| 摘要 |
PURPOSE:To improve the resistance of an Ni alloy to stress corrosion cracking by specifying the amounts of Cr, Fe and Nb as essential components in the alloy. CONSTITUTION:This Ni alloy contains 14-17wt% Cr, 6-10wt% Fe and 3.5-5wt% Nb as essential components or further contains a proper amount of a deoxidizing agent such as C, Mn, Si or Ti. Since the Ni alloy contains the relatively large amount of Nb, it has higher resistance to intergranular corrosion and stress corrosion cracking than 'Inconel(R)' alloy or the like and also has improved mechanical characteristics such as offset yield stress strength at 0.2% permanent set, tensile strength and elongation. The Ni alloy can be used as a structural material for a light-water reactor.
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