Wootz steel
Wootz steel is a type of high-carbon crucible steel historically produced in South India and Sri Lanka, known for its strength, sharpness, and characteristic banded microstructure.Srinivasan, Sharada (1994). "Wootz crucible steel: a newly discovered production site in South India". Institute of Archaeology. It originated by at least the mid-1st millennium BCE and was widely exported across Asia, the Middle East, and Europe.Craddock, Paul (2003). Early Metal Mining and Production. Edinburgh University Press.
Wootz steel is characterized by high carbon content, typically between 1.0% and 2.0%, and distinctive banding patterns formed by carbide segregation during slow solidification and forging.Verhoeven, John D. (2001). "The Key Role of Impurities in Ancient Damascus Steel Blades". JOM. Historically, wootz steel ingots were exported and forged into Damascus steel blades in the Middle East, which became renowned for their mechanical performance and patterned appearance.Pendray, Alfred (2006). "Reconstruction of Damascus steel". Materials Characterization.