FERRITIC STAINLESS STEEL PIPE AND FERRITIC STAINLESS STEEL PIPE FOR AUTOMOTIVE EXHAUST SYSTEM PARTS

摘要

To provide a ferritic stainless steel pipe excellent in moldability and corrosion resistance, and a ferritic stainless steel pipe for automotive exhaust system parts.SOLUTION: There is provided a ferritic stainless steel pipe having a steel base material which is formed with a tubular form, and a weld zone, in which the steel base material contains, by mass%, C:0.001 to 0.020%, Si:0.01 to 1.00%, Mn:0.01 to 1.00%, P:0.010 to 0.040%, S:0.0003 to 0.0050%, Cr:10.0 to 20.0%, N:0.001 to 0.020%, B:0.0002 to 0.0020%, Al:0.005 to 0.300%, Mg:0.0002 to 0.0030% and Sn:0.005 to 0.500% and further one or two kind of Ti:0.05 to 0.70% and Nb:0.05 to 0.70%, maximum Sn concentration of a Sn segregation part in the weld zone is 0.010% or more and n value of an area containing the weld zone is 0.15 or more.SELECTED DRAWING: None