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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12781324 B1

PDFFull Text
Date of Patent:
Nov. 03, 2026

Filed:

Oct. 29, 2021

Steel material suitable for use in sour environment

Applicant:

Nippon Steel Corporation, Tokyo, JP;

Inventors:

Shinji Yoshida, Tokyo, JP;

Yuji Arai, Tokyo, JP;

Hiroyuki Fuji, Tokyo, JP;

Assignee:

NIPPON STEEL CORPORATION, Tokyo, JP;

Attorney:

Greer, Burns & Crain, Ltd.

Primary Examiner:

Jophy S Koshy

Int. Cl.
CPC ...
C21D 9/08 (2006.01); C21D 1/26 (2006.01); C21D 6/00 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/22 (2006.01); C22C 38/24 (2006.01); C22C 38/28 (2006.01); C22C 38/32 (2006.01); C22C 38/34 (2006.01); C21D 1/25 (2006.01); C21D 8/10 (2006.01); C21D 9/46 (2006.01); C22C 38/20 (2006.01); C22C 38/26 (2006.01); C22C 38/30 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/50 (2006.01); C22C 38/54 (2006.01);
U.S. Cl.
CPC ...
C22C 38/34 (2013.01); C21D 1/26 (2013.01); C21D 6/002 (2013.01); C21D 9/08 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/22 (2013.01); C22C 38/24 (2013.01); C22C 38/28 (2013.01); C22C 38/32 (2013.01); C21D 1/25 (2013.01); C21D 6/008 (2013.01); C21D 8/10 (2013.01); C21D 9/085 (2013.01); C21D 9/46 (2013.01); C21D 2211/002 (2013.01); C21D 2211/008 (2013.01); C22C 38/02 (2013.01); C22C 38/20 (2013.01); C22C 38/26 (2013.01); C22C 38/30 (2013.01); C22C 38/44 (2013.01); C22C 38/46 (2013.01); C22C 38/50 (2013.01); C22C 38/54 (2013.01);
Abstract

The steel material according to the present disclosure contains, in mass %, C: 0.20 to 0.45%, Si: 1.36 to 3.20%, Mn: 0.02 to 1.00%, P: 0.025% or less, S: 0.0100% or less, Al: 0.005 to 0.100%, Cr: 0.20 to 1.50%, Mo: 0.36 to 1.50%, V: 0.01 to 0.90%, Ti: 0.002 to 0.050%, B: 0.0001 to 0.0050%, N: 0.0100% or less, and O: 0.0100% or less, and satisfies Formula (1). A yield strength σis 758 MPa or more. The yield strength σand a dislocation density ρ satisfy Formula (2).27×Mn+9×Cr−14×Mo−770×C+760×C−11×Si+4×Si>85   (1)691<σ−110×√ρ×10≤795   (2)

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Quick Actions:

Yoshida, Shinji. (2026). Steel material suitable for use in sour environment (U.S. Patent No. 12781324). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12781324

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