Sungai Besi (formerly known as Sungei Besi) (English: Steel River) is a town and suburb within the Federal Territory of Kuala Lumpur. It was also a federal constituency in Kuala Lumpur from 1974 to 1995. Sungai Besi was a historical mining town with many heavy industries such as steelworks, waste steel plants and other steel industries. Sungei Besi Tin Mine site was the largest and deepest open cast alluvial tin mine in the world and in Malaysia. The town has since developed from a large area of village settlements.