Ferritic stainless steel sheet and associated production method

Abstract

The invention relates to a ferritic stainless steel sheet the composition of which comprises, the contents being expressed by weight: C ≤ 0.03 % 0.25 % ≤ Mn ≤ 1 ⁢ % , preferably 0.3 % ≤ Mn ≤ 0.5 % 0 ⁢ % ≤ Si ≤ 0.2 % , preferably ⁢ Si ≤ 0.15 % with ⁢ Mn / Si ≥ 1.2 S ≤ 0.005 % P ≤ 0.04 % 19. % ≤ Cr ≤ 24. % Ni ≤ 0.5 % Mo ≤ 0.1 % N ≤ 0.03 % Cu ≤ 0.2 % 0.4 % ≤ Nb ≤ 1. % 0.05 % ≤ Ti ≤ 0.2 % , preferably 0.05 % ≤ Ti ≤ 0.15 % Zr ≤ 0.02 % Al ≤ 0.02 % V ≤ 0.2 % Co ≤ 0.05 % Sn ≤ 0.05 % , Rare ⁢ earth ≤ 800 ⁢ ppm it being understood that: V + Zr + Al ≤ 0.2 % Ti + V + Zr + Al ≤ 0.3 % Ti + Nb ≤ 1. % Ni + Cu + Co ≤ 0.6 % 2 × Nb - 7 × C ≥ 0.8 % 0 ⁢ % ≤ Ti - 4 × N ≤ 0.15 % 0.2 ppm ≤ Ca ≤ 20 ⁢ ppm 1 ⁢ ppm ≤ O ≤ 60 ⁢ ppm the remainder of the composition consisting of iron and unavoidable impurities resulting from the preparation, the sheet being an annealed and pickled sheet, the sheet comprising a volume fraction of Fe2Nb Laves phases of less than 0.2%.

Dependencies are inferred from the claim text.