. AM Ag-8 is a Eutectic alloy allowing it to be very free flowing with excellent wetting and diffusion. AM Ag-8 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-8 is Eutectic and is very fluid at brazing temperature. It is recommended to heat the base metals uniformly and quickly. A minimum brazing temperature of 1440°F (782°C) is recommended 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-8 and BVAg-8 Grade 1 and Grade 2 and Unified Numbering System (UNS) P07720.
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-8 / BVAg-8 Grade 1, and Grade 2
- Lucas Milhaupt: Silvaloy 721
- Prince Izant: Silver Braze 72
- UNS: P07720
- Wesgo: CUSIL
- Brazing Temperature Range High: 1535°F / 835°C
- Brazing Temperature Range Low: 1440°F / 782°C
- Liquidus: 1436°F / 780°C
- Solidus: 1436°F / 780°C
- Ag: 72%
- Cu: 28%