In this study, the effect of tungsten on properties of Crofer 22APU stainless steel produced by mechanical alloying for using as interconnect plates of solid oxide fuel cells have been investigated. This alloy was produced by mechanical alloying for 40 h and in order to create a dense (bulk) sample from produced alloy powder with porosity less than 5%, method was used. In this method, for pressing the alloy powder, a 50 MPa stress and temperature of 1100 ° C were used during 10 min, and then, to achieve the desired properties of a metal interconnect suitable for using in solid oxide fuel cells, including low electrical resistance, high oxidation resistance and thermal expansion coefficient matching with other components of the cell, manganese-cobalt spinel coating was applied. This coating was deposited on Crofer alloy substrate by electrodeposition using current density of 150 mA/cm 2 in 40 min and following that, the properties of the alloy (coated and uncoated) including hardness, oxidation behavior and electrical resistance of the surface was examined. The oxidation behavior of the alloy, for both uncoated and coated from zero to 100 h of oxidation was in sinusoidal shape and obeyed no specific law. The electrical resistance of alloy without the coating after 100 h of oxidation was about 0.3 m?.cm 2 and for coated one, was less than this amount. After that, 0.2 wt% tungsten was added to the alloy and the mechanical alloying was continued for 80 h; all steps, including coating and evaluation of properties of coated and uncoated samples were analyzed as Crofer alloy. The alloy contain tungsten element showed higher hardness (~700 Vickers compared to ~100 Vickers for Crofer) and oxidation resistance respect to Crofer alloy. Area specific resistance of alloy with and without tungsten after 100 h oxidation was in the same range, but the alloy containing tungsten had a little more electrical resistance. The alloy produced by mechanical alloying compared to commercial one produced by casting showed a similar oxidation behavior after 100 h oxidation, but the area specific resistance of the sample produced by mechanical alloying was significantly less than the commercial one. Adding tungsten to alloy, improved all properties of the alloy required for using as interconnect plates in solid oxide fuel cells, whiles adding elements such as tungsten with melting temperature of 3422 ° C to Crofer22APU alloy trough casting is very difficult. Because the tungsten accelerated the formation of manganese-cobalt spinel on chromia, the depletion of chromium from alloy due to evaporation of chromium oxide on surface of the alloy was decreased. Keywords : Solid Oxide Fuel Cell, Interconnect plates , Crofer22APU, Mechanical alloying, Tungsten metal, Hardness, Oxidation, Area Specific Resistance