| 摘要 |
PROBLEM TO BE SOLVED: To provide a new high-strength ferritic stainless steel having excellent corrosion resistance in the weld heat affected zone, which has no defects in workability, welding softening, surface defects or the like. SOLUTION: In the high strength ferritic stainless steel for a welding operation having no gaps described in claims 1, 2, 3 is characterized in that to a test piece obtained by making a steel into a cold rolled-annealed-pickled steel sheet, and thereafter subjecting the steel sheet to TIG welding in the air, the average Cr ratio of the oxide scale in a base metal weld heat affected zone is≥25 mass% in the ratio of all the metallic elements. COPYRIGHT: (C)2011,JPO&INPIT
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