Wear behavior of AC4C and 4 composites under dry condition has been investigated with variations of applied pressure and sliding velocity at the room temperature. Wear volume loss was measured and worn surfaces, its cross sectional views and wear debris were observed to characterize the properties and the wear mechanism of AC4C and 4 composites. Results showed that AC4C and 2 composites fabricated with mixed powder of Al-10, and 20wt%Fe were observed mechanically severe wear, but Al-30, 40wt%Fe did stable wear pattern in the change of wear volume loss on the variation of contact pressure and sliding velocity. The behavior of wear is the transition from mild to severe wear accompanied by surface-layer removal as a result of melting Al matrix because of friction heat at the localized spot between specimen and counterface.