AL 718

AWS: BAlSi-4

AL 718 is a general purpose filler metal for joining aluminum and aluminum alloys. Solution temperature during heat treating must be below the solidus of the braze alloy in order to ensure integrity of the joint is maintained.

Available Forms

Wire, strip, engineered preforms, specialty preforms per customer specification, powder and paste.


AL 718 has a low melting point and narrow melt range which makes it suitable for brazing aluminum alloys. In addition, the increased silicon content compared to other aluminum filler metals provides increased fluidity as well as reduced shrinkage. The use of AL 718 also significantly reduces hot cracking during the brazing process.


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. Joint clearances of 0.003-0.005” (0.076-0.127 mm) per side ideal for achieving the highest joint strength in aluminum brazed assemblies. Base Alloy 2014-T6 6061-T4 6061-T6 6063-T4 Tensile Strength (KSI) 2014-T6: 34 6061-T4: 27 6061-T6: 27 6063-T4: 20 Yield Strength (KSI) 2014-T6: 28 6061-T4: 18 6061-T6: 18 6063-T4: 10 Elongation (%) 2014-T6: 4 6061-T4: 8 6061-T6: 8 6063-T4: 12


American Welding Society (AWS)



1070 F / 577 C


1080 F / 582 C


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.

AL 718 AWS: BAlSi-4

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