EP 1876254 A1 20080109 - THICK SEAMLESS STEEL PIPE FOR LINE PIPE AND METHOD FOR PRODUCTION THEREOF
Title (en)
THICK SEAMLESS STEEL PIPE FOR LINE PIPE AND METHOD FOR PRODUCTION THEREOF
Title (de)
DICKES NAHTLOSES STAHLROHR FÜR LEITUNGSROHR UND HERSTELLUNGSVERFAHREN DAFÜR
Title (fr)
TUBE EN ACIER EPAIS SANS SOUDURE POUR TUYAU DE CANALISATION ET SON PROCEDE DE PRODUCTION
Publication
Application
Priority
- JP 2006304613 W 20060309
- JP 2005095240 A 20050329
Abstract (en)
A heavy wall seamless steel pipe for line pipe with a high strength and increased toughness, which has a chemical composition, by mass%, that consists of C: 0.03 to 0.08%, Si: not more than 0.25%, Mn:0.3 to 2.5%, Al: 0.001 to 0.10%, Cr: 0.02 to 1.0%, Ni: 0.02 to 1.0%, Mo: 0.02 to 1.2%, Ti:0.004 to 0.010%, N:0.002 to 0.008%, and 0.0002 to 0.005%, in total, of at least one selected from Ca, Mg and REM, and the balance Fe and impurities, optionally including V: 0 to 0.08%, Nb: 0 to 0.05% or Cu: 0 to 1.0%,and that P and S among impurities are not more than 0.05% and not more than 0.005% respective ly. It may contain 0.0003 to 0.01% of boron. A manufacturing method thereof is characterized by cooling rate, heating condition for piercing, and heat treating after pipe making.
IPC 8 full level
B21B 19/04 (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); C22C 38/06 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/50 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP US)
C22C 38/00 (2013.01 - EP US); C22C 38/001 (2013.01 - EP US); C22C 38/002 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/06 (2013.01 - EP US); C22C 38/42 (2013.01 - EP US); C22C 38/44 (2013.01 - EP US); C22C 38/46 (2013.01 - EP US); C22C 38/50 (2013.01 - EP US); C22C 38/58 (2013.01 - EP US); B21B 19/04 (2013.01 - EP US); B21B 23/00 (2013.01 - EP US); C21D 8/10 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 1876254 A1 20080109; EP 1876254 A4 20120801; EP 1876254 B1 20141112; AR 052706 A1 20070328; AU 2006229079 A1 20061005; AU 2006229079 B2 20090409; AU 2006229079 C1 20110317; BR PI0608953 A2 20100217; BR PI0608953 B1 20161011; BR PI0608953 B8 20170321; CA 2602526 A1 20061005; CA 2602526 C 20110816; CN 100543167 C 20090923; CN 101151387 A 20080326; JP 2006274350 A 20061012; JP 4792778 B2 20111012; NO 20074257 L 20071220; NO 340772 B1 20170619; US 2008047635 A1 20080228; US 2010236670 A1 20100923; WO 2006103894 A1 20061005
DOCDB simple family (application)
EP 06728830 A 20060309; AR P060101061 A 20060317; AU 2006229079 A 20060309; BR PI0608953 A 20060309; CA 2602526 A 20060309; CN 200680009884 A 20060309; JP 2005095240 A 20050329; JP 2006304613 W 20060309; NO 20074257 A 20070821; US 79148610 A 20100601; US 89513107 A 20070823