![]() Pure iron or pristine have a surface that is smooth and have a finish like a silvery-grey mirror. Steel, stainless steel, cast iron and special steel are the iron alloys that became far more common industrial elements in the modern age because of their suitable mechanical properties and low cost. This time was considered as the transition period of the Bronze age to the Iron age. In Eurasia in about 2000 BCE, human beings mastered the technique of smelting iron and in about 1200 BCE the copper alloys were replaced by iron weapons in many of the regions. But in contrast to it, iron is found in abundance in form of iron ore, the purification of which needs furnaces and kilns whose temperature needs to be higher up to 1,500 ☌ (2,730 ☏) which is about 500 ☌ (900 ☏) higher than the temperature required for smelting of copper. Iron in pure metallic form is very rare in the earth’s crust and could only be found in the form of the deposition of meteorites. ![]() It forms most of the inner and other core of the earth and is considered the fourth common element of the earth’s crust. It is one of the most common elements that is found in the earth's crust and accounts for 32.1% just right before oxygen which accounts for 30.1%. It is a metal that belongs to group 8 and is a part of the first transition series in the periodic table. ![]() Fe is the symbol of the chemical element iron that has an atomic number 26. ![]()
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