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US Coastguard Bronze Medal Commemorative

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United States
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 Posted 08/04/2019  2:55 pm Show Profile   Bookmark this topic Add HappyHippo to your friends list Get a Link to this Message Number of Subscribers
Since when is bronze made of copper and zinc? I was taught that is brass. Bronze, I thought is comprised of copper and tin. US Mint doesn't know this? Or is the definition changed?
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oriole's Avatar
Canada
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 Posted 08/04/2019  7:35 pm  Show Profile   Bookmark this reply Add oriole to your friends list Get a Link to this Reply
You are correct. The definitions have not changed.
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 Posted 08/08/2019  9:51 pm  Show Profile   Bookmark this reply Add Ballyhoo to your friends list Get a Link to this Reply
Bronze

Bronze is an alloy that consists primarily of copper with the addition of other ingredients. In most cases the ingredient added is typically tin, but arsenic, phosphorus, aluminum, manganese, and silicon can also be used to produce different properties in the material. All of these ingredients produce an alloy much harder than copper alone.

Silicon Bronze

This is an alloy that can cover both brass and bronze (red silicon brasses and red silicon bronzes). They typically contain 20% zinc and 6% silicon. Red brass has high strength and corrosion resistance and is commonly used for valve stems. Red bronze is very similar but it has lower concentrations of zinc. It is commonly used in the manufacturing of pump and valve components.

Taken from a metallurgy site.

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