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:
Aug. 12, 2014
Filed:
Nov. 07, 2008
Nobuyuki Ishikawa, Kawasaki, JP;
Makoto Suzuki, Kawasaki, JP;
Tomohiro Matsushima, Fukuyama, JP;
Akiyoshi Tsuji, Kawasaki, JP;
Shinichi Kakihara, Fukuyama, JP;
Nobuo Shikanai, Tokyo, JP;
Yutaka Awajiya, Chiba, JP;
Nobuyuki Ishikawa, Kawasaki, JP;
Makoto Suzuki, Kawasaki, JP;
Tomohiro Matsushima, Fukuyama, JP;
Akiyoshi Tsuji, Kawasaki, JP;
Shinichi Kakihara, Fukuyama, JP;
Nobuo Shikanai, Tokyo, JP;
Yutaka Awajiya, Chiba, JP;
JFE Steel Corporation, , JP;
Abstract
A steel plate for line pipes containing, in terms of % by weight, C: 0.02 to 0.06%, Si: 0.5% or less, Mn: 0.8 to 1.6%, P: 0.008% or less, S: 0.0008% or less, Al: 0.08% or less, Nb: 0.005 to 0.035%, Ti: 0.005 to 0.025%, and Ca: 0.0005 to 0.0035%, and optionally contains one or more of Cu: 0.5% or less, Ni: 1% or less, Cr: 0.5% or less, Mo: 0.5% or less and V: 0.1% or less, and has a CP value of 0.95 or less represented by CP=4.46C(%)+2.37Mn(%)/6+{1.18Cr(%)+1.95Mo(%)+1.74V(%)}/5+{1.74Cu(%)+1.7Ni(%)}/15+22.36P(%), and a Ceq value of 0.30 or more represented by Ceq=C(%)+Mn(%)/6+{Cr(%)+Mo(%)+V(%)}/5 +{Cu(%)+Ni(%)}/15.