The goal of the present paper is to find friction between die and work piece. In this work, aluminum 6061 alloy with 5% volume fraction of Sic particle used. Al/SiC composites were produced by stir casting process. Extrusion die were used in three reduction ratios as (Inlet diameter: Outlet diameter) of 12:2, 8:4 and 4:2. Specimens were extruded at 3000C and constant strain rate of 0.002/Sec. Friction values to be determined in three dies and size effect to be studied. Extruded specimens Hardness, surface roughness and microstructure were compared with as cast specimens.