FERRITIC STAINLESS STEEL PLATE WITH Ti AND METHOD FOR PRODUCTION THEREOF

摘要

A ferritic stainless steel plate added with Ti which has a chemical composition, in mass %: C: 0.01 % or less, Si: 0.5 % or less, Mn: 0.3 % or less, P: 0.01 to 0.04 %, S: 0.01 % or less, Cr: 8 to 30 %, Al: 1.0 % or less, Ti: 0.05 to 0.5 %, N: 0.04 % or less, with the proviso that 8 < Ti/(C+N) < 30, and the balance: substantially Fe and inevitable impurities, characterized in that it has a ferrite grain size of 6.0 or more and precipitates in the steel have an average diameter Dp [(length of major axis of a precipitate + length of minor axis of the precipitate)/2] of 0.05 to 1.0 mum; and a method for producing the steel plate. The ferritic stainless steel plate allows the reduction of the load on a refining step, and also has excellent working characteristics and a low yield strength.