Nickel-containing steel for low temperature

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United States of America Patent

PATENT NO 11578394
APP PUB NO 20220282362A1
SERIAL NO

17751338

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Abstract

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A nickel-containing steel for low temperature according to an aspect of the present invention has a chemical composition within a predetermined range, in which a metallographic structure of a thickness middle portion contains 2.0 vol % to 20.0 vol % of an austenite phase, an average grain size of prior austenite grains is 3.0 μm to 15.0 μm, an average aspect ratio of the prior austenite grains is 1.0 to 2.4, a plate thickness is 4.5 mm to 30 mm, the chemical composition and the average grain size of the prior austenite grains are further limited depending on the plate thickness, a yield stress at room temperature is 460 MPa to 710 MPa, and a tensile strength at the room temperature is 560 MPa to 810 MPa.

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Patent Owner(s)

  • 501 NIPPON STEEL CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hoshino, Manabu Tokyo, JP 43 79
Kagaya, Takayuki Tokyo, JP 13 3
Namegawa, Tetsuya Tokyo, JP 7 0
Omiya, Shinichi Tokyo, JP 6 0

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