| 摘要 |
PROBLEM TO BE SOLVED: To produce a Cr-containing highly corrosion resistant low thermal expansion alloy having a sufficiently low linear expansion coefficient, excellent in cost effectiveness and suitable as the material for structural purpose. SOLUTION: This highly corrosion resistant low thermal expansion alloy has a composition containing <=0.5% C, <=0.6% Si, <=1.5% Mn, <=0.02% P, <=0.01% S, 2 to 25% Cr, 10 to 50% Ni and 0.04% N, and the balance substantially Fe and satisfies the inequality of -10<=(Cr+8Fe+10Ni-870)/(2+3.3C+7.2 N)<=5 and the inequality of (2.7Cr+2.2Ni-70)/(2+3.3C+7.2N)<=13.
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