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Title:
FLUID PART
Document Type and Number:
Japanese Patent JP2004043844
Kind Code:
A
Abstract:

To provide a fluid part whose crevice corrosion resistance can be improved while maintaining its other performance.

A prescribed metallic member composing a fluid part such as piping, and a valve and a joint used in a fluid control system consists of an alloy comprising, by weight, 0.001 to 0.01% C, ≤5% Si, ≤2% Mn, ≤0.03% P, ≤100 ppm S, ≤50 ppm O, 18 to 25% Cr, 15 to 25% Ni, 4.5 to 7.0% Mo, 0.5 to 3.0% Cu and 0.1 to 0.3% N, and the balance substantially Fe with the other inevitable impurities. CRI (crevice corrosion resisting index) obtained by CRI=[Cr]+4×[Mo]+30×[N] expressed by weight% is set to the range of 40≤CRI≤55 for securing crevice corrosion resistance based on the composite addition of each component in the alloy.


Inventors:
MATSUHASHI AKIRA
SUETSUGU KAZUHIRO
MIYAGAWA HIDEYUKI
KITA TOSHIO
SOGABE KYOTA
YOSHIKAWA KAZUHIRO
MORIMOTO AKIHIRO
SATO JUNJI
OMICHI KUNIHIKO
AKAMOTO HISATOSHI
KIMURA YOSHIKI
Application Number:
JP2002199901A
Publication Date:
February 12, 2004
Filing Date:
July 09, 2002
Export Citation:
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Assignee:
NIPPON STEEL CORP
FUJIKIN KK
International Classes:
C22C38/00; C22C38/42; C22C38/44; C22C38/46; C22C38/58; F16K7/12; F16K25/00; F16K27/00; F16K27/02; F16K31/122; F16L19/08; (IPC1-7): C22C38/00; C22C38/58; F16K7/12; F16K27/00; F16L19/08
Attorney, Agent or Firm:
Einosuke Kishimoto
Akira Watanabe
Norihiko Hibi
Kiyosue Yasuko