Iron is one of the three magnetic metals (the others being cobalt and nickel).
Iron from the Blast furnace contains about 5% carbon which comes from the coke in the furnace.
–It is
therefore extremely brittle which means it is prone to shatter or crack.
–However, it has a greater resistance to corrosion than either pure
iron or steel.
It is cast into moulds called pigs, and the iron is called cast iron or pig iron.
–Cast
iron finds use as manhole covers.