| 摘要 |
PROBLEM TO BE SOLVED: To provide a corrosion resistant alloy with little thermal expansion, which has a mean coefficient of heat expansion between 30°C and 200°C controlled low in order to have the coefficient of heat expansion matched to other members in a range between an approximately atmospheric temperature and a warm temperature, and has superior corrosion resistance as well. SOLUTION: The corrosion resistant alloy with little thermal expansion comprises, by mass%, 0.15% or less C, 8.5% or more but less than 10.0% Cr, exceeding 56.0% but less than 58.0% Co, and the balance substantially Fe. The corrosion resistant alloy preferably comprises, by mass%, 0.01-0.15% C, 9.0% or more but less than 9.5% Cr, exceeding 56.5% but 57.0% or less Co and the balance substantially Fe, and has a mean coefficient of heat expansion of 4.0×10<SP>-6</SP>/°C to 7.0×10<SP>-6</SP>/°C between 30°C and 200°C. The alloy also preferably includes, by mass%, 0.005% or more but less than 0.5% S. COPYRIGHT: (C)2004,JPO&NCIPI
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