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1943 steel cents are U.S. one-cent coins that were struck in steel due to wartime shortages of copper. The Philadelphia , Denver , and San Francisco mints each produced these 1943 Lincoln cents . The unique composition of the coin ( low-grade steel coated with zinc , instead of the previously 95%-copper-based bronze composition) has led to ...
The German Nazi Party looted and stole art, gold and other objects that had been either plundered or moved for safekeeping at various storage sites during World War II. These sites included salt mines at Altaussee and Merkers and a copper mine at Siegen .
After the outbreak of World War II, the demand for copper rose as it was used in ammunition and other military equipment. The US Mint researched ways to reduce or eliminate the usage of copper in cent production. The mint struck pattern coins in various metals, using the obverse design of the Colombian two centavo coin. [1]
The dispersion of the second phase can be achieved also with castable alloys (e.g., copper) with a low-melting-point metal insoluble in copper, such as bismuth, 1–5% lithium, or up to 50% (usually 15–30%) lead; the size of inclusions can be adjusted by thermal treatment.
Operation Copper was carried out by the Allied commando unit Z Special Unit, during World War II.The objective of the mission was to investigate the Japanese defences on Muschu Island, capture a Japanese officer for interrogation and discover the location of two naval guns on the island that covered the approaches to Wewak Harbour.
Matthew L. Basso, Meet Joe Copper: Masculinity and Race on Montana's World War II Home Front. Chicago: University of Chicago Press, 2013. Kent A. Curtis, Gambling on Ore: The Nature of Metal Mining in the United States, 1860–1910. Boulder, CO: University Press of Colorado, 2013.
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For the most demanding items even low-background steel can be too radioactive and other materials like high-purity copper may be used. [4] In cases where World War II–era shipwrecks in and near the relatively shallow Java Sea and western South China Sea have been illegally scavenged, it has been suggested that the target is low-background ...