Gold Braze 35623
AWS: BAu-3
The most common use of BAu-3 is for step brazing with BAu-1 and BAu-2. BAu-3 has excellent wetting to Ni, Mo, SS, Kovar and Mo-Mn with minimal diffusion. Also used for high-integrity joints in aerospace and automotive applications, vacuum tubes, wave guide and Klystron assemblies and power surge arrestors. BAu-3 is often brazed under partial pressure due to the high vapor pressure of copper.
Available Forms
Strip, wire, powder, and preforms to specifications.
Characteristics
Wets well to superalloys and provides high ductility due to high levels of copper. BAu-3 exhibits lower corrosion resistance than other Au-Ni alloys.
Properties
The properties of a brazed joint are dependent upon the base metal, joint design and brazing technique. For atmospheric brazing the recommended radial joint clearance for gold base alloys fall within .0015-.002” range.
Specs
American Welding Society (AWS)
BAu-3
Solidus
1814 F / 990 C
Liquidus
1850 F / 1010 C
Disclaimer
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.
Resources Center
We work closely with our customers to provide guidance and support on brazing and medical precious metal related issues.