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terne metal
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terne metal

metallurgy
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Quick Summary

Terne metal is an alloy primarily composed of lead and tin, typically in a ratio of four parts lead to one part tin. This alloy is used to coat steel sheets, creating a material known as terneplate. The tin in the alloy is crucial as it allows the lead to bond with the iron in the steel, which would otherwise not alloy.12

Terneplate combines the strength and formability of steel with the noncorrosive surface and solderability of the terne metal coating. Historically, it was used for roofing, gutters, downspouts, and automotive gasoline tanks, among other applications. However, it has largely been superseded by more durable and easier-to-manufacture steel products.2

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2 Britannica Sources
  1. terneplate
  2. terne

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