Invention Application
- Patent Title: UOE steel pipe excellent in collapse strength and method of production thereof
- Patent Title (中): UOE钢管塌陷强度优良，生产方法
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Application No.: US12462218Application Date: 2009-07-30
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Publication No.: US20090320965A1Publication Date: 2009-12-31
- Inventor: Eiji Tsuru , Hitoshi Asahi
- Applicant: Eiji Tsuru , Hitoshi Asahi
- Applicant Address: JP Tokyo
- Assignee: Nippon Steel Corporation
- Current Assignee: Nippon Steel Corporation
- Current Assignee Address: JP Tokyo
- Priority: JP2002-150870 20020524; JP2002-151008 20020524; JP2002-192531 20020701
- Main IPC: C21D9/08
- IPC: C21D9/08 ; B23K31/02
Abstract:
The present invention relates to UOE steel pipe excellent in collapse characteristics formed by the UOE production method and a method for forming this UOE steel pipe, said UOE steel pipe characterized in that a ratio between compression and tension of yield strength in the circumferential direction is at least 1.05 near the inside surface and is at least 0.9 to not more to 1.0 from the center of plate thickness to the outside surface.
Public/Granted literature
- US07967926B2 UOE steel pipe excellent in collapse strength and method of production thereof Public/Granted day:2011-06-28
Information query
