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.:
Date of Patent:
Nov. 21, 2017
Filed:
Dec. 17, 2009
Peter Samuelsson, Västerås, SE;
Simon Lille, Avesta, SE;
Jan-olof Andersson, Krylbo, SE;
Mats Liljas, Avesta, SE;
Erik Schedin, Uppsala, SE;
Pelle Johansson, Avesta, SE;
Peter Samuelsson, Västerås, SE;
Simon Lille, Avesta, SE;
Jan-Olof Andersson, Krylbo, SE;
Mats Liljas, Avesta, SE;
Erik Schedin, Uppsala, SE;
Pelle Johansson, Avesta, SE;
Outokumpu Oyj, Helsinki, FI;
Abstract
The invention relates to a duplex stainless steel having austenitic-ferritic microstructure of 35-65% by volume, preferably 40-60% by volume of ferrite and having good weldability, good corrosion resistance and good hot workability. The steel contains 0.005-0.04% by weight carbon, 0.2-0.7% by weight silicon, 2.5-5% by weight manganese, 23-27% by weight chromium, 2.5-5% by weight nickel, 0.5-2.5% by weight molybdenum, 0.2-0.35% by weight nitrogen, 0.1-1.0% by weight copper, optionally less than 1% by weight tungsten, less than 0.0030% by weight one or more elements of the group containing boron and calcium, less than 0.1% by weight cerium, less than 0.04% by weight aluminium, less than 0.010% by weight sulphur and the rest iron with incidental impurities.