Definition

Noun 1. A low-melting-point alloy: A metal alloy specifically designed to melt at a relatively low temperature. It is used in components where controlled melting is required for safety or joining purposes, such as in solder, safety plugs, and sprinkler system fuses.

Usage and Examples

• The plumber used fusible metal as solder to join the copper pipes without damaging them with excessive heat.
• The automatic sprinkler head contains a fusible metal link that melts in a fire, allowing water to flow.
• Safety valves in boilers often incorporate a plug made of fusible metal that will melt if the temperature becomes dangerously high.

Advanced Usage and Technical Context

• Fusible alloys: This is a common technical term for the broader category of metals with low melting points. Fusible metal is a type of fusible alloy used for specific engineering applications.
• Eutectic alloys: Many fusible metals are eutectic alloys, meaning they have a single, sharp melting point lower than that of their individual components. This property makes them highly reliable for safety devices.

Variants and Related Words

• Fusible alloy (n): The general category of low-melting-point alloys.
• Solder (n/v): A fusible metal alloy used to join metal surfaces. (Note: While all solder is a fusible metal, not all fusible metals are used as solder).
• Fusible link (n): A safety device consisting of a strip or wire of fusible metal that melts under predetermined conditions, breaking a circuit or releasing a mechanism.

Synonyms

• Low-melting-point alloy
• Soft solder (in the context of joining metals)

Related Concepts and Components

• Safety plug: A plug made of fusible metal used in pressurized systems like boilers.
• Sprinkler fuse: The component in a fire sprinkler head that holds the water valve closed; it typically uses a fusible metal link.
• Thermal fuse: An electrical safety device that contains a fusible metal element which melts to interrupt a circuit during overheating.

Noun

1. an alloy with a low melting point and used as solder and in safety plugs and sprinkler fuses