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:
Feb. 12, 1980
Filed:
Nov. 30, 1978
Applicant:
Inventors:
Kunio Watanabe, Sakai, JP;
Yoshio Hashimoto, Sakai, JP;
Assignee:
Nippon Steel Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C21D / ; C21D / ;
U.S. Cl.
CPC ...
148 / ; 148 / ; 148 123 ;
Abstract
A method for producing a plain low carbon hot rolled steel strip or sheet having a low yield ratio, not higher than 70%, high ductility and high tensile strength comprising: hot rolling a steel slab with its finishing temperature not lower than the Ar.sub.3 transformation temperature, cooling the hot rolled strip from a temperature not lower than Ar.sub.3 transformation temperature and coiling the hot rolled strip at a temperature not higher than 300.degree. C.