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BVAu-7 Technical Data


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.


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


  • 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



  • Au: 50%
  • Ni: 25%
  • Pd: 24.94%
  • Co: 0.06%

The information and recommendations contained in this publication have been provided without charge & compiled from sources believed to be reliable and to represent the best information available on the subject at the time of issue. No warranty, guarantee, or representation is made by the Prince and Izant Company, Inc. as to the absolute correctness or sufficiency of any representation contained in this and other publications; Prince and Izant Company, Inc. assumes no responsibility in connection therewith; nor can it be assumed that all acceptable safety measures are contained in this and other publications, or that other or additional measures may not be required under particular or exceptional conditions or circumstances. The company and product names referenced herein are for identification purposes only. All trademarks and registered trademarks are the property of their respective owners.

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