Definition
A method of joining two metal parts by melting a silver-based filler alloy between them at temperatures above 800°F (425°C) but below the melting point of the parts being joined. The molten filler flows into the joint by capillary action and forms a strong bond when it cools, without melting the base metals.
Plain English
A way of joining two pieces of metal by melting a silver-containing filler that flows into the gap between them and hardens, sticking the pieces together without melting the pieces themselves.
Context Anchor
Seen in aircraft maintenance and repair when joining small metal parts, tubing, fittings, or components where a strong, clean joint is needed without melting the parts themselves.
Derivation
Brazing comes from an Old English word for 'to make of brass,' originally referring to joining metals using a brass-based filler. 'Silver' is added because the filler alloy contains silver, which lowers the melting temperature and produces a stronger, more flexible joint than brass-based brazing.
Why Pilots Care
Produces high-strength, leak-tight joints in critical aircraft systems without distorting or weakening the original metal parts.
Intuition Check
Silver brazing does not mean the whole joint is pure silver, and it is not welding. The silver-containing filler melts and flows into the joint; the parts being joined stay solid.
Example Sentence 1
The mechanic used silver brazing to join the two sections of stainless steel tubing in the fuel system.
Example Sentence 2
Mechanics often select silver brazing for fuel system fittings because it creates a reliable seal under pressure and vibration.