Invention Application
- Patent Title: LOW-YIELD RATIO HIGH-STRENGTH ELECTRIC RESISTANCE WELDED STEEL PIPE, STEEL STRIP FOR ELECTRIC RESISTANCE WELDED STEEL PIPES, AND METHODS OF MANUFACTURING THEM
- Patent Title (中): 低电阻率高强度电阻焊钢管，电阻焊钢管钢带及其制造方法
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Application No.: US14390514Application Date: 2012-04-09
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Publication No.: US20150068638A1Publication Date: 2015-03-12
- Inventor: Yasuhiro Matsuki , Tomohiro Inoue
- Applicant: Yasuhiro Matsuki , Tomohiro Inoue
- Applicant Address: JP Tokyo
- Assignee: JFE STEEL CORPORATION
- Current Assignee: JFE STEEL CORPORATION
- Current Assignee Address: JP Tokyo
- International Application: PCT/JP2012/060194 WO 20120409
- Main IPC: C22C38/06
- IPC: C22C38/06 ; B23K11/16 ; F16L9/02 ; C22C38/04 ; C22C38/02 ; C22C38/00 ; B23K11/087 ; C22C38/16
Abstract:
A low-yield ratio high-strength electric resistance welded steel pipe has a yield ratio of 80% or less and a TS of 655 MPa or more. A steel material has a composition containing 0.38% to 0.45% C, 0.1% to 0.3% Si, 1.0% to 1.8% Mn, 0.03% or less P, 0.03% or less S, 0.01% to 0.07% sol. Al, and 0.01% or less N on a mass basis.
Public/Granted literature
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