STEEL
•Steel is defined as a hard-strong alloy consisting principally of iron and
containing carbon and sometimes other metals.
•Steel is an alloy of iron and carbon and other elements. Because of its
high tensile strength and low cost, it is a major component used in
buildings, infrastructure, tools, ships, automobiles, machines, appliances,
and weapons.
•Carbon steel is one alloy that is prized in the construction industry for its
hardness and strength. It is typically used to make beams for structural
framework, plates for highway construction, and rectangular tubing for
welded frames trailer beds, and bridges.
•Several types of steel are used in construction, depending on the
application. For steel structures, mostly mild steel is used, though there
has been some increase in the use of high tensile steel, and corrosion
resistant steel.
•When iron is smelted from its ore, it contains more carbon than is
desirable. To become steel, it must be reprocessed to reduce the carbon to
the correct amount, at which point other elements can be added.To make
steel, iron ore is first mined from the ground. It is then smelted in blast
furnaces where the impurities are removed and carbon is added. In fact, a
very simple definition of steel is "iron alloyed with carbon, in required
proportion."
Chemical Composition of Mild Steel:
•CARBON 0.16 to 0.18 % (maximum 0.25% is allowable)
•MANGANESE 0.70 to 0.90 %
•SILICON maximum 0.40%
•SULPHUR maximum 0.04%
•PHOSPHOROUS maximum 0.04%
STEEL SCRAP
Steel is, in fact, the most recycled material in the world with scrap accounting
for 40 per cent of the global steel production.
As the metal recycling industry continues to grow, I'm sure there will be even
more uses found for scrap metal in the future. Recycling is just the smart thing
