Iron is a chemical element with symbol Fe (from Latin: ferrum) and atomic number 26.
It is a metal in the first transition series.
It doesn’t found in nature in its free shape and (Fe) , even when purifying and deoxidation iron we can’t get 100% pure iron and it stays impured with carbon .
The amount of carbon that exists in iron #alloy determines alloy properties and its usage . when the carbon ratio rises the toughness rises .
Also the crystal system of iron and carbon atoms and atoms arrangement effects on alloy properties , so Fe-C phase diagram shows crystals systems in #iron-carbon
alloys in variable temperatures with carbon ratio to know alloy properties and its usage .
The #iron alloy that has up to 2.14% carbon is called #steel , and the its alloy that has (2.14%-6%) carbon is called #cast iron .
