Ferritic stainless steel hot-rolled steel sheet excellent in cold cracking resistance and a method of manufacturing the same

摘要

The ferritic stainless steel hot-rolled steel sheet containing, by mass%, C: 0.0150% or less, Si: 0.01% ~2.00%, Mn: 0.01% ~2.00%, P: 0. less than 040%, S: 0.010% or less, Cr: 10.0% ~30.0%, Al: 0.001% ~0.100%, and N: not containing 0.0200% or less, respectively, and the balance There a steel composition consisting of Fe and unavoidable impurities, the thickness of 1 / 4-3 / 4 the length L of the entire grain boundary misorientation less 1 ° or 180 ° in cross-section in and heading difference 1 ° sub-boundaries length La of less than 15 ° is in a satisfying relationship La / L ≧ 0.20.