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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 12624433 B1

PDFFull Text
Date of Patent:
May. 12, 2026

Filed:

Mar. 04, 2021

Ferritic stainless steel and method for manufacturing same

Applicant:

Nippon Steel Stainless Steel Corporation, Tokyo, JP;

Inventors:

Yoshitomo Fujimura, Tokyo, JP;

Takahito Hamada, Tokyo, JP;

Taichiro Mizoguchi, Tokyo, JP;

Assignee:

NIPPON STEEL STAINLESS STEEL CORPORATION, Tokyo, JP;

Attorneys:

McCarter & English, LLP

Dave S. Christensen

Primary Examiner:

Jie Yang

Int. Cl.
CPC ...
C22C 38/50 (2006.01); C21D 8/0221 (2026.01); C21D 8/0247 (2026.01); C21D 8/0278 (2026.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/06 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/48 (2006.01); C23G 1/08 (2006.01);
U.S. Cl.
CPC ...
C22C 38/50 (2013.01); C21D 8/0226 (2013.01); C21D 8/0236 (2013.01); C21D 8/0273 (2013.01); C21D 8/0278 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/02 (2013.01); C22C 38/04 (2013.01); C22C 38/06 (2013.01); C22C 38/42 (2013.01); C22C 38/44 (2013.01); C22C 38/48 (2013.01); C23G 1/085 (2013.01); C21D 2211/005 (2013.01);
Abstract

Realized is ferritic stainless steel which has excellent high-temperature strength and excellent red scale resistance. The ferritic stainless steel contains not more than 0.025% by mass of C, 0.05% by mass to 3.0% by mass of Si, 0.05% by mass to 2.0% by mass of Mn, not more than 0.04% by mass of P, not more than 0.03% by mass of S, not more than 0.5% by mass of Ni, 10.5% by mass to 25.0% by mass of Cr, not more than 0.025% by mass of N, 0.05% by mass to 1.0% by mass of Nb, not more than 3.0% by mass of Mo, not more than 1.8% by mass of Cu, not more than 0.2% by mass of Al, and not more than 0.5% by mass of Ti. The sum of the concentrations of Cr and Si, each of which is present as oxide or hydroxide, at a surface of the ferritic stainless steel and at depths to 6 nm from the surface is a given value or more.

Find Patent Forward Citations

Fujimura, Yoshitomo. (2026). Ferritic stainless steel and method for manufacturing same (U.S. Patent No. 12624433). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12624433

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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