Wear is one of the destructive mechanisms which can deteriorate performance of many systems such as sliding components and gears in automobiles, airplanes and pumps. It causes the reduction of component life and reliability. The study of wear in nano materials is more important than other conventional materials, due to high surface to volume ratio and effect of parameters such as grain size, grain boundary, dislocation density and porosity on mechanical properties in nano scale. NiAl intermetallic is being recognized as a high temperature structural material because of its excellent oxidation resistance, high thermal conductivity, low density and high melting point. These properties have made NiAl a suitable material for coating different industrial components such as gas turbin engine, rotor blade and stator vanes to improve their wearing, corrosion and oxidation resistance. A number of attempts have been made to overcome this draw back. One of the possible routes is nanocrystallization of NiAl which may transform nominally brittle compound into a ductile material. In this work, Nanocrystalline NiAl powder was prepared by mechanical alloying and deposited on low carbon steel substrates by using high-velocity oxygen fuel (HVOF) technique. Then, nanoindentation test was carried out using diamond Berkovich indenter to find out the mechanical and surface properties of the coating such as hardness, Young?s module and Poisson ratio. Next, the wear tests were performed with a pin on block machine without lubrication under different load conditions in order to find out friction and wear behavior. Moreover, Global Incremental wear model (GIWM) and finite element technique were used to model the wear characteristics of the nanostructured material. GIWM was an incremental implementation of Archard’s wear model on the global scale for pin wear and block wear in a pin-on-block tribometer. Also, this work presented a computational study based on the linear Archard’s wear law and finite element modeling (FEM), in order to analyze unlubricated sliding wear. Such modeling was developed using finite element software Abaqus with 2-D and 3-D deformable geometries and elastic material behavior for the contact surfaces in pin on block experiments. Archard’s wear model was implemented into a FORTRAN user subroutine (UMESHMOTION) in order to describe sliding wear. Such implementation considered an incremental computation for surface wear based on the nodal displacements by means of adaptive mesh tools that rearrange local nodal positions. In this way, the worn track was obtained and new surface profile was integrated for mass loss assessments. The results indicated that GIWM was an approximate method and predicted pin-on-disc experiments to a limited extent, but it was a valid method for nanostructured materials with low wear coefficient. The results of FEM show that the volume losses obtained with the numerical analysis seem to be in good agreement with the experimental ones. Keywords: Wear, Nanostructured NiAl coating, Pin on block test, Wear simulation