High-strength steel, method for manufacturing high-strength steel, steel pipe, and method for manufacturing steel pipe

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United States of America Patent

PATENT NO 10954576
APP PUB NO 20180066332A1
SERIAL NO

15560013

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Abstract

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A high-strength steel having a specified chemical composition, wherein parameter Peff is 0.050% or more, the relationship (TS0−TS)/TS0≤0.050 is satisfied, wherein TS is defined as tensile strength determined at a temperature of 350° C. after aging has been performed under the condition of a Larson-Miller Parameter (LMP) of 15700, and wherein TS0 is defined as tensile strength determined at a temperature of 350° C. before the aging is performed, and having a toughness represented by a vE−20 of 100 J or more in a weld heat-affected zone, which is formed when welding is performed.

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Patent Owner(s)

  • JFE STEEL CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Endo, Shigeru Chiba, JP 137 2473
Ishikawa, Nobuyuki Kawasaki, JP 87 541
Ota, Shusaku Tokyo, JP 11 20
Shimamura, Junji Fukuyama, JP 46 157

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