Patent ID: 6673166
Filing Date: 2004-01-06
Classification: C21D,C22C

Abstract:
A ferritic stainless steel sheet having good workability, which;consists essentially of C up to 0.03 mass %, N up to 0.03 mass %, Si up to 2.0 mass %, Mn up to 2.0 mass %, Ni up to 0.6 mass %, 9-35 mass % Cr, 0.15-0.80 mass % Nb and the balance being Fe except inevitable impurities, and has the metallurgical structure that Nb-containing precipitates of 2 &mgr;m or less in particle size, which have been generated by precipitation-treatment and consumed for control of crystalline orientation during finish-annealing, at a ratio not more than 0.5 mass %, said crystalline orientation being on a surface at Â¼ depth of thickness with Integrated Intensity defined by the under-mentioned formula (a) not less than 1.2. Integrated intensity=[I(211)/I0(211)]/[I(200)/I0(200)]â€ƒâ€ƒ(a) wherein, I(211) and I(200) represents diffraction intensities on (211) and (200) planes of a sample of said steel sheet measured by XRD, while I0(211) and I0(200) represents diffraction intensities on (211) and (200) planes of a non-directional sample.