Nitrogen alloyed austenitic stainless steels exhibit attractive properties such as high levels of strength and ductility, good corrosion resistance and reduced tendency to grain boundary sensitization [1]. The high austenitic potential of nitrogen in steel allows the reduction of nickel content, offering additional advantages such as reduction of allergic risks and costs saving. The production of these low nickel steels is made possible by the addition of manganese which increases N solubility in the melt and decreases the tendency to Cr2N formation [2]. Moreover, since nitrogen increases the stability of the austenitic phase against martensite formation [3], nitrogen alloyed austenitic stainless steels can be strengthened by cold working without formation of strain induced martensite. This results in higher mechanical properties and in a good balance between toughness and tensile properties. Specific potential applications of this new family of steels include automotive hose clamps, safety belt anchors, truck and bus frames, water supply and control structures, sewage treatment plant structures, bulk solids handling equipment, magnetic ore separator screens, coal buckets and hopper cars. Moreover, stainless steels have served successfully in many structural components in the transportation industry. In particular bus frames and bumpers can take advantage of the high strength of this new family of stainless steels. In previous reports we examined the influence of the grain size and of the chemical composition on the mechanical, corrosion and wear resistance of this family