Stainless steel is acomplex alloyed steels, resistant to rust in atmospheric conditions and corrosion in harsh environments. Major alloying element of stainless steel - Cr (12-20%); moreover, stainless steel contains elements related to its iron alloys (C, Si, Mn, S, P), as well as elements introduced into the steel to give it the necessary physical and mechanical properties and corrosion resistance (Ni, Mn, Ti, Nb, Co, Mo). The higher the Cr content in the steel the greater its resistance to corrosion; a Cr content exceeding 12% alloys are stainless in normal conditions and slightly aggressive environments, more than 17% - corrosion resistant and more aggressive oxidizing et al. environments, particularly in nitric acid strength of up to 50%.


Corrosion resistance of weathering steel due to the fact that the surface of contact with the environment the chromium alloy is formed thin protective oxide film or the like. Of great importance in this case are: the uniformity of the metal corresponding to the surface condition, the lack of steel tendency to intergranular corrosion. Excessively high voltage parts and cause equipment corrosion cracking in some corrosive environments (particularly in environments corrosion cracking in some corrosive environments (particularly in environments containing chlorides), and sometimes leads to breakage. The strong acids (sulfuric, hydrochloric, hydrofluoric, phosphorous, and mixtures thereof) show a high corrosion resistance stainless steel complexly and alloys with a high content of Ni with additives of Mo, Cu, Si in various combinations. Moreover, for each specific conditions (temperature and concentration of the media) to select the appropriate grade of stainless steel.


The chemical composition of stainless steel divided into chromium, chromiumnickel(more than 100 marks). The structure chromium weathering steels are classified into martensitic, ferritic and poluferritnye. The best corrosion resistance is chromium martensitic stainless steel type in a polished state. Chromium stainless steels are used as a structural material for valves of hydraulic presses, turbine blades, valves crackers, cutting tools, springs, and household items.


More information and product specifications can be found in the Metal Catalogue.

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