PAL 5
AWS: BVAg-30
PAL 5 can be used on any of the common ferrous and non-ferrous alloys. The most common base materials joined are kovar and Mo/Mn seals. Due to its low vapor pressure compared to standard silver base filler metals, PAL 5 is suitable for use in all vacuum applications such as electronic valve construction, and vacuum tube construction in electronic industry. Often this alloy is used in brazing of metalized ceramics to nickel-cobalt-iron assemblies and in glass to metal seals.
Available Forms
Wire, strip, engineered preforms and specialty preforms per customer specification, powder and paste
Characteristics
The palladium content in PAL 5 inhibits the potential of stress corrosion cracking in iron-nickel base metals in comparison to standard silver-copper alloys. PAL 5 exhibits higher corrosion and oxidation resistance than standard silver-copper alloys.
Properties
The properties of a brazed joint are dependent upon the base metal, joint design and brazing technique. For controlled atmosphere brazing or vacuum brazing the recommended radial joint clearance for silver base alloys falls within 0.000in – 0.002in (0.00mm – 0.05mm) range.
Specs
American Welding Society (AWS)
BVAg-30
Solidus
1485 F / 806 C
Liquidus
1490 F / 809 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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