SAIL is a Maharatna central public sector enterprise that is the largest steel producer in India.It has five integrated steel plants at Bhilai, Rourkela, Durgapur, Bokaro and Burnpur (Asansol) and three special steel plants at Salem, Durgapur and Bhadravathi.It also owns a Ferro Alloy plant at Chandrapur.Annual production of SAIL capacity is 18.29 million metric tons.