Title:
STEEL PLATE FOR WELDED STEEL PIPE, AND WELDED STEEL PIPE
Document Type and Number:
Japanese Patent JP3733905
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a steel plate for welded steel pipe and a welded steel pipe by which, in the static fracture of a high-strength welded steel pipe having a strength of ≥750 MPa circumferential tensile strength, a base material part stably becomes a fracture origin and hereby the base material part having homogeneous metallic structure and mechanical properties certainly becomes a fracture origin at the static fracture of a steel pipe for pipeline.
SOLUTION: In the steel plate for welded steel pipe, cross-direction tensile strength at both ends in a cross direction is ≥750 MPa in the central part in a cross direction and also the difference between tensile strength at both ends and that in the central part is ≥20 MPa.
Inventors:
Tomoaki Ikeda
Masahiko Hamada
Akio Yamamoto
Yamauchi Shigemichi
Masahiko Hamada
Akio Yamamoto
Yamauchi Shigemichi
Application Number:
JP2001399436A
Publication Date:
January 11, 2006
Filing Date:
December 28, 2001
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
C22C38/00; C22C38/58; (IPC1-7): C22C38/00; C22C38/58
Domestic Patent References:
| JP10216824A | ||||
| JP2001032043A |
Attorney, Agent or Firm:
Shoichi Hirose
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