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. 28, 2012
Filed:
Nov. 29, 2002
Applicants:
Toshiyuki Murakami, Tokyo, JP;
Tetsuo Shiraga, Tokyo, JP;
Kiyohito Ishida, Sendai, JP;
Katsunari Oikawa, Shibata-machi, JP;
Inventors:
Toshiyuki Murakami, Tokyo, JP;
Tetsuo Shiraga, Tokyo, JP;
Kiyohito Ishida, Sendai, JP;
Katsunari Oikawa, Shibata-machi, JP;
Assignees:
JFE Bars & Shapes Corporation, Tokyo, JP;
National Institute of Advanced Industrial Science & Technology, Tokyo, JP;
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C22C 38/60 (2006.01); C22C 38/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
A low carbon free cutting steel can be obtained by allowing the steel to contain 0.02 to 0.15 mass % of C, 0.05 to 1.8 mass % of Mn, 0.20 to 0.49 mass % of S, more than 0.01 mass % and not more than 0.03 mass % of O, 0.3 to 2.3% of Cr, and the balance consisting of Fe and inevitable impurities, the Cr/S ratio falling within a range of between 2 and 6.