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Per-kilogram prices of some synthetic radioisotopes range to trillions of dollars. ... ( mg / kg ) Price [7] Year Source Notes USD/kg ... Copper: 8.96: 60 (1. ...
Bronze is an alloy consisting primarily of copper, ... limiting supplies and raising prices. ... The tone ring is a heavy (usually 3 lb; 1.4 kg) folded or arched ...
Because of the low availability relative to demand, rhenium is among the most expensive industrial metals, with an average price exceeding US$6,000 per kilogram, as of mid-2009. It first traded in 1928 at US$10,000 per kilogram of metal, but traded at US$250 per Troy ounce in mid-2010. [82] It traded in July 2010, at about US$4,000–4,500/kg. [83]
Latten is a further term, mostly used for coins with a very high copper content. Today the term copper alloy tends to be substituted for all of these, especially by museums. [1] Copper deposits are abundant in most parts of the world (globally 70 parts per million), and it has therefore always been a relatively cheap metal.
Common weights were 50, 10, 5 and one tael. Before the year 1840 the government of the Qing dynasty had set the official exchange rate between silver sycees and copper-alloy cash coins was set at 1,000 wén for 1 tael of silver before 1820, but after the year 1840 this official exchange rate was double to 2,000 wén to 1 tael. [5]
We turned to the pros to get some clarity on what bronze-cut pasta is—and if it's worth the splurge.
Gunmetal ingot is a related alloy in which the zinc is replaced by 2% lead; this makes the alloy easier to cast but it has less strength. [2]Modified gunmetal contains lead in addition to the zinc; it is typically composed of 86% copper, 9.5% tin, 2.5% lead, and 2% zinc.
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