Stainless Steel Essay

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2.4. Stainless Steel
Stainless steels are described as an iron base alloy, where it is called as inox or inox steel. Stainless steels are steel alloys which contain minimum 10.5 percentage of chromium content. On the surface of stainless steel a thin dense chromium oxide film will form to provide corrosion resistance and further prevents oxidation. Stainless steel is an inoxydable which means it can’t be readily oxidized (incapable of rusting). Stainless steel is notable because of its good corrosion resistance. Increase in Chromium content increases the corrosion resistance in stainless steels. Stainless steels are differing from carbon steels because of chromium content present in it. When compared with stainless steel, carbon steels are readily rusted when reveal to the combination of moisture and air. Due to sufficient chromium presented in stainless steels endure passivation. Further this passive film protects steel surface by blocking diffusion of oxygen and thus protects the bulk metal from corrosion. So stainless steels are used both in corrosion resistance and where strength of steel is required. Stainless steels are roll into tube, wire, bars, plates and sheets where used in surgical instruments, cookware, and in construction material for large
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They are
1. Austenitic stainless steel – austenite iron structure is stabilized when nickel is added with it. At low temperature such steel almost be low brittle and non magnetic due to this crystal structure. In stainless steel composition sufficient quantities of manganese has been added to preserves the austenitic structure in steel same as like nickel but cost is low.
2. Ferritic stainless steel - Ferritic stainless steels has good engineering properties when compared with austenitic stainless steel grades. In Ferritic stainless steel nickel and chromium content is low so it has low corrosion resistance. Ferritic stainless steels are normally less

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