BVAu-7
BVAu-7 Technical Data
Uses
BVAu-7 can be used on any of the common ferrous, non-ferrous, and super alloys. In aerospace industry, Gold Braze 5025 can be used in brazing of fuel line assemblies and aero-engine components. Gold Braze 5025 can be used as the highest melting BAu alloy for step brazing in conjunction with AMS 4786 & AMS 4787.
Brazing Characteristics
BVAu-7 wets a wide range of high temperature iron & nickel base alloys such as the stainless steels, A286, Inconel & Inconel X very well. It does not alloy excessively with these materials nor produce the severe intergranular penetration normally associated with the nickel based brazing alloys containing boron. BVAu-7 has increased ductility compared to the other gold/nickel alloys, due to its increased level of Pd. Joint clearances of 0.0015” - 0.003” are normally suggested.
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.
Specifications
BVAu-7 alloy conforms to: Unified Numbering System (UNS) P00507, American Welding Society (AWS) BVAu-7, Society of Automotive Engineers (SAE) AMS 4784
Available Forms
Wire, strip, rod, engineered preforms and specialty preforms per customer specification, powder and paste.
Compare With
- AWS: BVAu-7
- Lucas: Premabraze 500
- UNS: P00507
Specifications
- Brazing Temperature Range High: 2150 F / 1177 C
- Brazing Temperature Range Low: 2100 F / 1149 C
- Liquidus: 2050 F / 1121 C
- Solidus: 2015 F / 1102 C
Composition
- Au: 50%
- Ni: 25%
- Pd: 24.94%
- Co: 0.06%
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