Nitrogen alloying in martensitic stainless steels has been considered as an alternative to improve mechanical properties and corrosion resistance. The use of conventional melting and solidification processes is not the most efficient way to produce high nitrogen steels (HNS) since nitrogen solubility in melt is quite low. Nowadays, HNS is being produced by Powder Metallurgy and, in this case, the nitrogen is alloyed in the solid state, especially considering reactions between high nitrogen sintering atmospheres and pre alloyed pressed bodies. This paper investigates another possibility regarding the introduction of nitrogen in stainless steel, i.e., the use of high nitrogen chromium powders (nitrided powders) mixed with ordinary atomized iron powder. This mixture was pressed and sintered at 1350 degreesC for 2 and 8 hours. As reference, two other set of "nitrogen free" samples were produced and characterized: sintered pre-alloyed 434L stainless steel (commercial powder); sintered pre mixed Fe + "nitrogen free" Cr. The discussion was based on shrinkage during sintering, microstructural aspects and corrosion resistance.