Source picture : http://hyperphysics.phy-astr.gsu.edu/
Pure iron is a metal but is very difficult found in this form on the surface of the earth. In order to obtain metallic iron, oxygen must be removed from naturally occurring ores by chemical reduction – mainly of the iron ore hematite (Fe2O3) by carbon at high temperature.
in other word, Pure iron is a bright silvery-white metal which oxidizes (rusts) rapidly in moist air or in water containing dissolved oxygen. It is malleable, soft, and ductile, and is strongly magnetic (ferromagnetic).
The properties of iron can be modified by alloying it with various other metals (and some non-metals, notably carbon and silicon) to form steels. Mechanical properties of iron and its alloys are traditionally evaluated using various measurements, such as Brinell test, Rockwell test, tensile strength and other; their results are so much consistent among each other that universal relations are often used to relate results of one measurement to another
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