Bhilai is a city in the Durg district of Chhattisgarh, in eastern central India. As of 2001, it had a population of 556,366. The city is located 25 kilometres (16 mi) west of the capital Raipur, on the main Howrah–Mumbai rail line, and National Highway 6. Bhilai is famous for the Bhilai Steel Plant, which is the largest steel plant in India and known for being the only manufacturer of rails in the country used by Indian Railways.