Ferritic-austenitic stainless steel

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United States of America Patent

PATENT NO 9822434
SERIAL NO

13140422

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Abstract

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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.

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Patent Owner(s)

  • OUTOKUMPU OYJ

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Andersson, Jan-Olof Krylbo, SE 4 7
Johansson, Pelle Avesta, SE 4 8
Liljas, Mats Avesta, SE 11 32
Lille, Simon Avesta, SE 1 7
Samuelsson, Peter Västerås, SE 3 13
Schedin, Erik Uppsala, SE 3 8

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