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:
Dec. 29, 2020
Filed:
Jun. 13, 2017
Applicant:
Jfe Steel Corporation, Tokyo, JP;
Inventors:
Chikara Kami, Chiba, JP;
Yuta Tamura, Fukuyama, JP;
Takato Tamai, Kurashiki, JP;
Shuji Kawamura, Kawasaki, JP;
Assignee:
JFE Steel Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D 8/02 (2006.01); C21D 9/46 (2006.01); C21D 6/00 (2006.01); C22C 38/12 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/14 (2006.01); C22C 38/06 (2006.01); C22C 38/04 (2006.01); E04C 3/32 (2006.01);
U.S. Cl.
CPC ...
C21D 8/0263 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/0226 (2013.01); C21D 9/46 (2013.01); C22C 38/00 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/12 (2013.01); C22C 38/14 (2013.01); E04C 3/32 (2013.01); C21D 2211/005 (2013.01); C21D 2211/009 (2013.01);
Abstract
A method of manufacturing a hot rolled steel sheet for a square column for building structural members includes a hot rolling step, a cooling step, and a coiling step performed on a steel to form a hot rolled steel sheet, wherein the steel has a composition containing, in terms of % by mass, C: 0.07 to 0.18%, Mn: 0.3 to 1.5%, P: 0.03% or less, S: 0.015% or less, Al: 0.01 to 0.06%, N: 0.0006% or less, and the balance being Fe and unavoidable impurities.