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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 12577645 B1

PDFFull Text
Date of Patent:
Mar. 17, 2026

Filed:

May. 03, 2023

Non-magnetic austenitic stainless steel material and production method therefor

Applicant:

Daido Steel Co., Ltd., Nagoya, JP;

Inventors:

Chihiro Furusho, Nagoya, JP;

Yoshihiko Koyanagi, Nagoya, JP;

Assignee:

Daido Steel Co., Ltd., Nagoya, JP;

Attorney:

McGinn I.P. Law Group, PLLC

Primary Examiner:

Jie Yang

Int. Cl.
CPC ...
C22C 38/58 (2006.01); C21D 9/08 (2006.01); 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 38/46 (2006.01); C22C 38/48 (2006.01); C22C 38/50 (2006.01); C22C 38/52 (2006.01); C22C 38/54 (2006.01);
U.S. Cl.
CPC ...
C22C 38/58 (2013.01); C21D 9/085 (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 38/46 (2013.01); C22C 38/48 (2013.01); C22C 38/50 (2013.01); C22C 38/52 (2013.01); C22C 38/54 (2013.01); C21D 2211/001 (2013.01);
Abstract

The present invention relates to a non-magnetic austenitic stainless steel material having a component composition containing, in terms of mass percent, C: <0.10%, Si: <0.3%, Mn: more than 4.5% to less than 10.0%, P: <0.05%, S: <0.0020%, Ni: 9.0% to 15.0%, Cr: 17.0% to 25.0%, Mo: 3.0% to 7.0%, and N: 0.3% to 0.6%, with the balance being Fe and unavoidable impurities; satisfying (40[N]+1.2[Cr]+0.07exp(0.3[Ni]+0.3[Cu]))×1.5[Mo]{circumflex over ( )}(−0.18)≤60, in which [M] represents a content of an element M in terms of mass %; having an austenite single phase structure; having a critical pitting temperature of 50° C. or higher; and having a 0.2% proof stress of 970 MPa or more.

Find Patent Forward Citations

Furusho, Chihiro. (2026). Non-magnetic austenitic stainless steel material and production method therefor (U.S. Patent No. 12577645). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12577645

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

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