Fe-Cr-Ni ALLOY MATERIAL - NIPPON STEEL CORP

Title:

Fe-Cr-Ni ALLOY MATERIAL

Document Type and Number:

WIPO Patent Application WO/2023/132339

Kind Code:

A1

Abstract:

Provided is an Fe-Cr-Ni alloy material having high strength and decreased strength anisotropy. This Fe-Cr-Ni alloy material comprises, in % by mass, C: 0.030% or less, Si: 0.01-1.00%, Mn: 0.01-2.00%, P: 0.030% or less, S: 0.0050% or less, Ni: 29.0-36.5%, Cr: 23.0-27.5%, Mo: 2.00-6.00%, Al: 0.01-0.30%, rare-earth element: 0.016-0.100%, N: 0.220-0.500% and O: 0.010% or less with the balance being Fe and impurities, satisfies formula (1) and has a microstructure with a standard deviation of an austenitic grain size number of 0.80 or less and a tensile yield strength of 758 MPa or more.　(1): 3×Ni-2×Cr-150×N<15.0, wherein the atomic symbols in formula (1) are assigned the contents (% by mass) of the corresponding elements.

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Inventors:

TAKABE HIDEKI (JP)
NAKANE KAZUYA (JP)
MATSUDA KOHEI (JP)
OKADA SEIYA (JP)

Application Number:

PCT/JP2023/000052

Publication Date:

July 13, 2023

Filing Date:

January 05, 2023

Export Citation:

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Assignee:

NIPPON STEEL CORP (JP)

International Classes:

C22C38/00; C21D8/10; C22C30/00; C22C30/02; C22C38/58

Domestic Patent References:

WO2018225869A1	2018-12-13
WO2012128258A1	2012-09-27
WO2010113843A1	2010-10-07
WO2021256128A1	2021-12-23

Foreign References:

JP2018031028A

2018-03-01

Attorney, Agent or Firm:

ASCEND IP LAW FIRM (JP)

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