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:
Mar. 29, 2005
Filed:
Feb. 04, 2002
Applicants:
Nobue Fujibayashi, Kurashiki, JP;
Kazuaki Kyono, Kurashiki, JP;
Inventors:
Nobue Fujibayashi, Kurashiki, JP;
Kazuaki Kyono, Kurashiki, JP;
Assignee:
JFE Steel Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B015/18 ; C22C038/02 ; C22C036/60 ;
U.S. Cl.
CPC ...
Abstract
A galvannealed steel sheet having excellent surface appearance and press formability, characterized in that a steel sheet comprises a galvannealed layer at least one surface of the steel sheet, the steel sheet comprising 0.001 to 0.005% by mass of C, 0.010 to 0.040% by mass of Si, 0.05 to 0.25% by mass of Mn, and 0.010 to 0.030% by mass of P, wherein the Si, Mn, and P satisfy the relation 0.030%≦Si+P+Mn/20≦0.070%, and its production method.