| 摘要 |
PROBLEM TO BE SOLVED: To provide heat resisting steel for fast breeder which has excellent high-temperature strength and further various excellent characteristics against high-temperature Na. SOLUTION: The heat resisting steel for fast breeder contains, by weight, 0.05-0.20% C, <=0.5% Si, 0.05-1.5% Mn, 0.5-3.0% Ni, 10.5-13.0% Cr, 0.05-3.0% Mo, 0.05-0.30% V, 0.01-0.20%, in total, of either or both of Nb and Ta, and 0.01-0.1% N and further contains 2.0-3.5% W and 2.0-10.0% Co, or 2-4% Co and 0.01-0.20% B, or 2.0-3.5% W and 2-4% Co and 0.01-0.02% B.
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