Invention Grant
- Patent Title: High strength stainless steel seamless pipe with excellent corrosion resistance for oil well and method of manufacturing the same
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Application No.: US14408772Application Date: 2013-06-19
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Publication No.: US09758850B2Publication Date: 2017-09-12
- Inventor: Kenichiro Eguchi , Yasuhide Ishiguro , Yukio Miyata , Mitsuo Kimura
- Applicant: JFE Steel Corporation
- Applicant Address: JP
- Assignee: JFE Steel Corporation
- Current Assignee: JFE Steel Corporation
- Current Assignee Address: JP
- Agency: DLA Piper LLP (US)
- Priority: JP2012-139766 20120621; JP2012-277718 20121220
- International Application: PCT/JP2013/003807 WO 20130619
- International Announcement: WO2013/190834 WO 20131227
- Main IPC: C22C38/54
- IPC: C22C38/54 ; C21D9/08 ; C22C38/00 ; C22C38/46 ; C21D6/00 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/42 ; C22C38/44 ; C22C38/48 ; C22C38/50
Abstract:
A pipe having chemical composition contains, by mass %, C: 0.05% or less, Si: 0.5% or less, Mn: 0.15% or more and 1.0% or less, Cr: 13.5% or more and 15.4% or less, Ni: 3.5% or more and 6.0% or less, Mo: 1.5% or more and 5.0% or less, Cu: 3.5% or less, W: 2.5% or less, and N: 0.15% or less so that the relationship −5.9×(7.82+27C−0.91 Si+0.21Mn−0.9Cr+Ni−1.1Mo−0.55W+0.2Cu+11N)≧13.0 is satisfied.
Public/Granted literature
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