IRON                  Iron in its pure state is soft, malleable and ductile (that can be stretched, drawn or hammered thin without breaking ((Webster's Dictionary, 419, 1988)) with a hardness of 4-5. It is easily magnetized at room temperatures and this property disappears when heated above 790 degrees Celsius.. Metal iron occurs in a free state in only a few localities, notably Greenland (Encarta, 1996). One of the physical properties of iron as an ore is its color which can be …showed first 75 words of 1054 total…

…showed last 75 words of 1054 total…these. Today blast furnaces that use blasts of air heat the iron with ferroalloys to produce steel. (Encarta, 1996). The steel is then shaped into screws which are used to hold the face mask on the shell of the football helmet. Steel is used for this purpose due to its strength. The physical properties of iron are totally changed once it has become steel and therefore good to make screws as it will no longer rust.