Clothing ornament made from a high-Mn austenitic stainless steel

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United States of America Patent

PATENT NO 8703047
APP PUB NO 20110286879A1
SERIAL NO

13146105

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Abstract

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As a stainless steel for a metal part for clothing ornament capable of working into a complicated form part and having such nonmagnetic properties that the worked part can cope with the detection through needle detecting device is provided a high-Mn austenitic stainless steel 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 0.03 mass %, Ni: 4.0-12.0 mass %, Cr: 14.0-25.0 mass % and N: 0.07-0.17 mass %, provided that these components are contained so that δ cal (mass %) represented by the following equation (1) is not more than 5.5 mass %:

description='In-line Formulae' end='lead'δ cal (mass %)=(Cr+0.48Si+1.21Mo+2.2(V+Ti)+0.15Nb)−(Ni+0.47Cu+0.11Mn−0.0101Mn2+26.4C+20.1N)−4.7  (1)description='In-line Formulae' end='tail'

and having a magnetic permeability of not more than 1.003 under a magnetic field of 200 kA/m.

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Patent Owner(s)

Patent OwnerAddress
NIPPON YAKIN KOGYO CO LTD1-5-8 KYOBASHI CHUO-KU TOKYO 1048365 ?1048365

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hirata, Shigeru Kanagawa, JP 33 196
Ikegami, Yuji Kanagawa, JP 17 77
Yamakawa, Kazuhiro Kanagawa, JP 22 108

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