Thick-walled high-strength seamless steel pipe with excellent sour resistance for pipe for pipeline, and process for producing same

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United States of America Patent

PATENT NO 9932651
SERIAL NO

14129810

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Abstract

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A heavy wall and high strength seamless steel pipe having high sour resistance is provided. In particular, a quenching and tempering treatment is conducted to adjust the yield strength to be higher than 450 MPa and adjust the Vickers hardness HV5 that can be measured at an outermost side or an innermost side of the pipe under a 5 kgf load (test load: 49 N) to be 250 HV5 or less.

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Patent Owner(s)

Patent OwnerAddress
JFE STEEL CORPORATION2-3 UCHISAIWAI-CHO 2-CHOME CHIYODA-KU TOKYO 1000011

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Eguchi, Kenichiro Aichi, JP 39 198
Ishiguro, Yasuhide Aichi, JP 42 266
Katagiri, Tadao Tokyo, JP 1 18
Kimura, Mitsuo Chiba, JP 62 797
Tanaka, Masahito Beijing, CN 38 802
Yokogawa, Hiroshi Aichi, JP 19 513

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