STEEL HAVING EXCELLENT OUTER SURFACE SCC RESISTANCE FOR PIPELINE

Title:

STEEL HAVING EXCELLENT OUTER SURFACE SCC RESISTANCE FOR PIPELINE

Document Type and Number:

WIPO Patent Application WO/1998/000569

Kind Code:

A1

Abstract:

Steel which has an excellent outer surface SCC resistance for pipelines without deteriorating fundamental requirements as the pipeline material. The surface smoothness of the steel is so controlled as to have a centerline average roughness Ra $m(F) 7 $g(m)m and have a maximum height Rmax $m(F) 50 $g(m)m. This surface smoothness is obtained by applying shot-blast to the surface.

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Inventors:

ASAHI HITOSHI (JP)
OKANO SHIGEO (JP)
KUSHIDA TAKAHIRO (JP)
YAMANE YASUYOSHI (JP)
FUKAI HIDEAKI (JP)

Application Number:

PCT/JP1997/002220

Publication Date:

January 08, 1998

Filing Date:

June 26, 1997

Export Citation:

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Assignee:

NIPPON STEEL CORP (JP)
KOBE STEEL LTD (JP)
NIPPON KOKAN KK (JP)
KAWASAKI STEEL CO (JP)
SUMITOMO METAL IND (JP)
ASAHI HITOSHI (JP)
OKANO SHIGEO (JP)
KUSHIDA TAKAHIRO (JP)
YAMANE YASUYOSHI (JP)
FUKAI HIDEAKI (JP)

International Classes:

C21D7/06; C22C38/00; C22C38/04; C22C38/58; (IPC1-7): C21D7/06; C22C38/00

Foreign References:

JPH0693354A	1994-04-05
JPS62217184A	1987-09-24
JPS53104531A	1978-09-11
JPH0312590A	1991-01-21
JPS55104425A	1980-08-09

Other References: