Invention Grant
- Patent Title: Ferritic stainless steel pipe having excellent salt tolerance in gap, pipe-end-thickened structure, welding joint, and welded structure
-
Application No.: US16492527Application Date: 2018-03-27
-
Publication No.: US11215299B2Publication Date: 2022-01-04
- Inventor: Masatoshi Abe , Junichi Hamada , Nobuhiko Hiraide
- Applicant: NIPPON STEEL Stainless Steel Corporation
- Applicant Address: JP Tokyo
- Assignee: NIPPON STEEL Stainless Steel Corporation
- Current Assignee: NIPPON STEEL Stainless Steel Corporation
- Current Assignee Address: JP Tokyo
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: JPJP2017-069284 20170330
- International Application: PCT/JP2018/012598 WO 20180327
- International Announcement: WO2018/181401 WO 20181004
- Main IPC: C22C38/00
- IPC: C22C38/00 ; C22C38/02 ; C22C38/04 ; C22C38/06 ; C22C38/50 ; F16L13/02 ; C21D8/02 ; C21D9/08 ; C21D9/46 ; C22C38/42 ; C22C38/44 ; C22C38/46 ; C22C38/48 ; C22C38/52 ; C22C38/54 ; C22C38/60
Abstract:
This ferritic stainless steel pipe contains, by mass %: C: 0.001% to 0.100%; Si: 0.01% to 2.00%; Mn: 0.01% to 2.00%; P: 0.001% to 0.05%; S: 0.0001% to 0.005%; Cr: 10.5% to 20.0%; Sn: 0.001% to 0.600%; Ti: 0.001% to 1.000%; Al: 0.001% to 0.100%; and N: 0.001% to 0.02%, with a balance being Fe and unavoidable impurities, the ferritic stainless steel pipe includes a pipe-end-thickened portion at a pipe end portion, and a gap distance d (μm) formed at the pipe end portion satisfies a relationship of d≥Cr2/(1000Sn) (in the expression, Cr and Sn represent amounts (mass %) of respective elements).
Public/Granted literature
Information query
