EP 2003215 A2 20081217 - METHOD FOR PRODUCTION OF MARTENSITIC STAINLESS STEEL PIPE
Title (en)
METHOD FOR PRODUCTION OF MARTENSITIC STAINLESS STEEL PIPE
Title (de)
VERFAHREN ZUR HERSTELLUNG EINES ROHRS AUS MARTENSITISCHEM NICHTROSTENDEM STAHL
Title (fr)
PROCEDE DE FABRICATION DE TUYAUX EN ACIER INOXYDABLE MARTENSITIQUE
Publication
Application
Priority
- JP 2007056853 W 20070329
- JP 2006094737 A 20060330
Abstract (en)
A method for producing martensitic stainless steel pipe containing by mass: 0.15 to 0.22% of C; 0.10 to 1.00% of Si; 0.10 to 1.00% of Mn; 12.00 to 14.00% of Cr; 0.01 to 0.05% of N; 0.020% or less of P; 0.010% or less of S; and the balance being Fe and impurities. The manufactured martensitic stainless steel pipe is cooled down to a range from 135 to 175°C on the pipe outer surface by air, and the edges of the pipe are then cut. This production method keeps the cracking susceptibility of the pipe at a low level, and cutting the pipe in the specified temperature range prevents forming cracks and burrs on the cutting surface.
IPC 8 full level
C21D 8/00 (2006.01); B21B 23/00 (2006.01); C21D 8/10 (2006.01); C21D 9/08 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01)
CPC (source: EP)
C21D 8/00 (2013.01); C21D 8/10 (2013.01); C21D 9/08 (2013.01); C22C 38/001 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/18 (2013.01)
Designated contracting state (EPC)
DE FR IT
DOCDB simple family (publication)
EP 2003215 A2 20081217; EP 2003215 A4 20130522; EP 2003215 A9 20090506; EP 2003215 B1 20140820; CN 101410535 A 20090415; CN 101410535 B 20101103; JP 2007270191 A 20071018; WO 2007114246 A1 20071011
DOCDB simple family (application)
EP 07740291 A 20070329; CN 200780010997 A 20070329; JP 2006094737 A 20060330; JP 2007056853 W 20070329