Ti-containing ferritic stainless steel sheet for exhaust pipe flange parts, manufacturing method and flange part

摘要

Provided is a thickness gauge steel sheet of a ferritic stainless steel containing Ti for exhaust pipe flange parts excellent in toughness and workability. The steel sheet according to any one of claims 1 to 3, wherein the steel sheet contains 0.003 to 0.030% of C, 2.0% or less of Si, 2.0% or less of Mn, 0.050% or less of P, 0.040% or less of S, 10.0 to 19.0% And a balance of Fe and inevitable impurities, wherein the following K value is 150 or more, and the content of Fe is in the range of 0.07 to 0.50%, Al: 0.010 to 0.20%, Mo: 0 to 1.50% A hardness of 170 HV or less, and a thickness of 5.0 to 11.0 mm. K value = -0.07 x Cr-6790 x Free (C + N) - 1.44 x d + 267. Here, Free (C + N) corresponds to the concentration of solid solution (C + N) (mass%) and d denotes the average crystal grain diameter (占 퐉).