Title:
HIGH TENSILE STRENGTH THICK STEEL PLATE HAVING EXCELLENT WELDABILITY AND UNIFORM ELONGATION
Document Type and Number:
Japanese Patent JP3854807
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To produce a 590 MPa class thick steel plate which has excellent weldability (high heat input HAZ toughness and weld cracking resistance) and uniform elongation.
SOLUTION: The high tensile strength thick steel plate consists of steel containing, by mass, 0.010 to 0.06% C, 0.005 to 0.03% Ti and 0.0020 to 0.010% N. By volume, ≥90% of the steel structure on observation with an optical microscope consist of bainite, and the content of retained γ measured by an X-ray diffraction method is at least 1.0 vol.%. The steel plate also has a tensile strength of 590 to <780 MPa.
Inventors:
Hatano etc.
Yoshiomi Okazaki
Yoshiomi Okazaki
Application Number:
JP2001065518A
Publication Date:
December 06, 2006
Filing Date:
March 08, 2001
Export Citation:
Assignee:
KABUSHIKI KAISHA KOBE SEIKO SHO
International Classes:
C22C38/00; C22C38/14; C22C38/58; (IPC1-7): C22C38/00; C22C38/14; C22C38/58
Domestic Patent References:
| JP7018383A | ||||
| JP55100924A |
Attorney, Agent or Firm:
Kyuichi Ueki
Etsushi Kotani
Etsushi Kotani
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