Steel plate with excellent hydrogen induced cracking resistance, and manufacturing method of the same

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United States of America Patent

PATENT NO 9068253
APP PUB NO 20130260164A1
SERIAL NO

13833478

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Abstract

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A steel plate is provided which has excellent hydrogen induced cracking resistance. The steel plate is suitable for use in a line pipe. The steel plate satisfies a predetermined composition. In a composition of an inclusion contained in the steel and having a width of 1 μm or more, the ratio (RES/CaS) of the mass of an REM sulfide (RES) to that of a Ca sulfide (CaS) is equal to or more than 0.05, a Zr content of the inclusion is in a range of 5 to 60%, and a Nb content of the inclusion is 5% or less.

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Patent Owner(s)

  • KABUSHIKI KAISHA KOBE SEIKO SHO (KOBE STEEL, LTD.);KOBE STEEL, LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Imamura, Hiroki Kakogawa, JP 8 354
Kato, Taku Kakogawa, JP 207 2172
Sato, Shinsuke Kakogawa, JP 59 1380

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