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. 11, 2014
Filed:
May. 18, 2010
Yoshiyuki Watanabe, Tokyo, JP;
Kazuhiro Fukunaga, Tokyo, JP;
Akihiko Kojima, Tokyo, JP;
Ryuji Uemori, Tokyo, JP;
Rikio Chijiiwa, Kawasaki, JP;
Yoshiyuki Watanabe, Tokyo, JP;
Kazuhiro Fukunaga, Tokyo, JP;
Akihiko Kojima, Tokyo, JP;
Ryuji Uemori, Tokyo, JP;
Rikio Chijiiwa, Kawasaki, JP;
Nippon Steel & Sumitomo Metal Corporation, Tokyo, JP;
Abstract
A steel for a welded structure includes the following composition: by mass %, C at a C content [C] of 0.015 to 0.045%; Si at a Si content [Si] of 0.05 to 0.20%; Mn at a Mn content [Mn] of 1.5 to 2.0%; Ni at a Ni content [Ni] of 0.10 to 1.50%; Ti at a Ti content [Ti] of 0.005 to 0.015%; O at an O content [O] of 0.0015 to 0.0035%; and N at a N content [N] of 0.002 to 0.006%, and a balance composed of Fe and unavoidable impurities. In the steel for a welded structure, the P content [P] is limited to 0.008% or less, the S content [S] is limited to 0.005% or less, the Al content [Al] is limited to 0.004% or less, the Nb content [Nb] is limited to 0.005% or less, the Cu content [Cu] is limited to 0.24% or less, the V content [V] is limited to 0.020% or less, and a steel composition parameter Pis 0.065% or less, and a steel composition hardness parameter CeqH is 0.235% or less.