Metals and alloys properties and behaviour during manufacturing and their performance during their service life depend on their processing history, composition, structure as well as on the heat treatment to which they have been subjected. Strength, ductility, hardness, toughness and resistance to wear such important properties are greatly influenced by alloying elements and heat treatment processes. Heat-treatment is one of the most common example of a process to improve properties by modifies microstructures and therefore a variety of mechanical properties are able to produce which are important in manufacturing. Which leads to improving of machinability and formability or increased hardness and strength for tools and dies.