Brazing Alloys

TRAINING & EDUCATION

Use proper technique for              leak-proof brazed connections

CLEANING - This is an easy step to overlook, especially on new installations. Contaminants such as dirt, oil, or heavy surface oxide will inhibit wetting. Always wipe parts and then use a stainless steel wire brush to remove the oxide layer.

FLAME ADJUSTMENT - Flame settings depend on the type of heat source. For oxy-acetylene a neutral flame is recommended. Avoid using a flame with excessive oxygen. The flame chemistry increases surface oxides and inhibits metal wetting.

HEATING - Incorrect heating is the primary reason for poorly made joints. Adequate joint strength and ductility depend on pulling the molten braze filler metal into the connection.

FLUX - When brazing copper or brass a flux is required to reduce surface oxides, protect the base metal during heating, and reduce filler metal surface tension. Flux should be sparingly used and applied with a brush.