Automobiles, locomotives, ships, beams used in buildings, furniture, paper clips, tools, reinforcing rods for concrete, bicycles, and thousands of other items.
Learn about the uses and properties of iron and steel and how they’ve been used throughout history. Find out what wrought and cast iron are, why your bike rusts, what the Earth’s core contains, what country produces the most iron, examples of iron rich foods and much more with our fun iron and steel facts. Gas giant plants such as Saturn and Jupiter have cores that are rich in iron. Iron is the 6th most common element found in the Universe. Steel is a well known and commonly used alloy made from iron and a small amount of carbon (or sometimes other elements). The amount of carbon is small (usually between 0.2% and 2.0%) but it makes a huge difference to the strength 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 is by mass the most common element on Earth, forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust. Pure iron is relatively soft, but is unobtainable by smelting. The material is significantly hardened and strengthened by impurities, in particular carbon, from the smelting process. A certain proportion of carbon (between 0.002% and 2.1%) produces steel, which may be up to 1000 times harder than pure iron. Broadly speaking, steel is an alloy of iron that contains up to about 2 percent carbon, while other forms of iron contain about 2–4 percent carbon. In fact, there are thousands of different kinds of iron and steel, all containing slightly different amounts of other alloying elements. Most steel is made from pig iron (remember: that's an iron alloy containing up to 4 percent carbon) by one of several different processes designed to remove some of the carbon and (optionally) substitute one or more other elements. Other final products from the pig iron are alloys. An alloy is a combination of two or more elements, in which at least one is a metal. Most metals used for construction purposes are alloys. For example, steel is an alloy with iron and carbon being the primary elements. Generally, iron-carbon alloys with up to 2.1% carbon by weight are considered steel and iron-carbon alloys with greater amounts of carbon are cast iron.  1 Stainless steel is a very common type of steel. 2  Steel is made by combining iron with other metals. 3  Stainless steel is used in building parts, cooking pots and pans, cutlery and surgical equipment. Uses of Iron. 1  Iron catalysts are used in the Haber-Bosch Process to produce ammonia and the Fischer-Tropsch Process to convert carbon monoxide to hydrocarbons used for fuels and lubricants. 2  Iron metal is strong but is also quite cheap. 3  Therefore, it is the most common metal in use today. Stainless steel is a common type of steel used in a host of different products. It is created when iron is combined with other metals. It is 100% recyclable and is used in aircrafts and automobiles. The use of stainless steel and iron in this form makes every thing in our world today working perfectly fine. Cast iron is an important form that is used in manufacturing pots, pans, skillets, ovens, and trays. Cast iron has a heating element that is most appropriate for cookware, cooking items, and accessories. Stainless steel, meanwhile, is used in kitchen cutlery, appliances, and cookware. In a biological sense, iron is present in the heme groups of hemoglobin and is used as the binding agent to which hemoglobin carries oxygen molecules to all cells of the body. It also (to a lesser degree) transports carbon dioxide from the cells to the lungs for expiration.  Iron (Fe) is the second most common metal on Earth, and the most widely-used metal. It is element 26, a transition metal in Group 8. Its symbol is Fe, from the Latin word for iron, ferrum. Its atomic number is 26 and its mass number is 55.85. It is used a lot because it is very strong and cheap.  The primary use of iron ore is in the production of iron. Most of the iron produced is then used to make steel. Steel is used to make automobiles, locomotives, ships, beams used in buildings, furniture, paper clips, tools, reinforcing rods for concrete, bicycles, and thousands of other items. 
http://www.sciencekids.co.nz/sciencefacts/metals/iron.html https://en.wikipedia.org/wiki/Iron http://www.explainthatstuff.com/ironsteel.html http://www.constructionknowledge.net/metal/metal_structural_steel.php http://wanttoknowit.com/uses-of-iron/ http://www.usesof.net/uses-of-iron.html http://www.answers.com/Q/What_is_iron_used_for https://simple.wikipedia.org/wiki/Iron http://geology.com/rocks/iron-ore.shtml
what is iron steel used for