Brazing is a metal joining process in which two or more metal items are joined together by melting and flowing a filler metal into the joint.

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Brazing differs from welding in that it does not involve melting the work pieces and from soldering in using higher temperatures for a similar process, while also requiring much more closely fitted parts than when soldering. The filler metal flows by capillary action.

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Some of the more common types of filler metals used are:

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• Aluminum-silicon

• Copper

• Copper-silver

• Copper-zinc (brass)

• Copper-tin (bronze)

• Gold-silver

• Nickel alloy

• Silver