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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 10131964 B1

PDFFull Text
Date of Patent:
Nov. 20, 2018

Filed:

Mar. 30, 2015

Iron-carbon-manganese austenitic steel sheet

Applicants:

Arcelormittal France, Saint Denis, FR;

Thyssenkrupp Steel Europe Ag, Duisburg, DE;

Inventors:

Colin Scott, Montigny les Metz, FR;

Philippe Cugy, Thionville, FR;

Christian Allely, Metz, FR;

Assignees:

ARCELORMITTAL FRANCE, Saint Denis, FR;

THYSSENKRUPP STEEL EUROPE AG, Duisburg, DE;

Attorney:

Davidson, Davidson & Kappel, LLC

Primary Examiner:

Edward M Johnson

Int. Cl.
CPC ...
C22C 38/02 (2006.01); C21D 9/46 (2006.01); C22C 38/04 (2006.01); C22C 38/08 (2006.01); C22C 38/12 (2006.01); C22C 38/16 (2006.01); C23C 2/02 (2006.01); C23C 2/06 (2006.01); C23C 2/28 (2006.01); C23C 28/02 (2006.01); C21D 1/26 (2006.01); C21D 1/42 (2006.01); C21D 1/767 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C22C 38/00 (2006.01); C22C 38/06 (2006.01); B32B 15/01 (2006.01);
U.S. Cl.
CPC ...
C21D 9/46 (2013.01); B32B 15/013 (2013.01); C21D 1/26 (2013.01); C21D 1/42 (2013.01); C21D 1/767 (2013.01); C21D 6/001 (2013.01); C21D 6/004 (2013.01); C21D 6/005 (2013.01); C21D 6/008 (2013.01); C21D 8/0205 (2013.01); C21D 8/0236 (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 38/08 (2013.01); C22C 38/12 (2013.01); C22C 38/16 (2013.01); C23C 2/02 (2013.01); C23C 2/06 (2013.01); C23C 2/28 (2013.01); C23C 28/021 (2013.01); C23C 28/023 (2013.01); C23C 28/025 (2013.01); C23C 28/028 (2013.01); Y02P 10/253 (2015.11); Y10T 428/12799 (2015.01);
Abstract

An austenitic steel sheet excellent in resistance to delayed cracking is provided. The composition of said steel comprises in weight: The composition may optionally include B, Ni and/or Cu. The remainder of the composition includes iron and unavoidable impurities inherent to fabrication, including hydrogen. The quantity Xp of the at least one metallic element under the form of carbides, nitrides or carbonitrides is, in weight: The hydrogen content Hmax designating the maximal hydrogen content that can be measured from a series of at least five specimens, and the quantity Xp, in weight, is such that:

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