EP 3006585 B1 20190501 - SEAMLESS STEEL PIPE FOR LINE PIPE USED IN SOUR ENVIRONMENT
Title (en)
SEAMLESS STEEL PIPE FOR LINE PIPE USED IN SOUR ENVIRONMENT
Title (de)
NAHTLOSES STAHLROHR FÜR EIN LEITUNGSROHR IN EINER SAUREN UMGEBUNG
Title (fr)
TUBE EN ACIER SANS SOUDURE DESTINÉ À UN TUBE DE CANALISATION UTILISÉ DANS UN ENVIRONNEMENT ACIDE
Publication
Application
Priority
- JP 2013115135 A 20130531
- JP 2014002662 W 20140521
Abstract (en)
[origin: EP3006585A1] There is provided a seamless steel pipe which is used in line pipe applications, which line pipe is used in sour environments, and is not subjected to quenching and tempering treatment, and in which the occurrence of blisters can be suppressed. The seamless steel pipe according to this embodiment has a chemical composition consisting, in mass% of, C: 0.08 to 0.24%, Si: 0.10 to 0.50%, Mn: 0.3 to 2.5%, P: 0.02% or less, S: 0.006% or less, Nb: 0.02 to 0.12%, Al: 0.005 to 0.100%, Ca: 0.0003 to 0.0050%, N: 0.0100% or less, O: 0.0050% or less, Ti: 0 to 0.1%, V: 0 to 0.03%, Cr: 0 to 0.6%, Mo: 0 to 0.3%, Ni: 0 to 0.4%, Cu: 0 to 0.3%, and B: 0 to 0.005%, the balance being Fe and impurities, has a structure consisting of ferrite and pearlite, and also has a yield strength of 350 to less than 450 MPa.
IPC 8 full level
C22C 38/00 (2006.01); C21D 8/10 (2006.01); C21D 9/08 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/12 (2006.01); C22C 38/14 (2006.01); C22C 38/16 (2006.01); C22C 38/18 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP)
C21D 8/10 (2013.01); C21D 8/105 (2013.01); C21D 9/085 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); C22C 38/16 (2013.01); C22C 38/18 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/50 (2013.01); C22C 38/54 (2013.01); C22C 38/58 (2013.01); C21D 2211/005 (2013.01); C21D 2211/009 (2013.01)
Citation (examination)
KLINKENBERG,C.: "niobium carbide in precipitaton microalloyed steel", STEEL RESEARCH INT`L, vol. 75, no. 11, 10 August 2004 (2004-08-10), pages 744 - 752
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3006585 A1 20160413; EP 3006585 A4 20170301; EP 3006585 B1 20190501; EP 3006585 B8 20190821; AR 096272 A1 20151216; CN 105283572 A 20160127; CN 105283572 B 20171215; JP 5915818 B2 20160511; JP WO2014192251 A1 20170223; MX 2015016413 A 20160303; SA 515370210 B1 20180826; WO 2014192251 A1 20141204
DOCDB simple family (application)
EP 14803329 A 20140521; AR P140101921 A 20140513; CN 201480031110 A 20140521; JP 2014002662 W 20140521; JP 2015519628 A 20140521; MX 2015016413 A 20140521; SA 515370210 A 20151129