Definition
A high-strength solder alloy containing silver, used to join metal parts at temperatures above 800°F (427°C). Silver solder produces joints stronger and more heat-resistant than ordinary tin-lead soft solder, and is commonly used on copper, brass, and steel components in aircraft systems such as fluid lines and fittings.
Plain English
A type of metal-joining material made with silver in it. It melts at a much higher temperature than regular solder and creates a much stronger bond, which is why it's used where joints have to handle pressure, heat, or vibration.
Context Anchor
Seen in aircraft maintenance and repair instructions when small metal parts must be joined by heat rather than by welding, riveting, or bolting.
Derivation
From the silver content of the alloy. Silver raises the melting point and bond strength compared to ordinary tin-lead solder, so the name simply identifies what makes this solder different from the everyday kind.
Why Pilots Care
Provides reliable, high-temperature joints in critical systems such as fuel lines and hydraulic lines where vibration and pressure demand strength beyond ordinary solder.
Intuition Check
Do not assume silver solder means pure silver. Do not assume it is the same as soft electrical solder; in maintenance use, it usually means a stronger, higher-temperature joining material.
Example Sentence 1
The mechanic used silver solder to repair the small crack in the copper fuel line fitting.
Example Sentence 2
Silver solder holds up better than soft solder in high-vibration areas around the engine compartment.