Title:
AUSTENITIC STAINLESS STEEL FOR CURRENT-CARRYING ELECTRIC PARTS, AND FUEL CELL
Document Type and Number:
Japanese Patent JP3397169
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To produce an austenitic stainless steel for current-carrying electric parts, minimal in contact electric resistance, and to provide a separator composed of the stainless steel, and a solid-electrolyte-type fuel cell having the separator.
SOLUTION: The austenitic stainless steel has a composition containing, by weight, 0.015-0.2% C. 0.01-1.5% Si. 0.01-2.5% Mn, 17-30% Cr, 7-50% Ni, 0-3% Cu, 0-0.3% N, 0-7% Mo, and 0-0.2% Al and satisfying Cr+3Mo=17 to 50%, and further, the content of C precipitating as a Cr carbide and the total content of C in the steel satisfy inequality (content (wt.%) of C precipitating as Cr carbide)×100/(total C content (wt.%) in the steel-0.012%)≥85. A fuel cell 1 is provided with a separator 5 composed of the stainless steel.
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Inventors:
Yoshio Tarutani
Akira Seki
Norifumi Doi
Akira Seki
Norifumi Doi
Application Number:
JP11546199A
Publication Date:
April 14, 2003
Filing Date:
April 22, 1999
Export Citation:
Assignee:
SUMITOMO METAL INDUSTRIES,LTD.
International Classes:
H01M8/02; C22C38/00; C22C38/44; C22C38/58; H01M8/10; (IPC1-7): H01M8/02; C22C38/00; C22C38/44; C22C38/58; H01M8/10
Domestic Patent References:
| JP2000239806A |
Attorney, Agent or Firm:
Terutaka Hogami (1 person outside)