Due to their special properties such as high strength, good wear resistance, low thermal expansion coefficient, and high oxidation resistance, aluminum matrix composites have found great applications in automobile, military, and aerospace industries nowadays. One of the new methods for the manufacturing of aluminum matrix composite materials is the infiltration of the melt into the metallic preforms through squeeze casting. In this research aluminum matrix composites reinforced with steel fiber preforms were produced through squeeze casting method. To prevent hazardous chemical reactions between steel fibers and aluminum base and also to increase the wettability of the fibers, a Ni-P coating was applied on the fibers by electroless process. Then, steel-aluminum composites with different weight percentages of steel fibers were prepared. The samples were cast at 750 0 C pouring temperature under 50, 75, 100, and 125 MPa pressures. Then, the physical and mechanical properties of the composites containing 3, 5, and 7 weight percent of steel fibers were studied in contrast to commercial pure aluminum. The results showed that by an increase in squeeze casting pressure from 50 MPa to 125 MPa, the porosity percentage of the pure aluminum sample reached zero and the specific strength or the ratio of strength to the weight of the composite containing 7 weight percent of steel fibers was about twice that of the pure aluminum. Also, hardness reached 52 Brinell for the composite sample with 7 weight percent of the fibers at 125 MPa from 19 Brinell for pure aluminum at 50 MPa. Moreover, by an increase in the weight percent of the steel fibers, the increased porosity and ductility are reduced. To study the tribology behavior of the samples, the wear tests were performed by the pin-on-disk machine. Wear tests were performed in dry conditions and under 1, 2, and 3 newton loads at sliding rate of 0.14 m/s. To recognize the dominant wear mechanism, the contact areas and the wear particles were studied by scanning electron microscope. The results obtained from the wear tests showed that the composite samples with more reinforcement enjoyed higher wear resistance attributed to an increase in resistance to plastic deformation of the composite samples in the presence of reinforcement steel fibers. Finally, it can be concluded that in applications requiring hardness, strength, or resistance to high wear, the use of pure aluminum-based composites containing proper weight percent of Ni-P coated steel fibers is logical and economically justified. Keywords : Aluminium matrix composite, Steel preform, Squeeze casting, Nickel-Phosphorous electroless plating, Physical and mechanical properties, Wear