aeroplane parts. Chrome steels are used for maufacturing cutting tools and crushing machines . . Applications of Cu Copper is the first metal used by the human and extended use of its alloy bronze resulted in a new era,'Bronze age' Copper is used for making coins and ornaments along with gold and other metals.
Copper and its alloys are used for making wires, water pipes and other electrical parts . . Applications of Au  Gold, one of the expensive and precious metals. It is used for coinage, and has been used as standard for monetary systems in some countries.
 It is used extensively in jewellery in its alloy form with copper. It is also used in electroplating to cover other metals with a thin layer of gold which are used in watches, artificial limb joints, cheap jewellery, dental fillings and electrical connectors.  Gold nanoparticles are also used for increasing the efficiency of solar cells and also used as catalysts. XII U1 Metallurgy - XII U1 Metallurgy - - - - - The Iron Pillar – Delhi: The Iron pillar, also known as Ashoka Pillar, is feet inches high, inches wide and weighs over kg.
The surprise comes in knowing its age, some years old,an iron column should have turned into a pile of dust long ago. Despite that, it has avoided corrosion for over the last years and stands as an evidence of the exquisite skills and knowledge of ancient Indians. A protective film was created through a complicated combination of the presence of raw and unreduced iron in the pillar and cycles of the weather, which helped to create a thin, uniform layer of misawite on the pillar. Misawite is a compound of iron, oxygen and hydrogen which does not rust and gives corrosion resistance.
Summary Metallurgy relates to the science and technology of metals. A naturally occurring substance obtained by mining which contains the metal in free state or in the form of compounds like oxides, sulphides etc... is called a mineral . minerals that contains