Soft and malleable metal lead belongs to the group of heavy nonferrous metals with copper, tin and zinc. Among its main characteristics, it is possible to allocate a bad conductivity of electricity and heat. Humanity is familiar with this metal for several thousands of years, but widespread use began relatively recently. Is extracted from deposits intermetallic compounds. Major suppliers — the U.S., EU, Korea, China Today is the price on the world market a kilo of lead is 1.5 dollars. One of its main advantages stands chemical inertness and protection from gamma radiation, which explains the popularity of its use in the chemical industry, the nuclear industry and medicine.
|The specific weight of Pb||11,3415 g/cm3|
|Atomic mass||MYR 207.2|
|The degree of oxidation||0 +2, +4|
|Melting point||327,46 °C|
|The specific heat of fusion||4,77 kJ/mol|
Alloys of lead
They are divided into two categories — high and low. The first is alloy with special additives that increase resistance of metals to external influences. Such additives can increase anti-friction properties, change the melting temperature and shrinkage. For low-alloyed alloys include alloys with tin, Nickel, antimony, cadmium, copper, which enhance corrosion resistance in acidic environments and high humidity conditions. The addition of antimony or copper increases the strength, allow the use of alloy for the manufacture of building materials — sheets, rebar, pipes. Additives of tin makes it possible to manufacture low-voltage and power cables.
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To buy, best price
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