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It was soon replaced with gilding metal to reduce metal fouling in the bore. Currently, cupronickel and nickel silver remain the basic material for silver-plated cutlery. It is commonly used for mechanical and electrical equipment, medical equipment, zippers, jewelry items, and both for strings for instruments in the violin family, and for ...
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Electrical, valves, pumps, oilfield tools, aerospace landing gears, robotic welding, mold making [3] Cold-rolled 104 110 5 B81 (Rockwell) Free-cutting brass Cu 62.0, Zn 35.5, Pb 2.5 Cold-drawn 44 70 18 B80 (Rockwell) Screws, nuts, gears, keys Nickel silver (ASTM B122) Cu 65.0, Zn 17.0, Ni 18.0 Annealed 25 58 40 70 Hardware Cold-rolled 70 85 4 170
Calx – calcium oxide; was also used to refer to other metal oxides. Chalcanthum – the residue produced by strongly roasting blue vitriol (copper sulfate); it is composed mostly of cupric oxide. Chalk – a rock composed of porous biogenic calcium carbonate. CaCO 3; Chrome green – chromic oxide and cobalt oxide.
16th century cupellation furnaces (per Agricola). Cupellation is a refining process in metallurgy in which ores or alloyed metals are treated under very high temperatures and subjected to controlled operations to separate noble metals, like gold and silver, from base metals, like lead, copper, zinc, arsenic, antimony, or bismuth, present in the ore.
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Mostly used for brazing reactive metals, e.g. beryllium and titanium. Does not significantly alloy with nor wet iron. Rarely used alone due to relatively high cost. 100: Pd 100: pure 1555 [75] Pure metal. High-temperature brazing of refractory metals. 100: Pt 100: pure 1767 – Very high temperature brazing. For refractory metals for high ...
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