Austenitic stainless steel

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United States of America

PATENT NO 11268177
APP PUB NO 20180265954A1
SERIAL NO

15763164

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Abstract

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An austenitic stainless steel according to the present invention has a chemical composition containing, by mass %: C: 0.01 to 0.15%; Si: 2.0% or less; Mn: 3.0% or less; Cr: 10.0 to 20.0%; Ni: 5.0 to 13.0%; N: 0.01 to 0.30%; Nb: 0 to 0.5%; Ti: 0 to 0.5%; and V: 0 to 0.5%, with the balance: Fe and impurities, wherein an average grain size is 10.0 μm or less, a difference in value of an average lattice constant dAve. (={dγ(111)×Iγ(111)+dγ(200)×Iγ(200)+dγ(220)×Iγ(220)+dγ(311)×Iγ(311)}/{Iγ(111)+Iγ(200)+Iγ(220)+Iγ(311)}) of an austenite phase between a surface portion and a center portion is 0.010 Å or more, and a value of a diffraction peak integrated intensity ratio r (=100×ΣIγ/ΣIALL) at a surface is 95% or more.

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Patent Owner(s)

Patent OwnerAddress
NIPPON STEEL CORPORATION6-1 MARUNOUCHI 2-CHOME CHIYODA-KU TOKYO 1008071 ?1008071

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Adachi, Kazuhiko Tokyo, JP 37 533
Fujii, Hideki Tokyo, JP 140 728
Nishimura, Akihiro Tokyo, JP 58 433
Teraoka, Shinichi Tokyo, JP 31 111

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