Steel Authority of India Limited (SAIL) is one of the largest state-owned steel making company of India and one of the top steel makers in world. It is a public sector undertaking. SAIL operates and owns five integrated steel plants at Bhilai, Rourkela, Durgapur, Bokaro and Burnpur and 3 special steel plants at Salem, Durgapur and Bhadravathi. It also owns a Ferro Alloy plant at Chandrapur. As part of its global ambition, the company is undergoing a massive expansion and modernisation programme involving upgrading and building new facilities with emphasis on state of the art green technology.