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Cu
Cuprum

History

 Copper was one of the first metals used by people for weapons. Archaeologists find various boards, spearheads, etc. The first alloy, which people started to do was bronze (copper and tin). It also has long been known two copper alloy: brass, copper containing up to 68% applied for the casings, and red brass containing copper from 88% to 97% and applied to the radiator pipes, clad steel, etc.

Nowadays

 The main use of copper found in electrical engineering, where the conductivity second only to silver. The electrical resistance of the copper in 2 times less than that of aluminum, and 6 times than that of iron. Also of great use of copper found in the production of pipes, a wide range of applications. Some countries are using copper for the manufacture of coins. In today's copper coins is added to 4.5% - 5.5% aluminum.

Date ASIA EUROPE USA
26/12/2009 8374.3 7069 7101.74
19/12/2009 8108.52 6900 6870.25
12/12/2009 7939.82 6900 6869.15
05/12/2009 7770.64 7070.5 6981.37
28/11/2009 7879.43 7169.49 7079.11
21/11/2009 7769.69 6760 6862.76
14/11/2009 7416.83 6388.2 6317.69
07/11/2009 7533.86 6489 6417.38
31/10/2009 7351 6331.5 6261.62
24/10/2009 7497.29 6457.5 6386.23
17/10/2009 7170.25 6076 6234.44
10/10/2009 7244.75 6241 6226.72
02/10/2009 6980.32 6318.9 6249.16
25/09/2009 6935.5 6089 6935.5
18/09/2009 7325.4 6309.45 6239.82
12/09/2009 7314.43 6300 6230.47
05/09/2009 7351 6331.5 6261.62
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