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STEEL
An iron alloy containing up to approximately 2% of carbon. Other
trace elements may also be present like silica, manganese, nickel,
chrome, molybdenum, sulfur and phosphorus. The properties of the
steel depend strictly on the chemical composition of the material. |
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SILVER
Pure silver is a very soft, ductile and malleable metal, so much
so that is can be reduced to sheets so thin that they are transparent
against the light. Considerable quantities of silver are required
by the mints for manufacturing coins and medals.
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BRONZE
A copper-tin alloy, with or without the same addition of other elements
like zinc, lead, nickel and phosphorus. Other copper alloys in
which there may be small percentages of tin additions, are also
called bronze: aluminium bronze (cupraluminium), with beryllium
(cuproberyllium); with manganese (cupramanganese), and silica,
etc.
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OTHER
ALLOYS
In particular, ALUMINIUM – the third element in order of abundance
among the elements making up the earth’s crust, though extremely
scarce in the free state, universally obtained via the electrolysis
of aluminium which is very light, with excellent conductivity and
mediocre mechanical properties – and BRASS – a copper-zinc
alloy characterized by its solubility which increases and decreases
the temperature. |
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