Ferritic-austenitic stainless steel

Details Ferritic-austenitic stainless steel Ferritic-austenitic stainless steel

C - Chemistry, Metallurgy

22

C

75/124

C22C 38/44 (2006.01) C22C 38/00 (2006.01) C22C 38/42 (2006.01)

Patent

CA 1243862

Abstract The present invention presents a ferritic-austenitic Cr-Ni-N-Steel alloy with a stable austenite phase, high corrosion resistance and good weldability, said steel alloy consisting essentially of the following elements by weight; max 0.06 % C, 21-24.5 % Cr, 2-5.5 % Ni, 0.05-0.3 % N, max 1.5 % Si, max 4.0 % Mn, 0.01-1.0 % Mo, 0.01-1.0 % Cu, the remainder being iron and normal impurities, the contents of said elements being balanced so that the ferrite content, ? , amounts to 35-65 %. The analysis of the steel is so optimized that it becomes especially useful for those environments where the steel is exposed to temperatures above 60°C and chloride amounts up to 1000 ppm whilst the alloy being stable towards deformation from austenite into martensite at a total deformation of 10-30 % in room temperature.

477068

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