Wood’s Metal

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Wood’s Metal
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Wood’s metal is a shiny metallic grey alloy of bismuth, lead, cadmium and tin named after the American metallurgist, B. Wood. The combination of these four different metals forms a eutectic alloy in which the melting point is lower than each of the materials’ individual melting points. Because this silvery shiny grey alloy melts at 70°C it is usually found in fire sprinkler valves; in the event of a fire, the valve melts and allows water to flow out of the system. Among other applications, Wood’s metal is often used as a low-melting solder and as a casting metal. It is also used as a filler when bending metallic tubes, as it can be easily removed by being heated in boiling water. Due to its lead and cadmium content this material is toxic and it is thought to be harmful when coming in contact with skin.

Sample ID: 205

Particularities

Chemical symbol
Bi, Cd, Pb, Sn
State
Solid
Compound
Maker
MUTR
Selections
Categories
Metal
Curiosities
Relationships
Alloy | Eutectic | Solder | Sprinkler | Toxic

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