(57) Abstract As for this invention, as for the said aluminum - manganese - silicon - nitrogen austenite stainless steel acid proof steel it consists of the component below chrome and in regard to the aluminum - manganese - silicon - nitrogen austenite stainless steel acid proof steel where neither nickel component with respect to substance is included: 0.06 - 0.12 carbons, 4 - 5 aluminum, 16 - 18 manganese, 1.2 - 1.5 silicon, 0.15 - 0.30 nitrogen, 0.1 - 0.2 rare metal and remainder iron. From corrosion-resistant and machine quality of the steel of this invention it is possible by the small quantity adding the element which is chosen from the group which includes the chrome, the nickel, the cobalt, titanium, niobium, the copper, the molybdenum, zirconium, hafnium, the tungsten and the element which is similar in these, to improve more. The stainless steel of this invention, has satisfactory corrosion-resistant, pressure process quality and melting efficiency, it is possible because of this to produce the various stainless steel steel items, in addition use is possible in extensive field.
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