The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 11, 2018
Filed:
Mar. 24, 2014
Applicant:
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Inventors:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22C 38/46 (2006.01); C22C 38/48 (2006.01); C21D 8/02 (2006.01); B21B 1/02 (2006.01); C22C 38/26 (2006.01); C22C 38/24 (2006.01); C22C 38/16 (2006.01); C22C 38/08 (2006.01); C22C 38/06 (2006.01); C22C 38/04 (2006.01); C22C 38/02 (2006.01); B21B 45/00 (2006.01); B21B 45/02 (2006.01); C21D 8/00 (2006.01); C22C 38/00 (2006.01); C22C 38/12 (2006.01);
U.S. Cl.
CPC ...
B21B 1/026 (2013.01); B21B 45/004 (2013.01); B21B 45/0203 (2013.01); C21D 8/00 (2013.01); C21D 8/0226 (2013.01); C22C 38/00 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/08 (2013.01); C22C 38/12 (2013.01); C22C 38/16 (2013.01); C22C 38/24 (2013.01); C22C 38/26 (2013.01); C22C 38/48 (2013.01); C21D 2211/004 (2013.01); C21D 2211/005 (2013.01); C21D 2211/009 (2013.01);
Abstract
In a steel sheet pile according to the present invention, a carbon equivalent CEis 0.260 to 0.500, a structure includes a ferrite, a pearlite, a Widmanstätten ferrite, and a precipitate, the precipitate is one or both of Nb carbonitride and V carbonitride, a total number density of the precipitate is 0.10 to 0.30 pieces/μm, a total area ratio of the ferrite and the pearlite is 70% or more, an area ratio of the Widmanstätten ferrite is 1% or more, an average grain size of the ferrite and the pearlite is 10 to 80 μm, and a yield strength is 460 MPa or more.