Silver Braze 50Cu
AWS: BVAg-6b
Often used for electronic applications where Zn and Cd cannot be used. Most common based metals joined are silver, copper and nickel. These materials are joined in reducing or inert atmospheres, or vacuum. Also commonly used to join metalized ceramics.
Available Forms
Wire, strip, engineered preforms, specialty preforms per customer specification, powder and paste.
Characteristics
SB50Cu is a binary system like BAg-8, but with a wider melt range. The wide melt range makes it suitable to fill wider gaps. However, it’s sluggish behavior can lead to liquation and excessive diffusion if left at the brazing temperature for an extended period of time. It wets best to silver and copper, with limited wetting on iron and nickel base metals due to their limited solubility in silver. Wetting capabilities can be increased however under vacuum and dry hydrogen conditions. SB50Cu may also exhibit an increased re-melt temperature and a decrease in fluidity due to solution of either copper or silver into the eutectic phase.
Properties
The properties of a brazed joint are dependent upon numerous factors including base metal properties, joint design, metallurgical interaction between the base metal and the filler metal.
Specs
American Welding Society (AWS)
BVAg-6b
Solidus
1435 F / 779 C
Liquidus
1602 F / 872 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.
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