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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 9528173 B1

PDFFull Text
Date of Patent:
Dec. 27, 2016

Filed:

Feb. 21, 2014

High-mn austenitic stainless steel and a producing method of high-mn austenitic stainless steel sheet

Applicant:

Nippon Yakin Kogyo Co., Ltd., Tokyo, JP;

Inventors:

Shigeru Hirata, Kawasaki, JP;

Yuji Ikegami, Kawasaki, JP;

Kazuhiro Yamakawa, Kawasaki, JP;

Assignee:

NIPPON YAKIN KOGYO CO., LTD., Tokyo, JP;

Attorney:

Greenblum & Bernstein, P.L.C.

Primary Examiner:

Deborah Yee

Int. Cl.
CPC ...
C22C 38/58 (2006.01); C22C 38/50 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/46 (2006.01); C22C 38/00 (2006.01); C22C 38/02 (2006.01); C21D 8/00 (2006.01); C21D 9/00 (2006.01); C22C 38/48 (2006.01); C22C 38/54 (2006.01);
U.S. Cl.
CPC ...
C22C 38/58 (2013.01); C21D 8/005 (2013.01); C21D 9/0068 (2013.01); C22C 38/001 (2013.01); C22C 38/002 (2013.01); C22C 38/005 (2013.01); C22C 38/02 (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 38/54 (2013.01);
Abstract

High-Mn austenitic stainless steels having a chemical composition comprising C: 0.02-0.12 mass %, Si: 0.05-1.5 mass %, Mn: 10.0-22.0 mass %, S: not more than 0.0028 mass %, Ni: 4.0-12.0 mass %, Cr: 14.0-25.0 mass % and N: 0.07-0.17 mass % with the balance being Fe and inevitable impurities, provided that these components are contained so that δ cal represented by the following equation is not more than 5.5%: δ cal (mass %)=(Cr+0.48Si)−(Ni+0.11Mn−0.0101Mn+26.4C+20.1N)−4.7, wherein each element symbol in the equation is a content of the respective element (mass %), and having a magnetic permeability of not more than 1.003 under a magnetic field of 200 kA/m.

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