BVAu-2 Technical Data
BVAu-2 is a eutectic alloy that can be used on any of the common ferrous and non-ferrous alloys. This alloy exhibits good wetting characteristics on metallized ceramics. Typical applications include brazing of electron tubes, vacuum tubes, wave guides in electronic industry.
BVAu-2 is generally used in reducing, vacuum, or inert atmosphere. It is a less ductile alloy than standard gold-copper-nickel alloys. The composition of the alloy allows for use in applications where braze filler metals low in volatile constituents are required. Due to its eutectic nature GB8020 exhibits free flowing characteristics.
Properties of Brazed Joints
The properties of a brazed joint are dependent upon numerous factors including base metal properties, joint design and brazing technique. For controlled atmosphere brazing or vacuum brazing the recommended radial joint clearance for gold base alloys fall within 0.000in – 0.002in (0.00mm-0.05mm) range.
BVAu-2 alloy conforms to: Unified Numbering System (UNS) P00807 and American Welding Society (AWS) A5.8/A5.8M BVAu-2 Grade 1 and Grade 2.
Wire, strip, engineered preforms and specialty preforms per customer specification, powder and paste.
- AWS: BVAu-2
- UNS: P00807
- Brazing Temperature Range High: 2035 F / 1113 C
- Brazing Temperature Range Low: 1985 F / 1085 C
- Liquidus: 1935 F / 1057 C
- Solidus: 1635 F / 891 C
- Au: 80%
- Cu: 20%
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