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It contains silicon additives which result in improved fluidity of the weld pool.
It has a bright weld finished making it a popular choice for welders.
Commonly referred to as “AlSi5", has a 5% silicon and is the oldest and one of the most widely used aluminum welding wires for general purpose applications.
Less sensitive to weld cracking than other aluminum alloys and the 5% silicon content lowers the melting point.
Increases fluidity of the weld puddle and leaves a bright shiny weld deposit.
Used for welding grades 6061, 6063, 5052, 3004, 3003 and cast alloys 356.0, 357.0, 413.0, and 443.0 to name just a few.
Brazing of 1100 and 3003 can be accomplished with free flowing 4043 composition.
Aluminum filler materials are silicon-aluminum types for welding of 6052 and 6063 types; in some cases, other aluminums are also welded with this type.
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