| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for producing zirconium alloy-based reactor core structural material having sufficient corrosion resistance, particularly excellent in uniform corrosion resistance and hydrogen absorption resistance in higher burn-up degree and for longer use than before. SOLUTION: Sn: 0.8-1.6wt.%, Fe: 0.17-0.25wt.%, Cr: 0.15-0.25wt.%, Ni: 0.01-0.08wt.% and impurity Si of concentration of 120ppm or less are contained, the residual is composed of Zr, and after zirconium alloy adjusted so as to satisfy Fe+Cr+Ni<=0.52wt.% is melted and made a piece of casting,Βhardening treatment is performed. Thereafter, rolling and annealing treatment are performed so that the total thermal input amountΣA1 for the material may be in the range of 1×10<-19> -1×10<-17> .
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