Ferritic stainless steel

C - Chemistry – Metallurgy – 22 – C

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C22C 38/50 (2006.01) C22C 38/44 (2006.01)

Patent

CA 1163470

1201 FERRITIC STAINLESS STEEL ABSTRACT OF THE DISCLOSURE A ferritic stainless steel characterized by superior toughness both prior to and after welding, and by superior crevice and integranular corrosion resistance. The steel consists essentially of, by weight up to 0.08% carbon, up to 0.06% nitrogen, from 25.00 to 35000% chromium, from 3.60 to 5.60% molybdenum, up to 2.00% manganese, between 2.00 and 5.00% nickel, up to 2.00% silicon, up to 0.5% aluminum, up to 2.00% of elements from the group consisting of titanium, zirconium and columbium, balance essentially iron. The sum of carbon plus nitrogen is in excess of 0.0275%. Titanium, zirconium and columbium are in accordance with the following equation. %Ti/6 + %Zr/7 + %Cb/8 ? %C + %N

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