NICKEL-CONTAINING STEEL FOR LOW-TEMPERATURE USE - NIPPON STEEL & SUMITOMO METAL CORP

Title:

NICKEL-CONTAINING STEEL FOR LOW-TEMPERATURE USE

Document Type and Number:

WIPO Patent Application WO/2019/082322

Kind Code:

A1

Abstract:

This nickel-containing steel for low-temperature use has a chemical composition within a prescribed range. The metal structure in the center section of the plate thickness contains an austenite phase of 2.0–20.0 volume%, the average grain diameter of prior austenite grains is 3.0–15.0 µm, the average aspect ratio of the prior austenite grains is 1.0–2.4, the plate thickness is 4.5–30 mm, the chemical components and the average grain diameter of prior austenite grains are further restricted according to plate thickness, the yield stress at room temperature is 460–710 MPa, and the tensile strength at room temperature is 560–810 MPa.

Inventors:

NAMEGAWA TETSUYA (JP)
HOSHINO MANABU (JP)
OMIYA SHINICHI (JP)
KAGAYA TAKAYUKI (JP)

Application Number:

PCT/JP2017/038615

Publication Date:

May 02, 2019

Filing Date:

October 26, 2017

Export Citation:

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Assignee:

NIPPON STEEL & SUMITOMO METAL CORP (JP)

International Classes:

C22C38/00; C22C38/54

Foreign References:

JP2015086403A	2015-05-07
JP2017115239A	2017-06-29
JP2017008413A	2017-01-12
JP2016176141A	2016-10-06
JP2016044332A	2016-04-04
JP2017160510A	2017-09-14
JP2011021243A	2011-02-03
JPS579881B2	1982-02-24
JP2014210948A	2014-11-13
JP2011219849A	2011-11-04
JP223442A

Other References: