In this paper, the cladding of pure aluminum and a low-carbon steel alloy was performed through friction stir processing with minimal intermetallic compound formation. A 3 mm thick plate clamped on top plate. thick, copper used as backing The tool pin length adjusted to be same upper plate’s thickness (3 mm) longer than 3.2 mm. effect rotation speed (500–1500 rpm) cladding’s quality, microstruc...