Manganese-nickel-chromium alloy is used as filler metal in brazing of the stainless steel and nickel-base superalloys. The melting point of this alloy is in the range of 1080-1100 °C and is usually produced by casting in vacuum. In this study, the possibility of using mixture of manganese, nickel and chromium powders in atmospheric plasma spraying and powder flame spray for brazing of stainless steel has been evaluated. Appropriate weight percentages of the powders were mixed and spray coated on the surface of 304 stainless steel substrates. The powders used for plasma spray process were mechanically alloyed for 15 and 50 hours in two different energy planetary ball mills. Samples of the powders, after15 hours ball milling, were annealed at 800 °C for 5 h to form Mn(Ni) solid solution. For flame spraying the powders used of two different sizes were prepared in order to examine the effect of particle size on the rate of oxidation. Experimental results showed that in both conditions, the phases formed were similar, but the amount of phases was different. In the atmospheric plasma spray coatings, the phases in mechanical alloyed powder for 15 h and annealed powder were similar and include manganese oxide, nickel, solid solution Mn(Ni), Mn Y Ni 1-Y O and NiMn 2 O 4 oxides. In both processes, the powders reacted with oxygen and formed manganese oxide phases including MnO and Mn Y Ni 1-Y O, leading to increase in the melting point of coatings. Thus, annealing in the temperature range of 1080-1200 °C caused only superficial and partial melting. From the experimental results, it was concluded that, due to excessive oxidation, neither atmospheric plasma spraying nor powder flame spray process can be used in brazing of conventional manganese-nickel-chromium alloy. Keywords : flame spray, plasma spray, mechanical alloying, spray and fuse, braizing, manganese-nickel alloy.