Brazing Solutions

INDUSTRY EXPERTISE

Choosing the right brazing alloy

Choosing the right brazing alloy and the right amount for your application depends on several factors including base materials being brazed, clearance of parts, service conditions, brazing temperature and alloy cost.

Phos-Copper - Alloys from 0% - 18% silver content. AWS BCuP classification. Used for copper-to-copper and copper-to-brass joints.

Silver - Alloys from 18% - 99.9% silver content. AWS BAg classification. Used for copper-to-steel, steel-to-steel, and brass-to-steel joints.

Aluminum - Pure 4047, 78/22, 98/2. Used for aluminum-to-aluminum and aluminum-to-copper joints.

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Filler Metal Selection Chart

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Estimating amount of brazing alloys required.

PRO KNOW HOW

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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. A neutral flame for oxy-acetylene applications is recommended. Avoid using a flame with excessive oxygen. The flame’s 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 flux is required to reduce surface oxides, protect the base metal during heating, and reduce filler metal surface tension. Flux should be used sparingly and applied with a brush.

Product Spotlight

Recognized and trusted all over the world! Harris® 0

This is Harris’ most popular copper-to-copper brazing alloy used for OEM production as well as aftermarket HVAC installation and repair. Harris® 0 has extremely consistent flow characteristics because it is manufactured using the purest raw materials. The bright and shiny appearance of our finished material reflects our advanced manufacturing process capabilities and dedication to quality.

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