EP 3533892 A1 20190904 - SEAMLESS PIPE OF MARTENSITIC STAINLESS STEEL FOR OIL WELL PIPE, AND METHOD FOR PRODUCING SEAMLESS PIPE
Title (en)
SEAMLESS PIPE OF MARTENSITIC STAINLESS STEEL FOR OIL WELL PIPE, AND METHOD FOR PRODUCING SEAMLESS PIPE
Title (de)
NAHTLOSES ROHR AUS ROSTFREIEM MARTENSITISCHEM STAHL FÜR EIN ÖLBOHRROHR UND VERFAHREN ZUR HERSTELLUNG EINES NAHTLOSEN ROHRS
Title (fr)
TUYAU SANS SOUDURE EN ACIER INOXYDABLE MARTENSITIQUE POUR TUYAU DE PUITS DE PÉTROLE ET PROCÉDÉ DE PRODUCTION DE TUYAU SANS SOUDURE
Publication
Application
Priority
- JP 2016208420 A 20161025
- JP 2017033008 W 20170913
Abstract (en)
Provided herein is a martensitic stainless steel seamless pipe, intended for oil country tubular goods, having high strength, and excellent sulfide stress corrosion cracking resistance. A method for producing such a martensitic stainless steel seamless pipe is also provided. The martensitic stainless steel seamless pipe for oil country tubular goods has a composition that contains, in mass%, C: 0.035% or less, Si: 0.5% or less, Mn: 0.05 to 0.5%, P: 0.03% or less, S: 0.005% or less, Cu: 2. 6% or less, Ni: 5.3 to 7.3%, Cr: 11.8 to 14.5%, Al: 0.1% or less, Mo: 1.8 to 3.0%, V: 0.2% or less, N: 0.1% or less, and the balance Fe and unavoidable impurities, and in which C, Mn, Cr, Cu, Ni, Mo, W, Nb, N, and Ti satisfy the predetermined relations.
IPC 8 full level
C22C 38/00 (2006.01); C21D 8/10 (2006.01); C21D 9/08 (2006.01); C22C 38/46 (2006.01); C22C 38/52 (2006.01)
CPC (source: EP US)
C21D 8/105 (2013.01 - EP US); C21D 9/085 (2013.01 - EP US); C22C 38/00 (2013.01 - EP US); C22C 38/001 (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 38/48 (2013.01 - EP US); C22C 38/50 (2013.01 - EP US); C22C 38/52 (2013.01 - EP US); C21D 2211/008 (2013.01 - EP US)
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
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
EP 3533892 A1 20190904; EP 3533892 A4 20191016; EP 3533892 B1 20221102; AR 109869 A1 20190130; BR 112019007842 A2 20190716; BR 112019007842 B1 20230314; JP 6315159 B1 20180425; JP WO2018079111 A1 20181025; MX 2019004721 A 20190617; US 2019241989 A1 20190808; WO 2018079111 A1 20180503
DOCDB simple family (application)
EP 17865353 A 20170913; AR P170102946 A 20171023; BR 112019007842 A 20170913; JP 2017033008 W 20170913; JP 2017567270 A 20170913; MX 2019004721 A 20170913; US 201716343829 A 20170913