Alloy 4047 was originally developed as a brazing alloy (BAISI-4) or (718) to take advantage of its low melting point and narrow freezing range. In addition, it has a higher silicon content than 4043, which provides for increased fluidity and reduced shrinkage. The alloy produces bright and almost smut free welds. Hot cracking is significantly reduced when 4047 is used as a filler alloy.

AlcoTec produces "ALTIGWELD" filler rods in 36 inch (914mm) straight lengths designed for gas tungsten-arc (GTA) welding or brazing operations. The AlcoTec cleaning system and quality control process routinely ensures surface cleanliness and metallurgical integrity of the rods. Each rod is also embossed with the alloy identification every six inches.

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