PURPOSE: To improve nodular corrosion resistance and uniform corrosion resistance, by specifying and reducing Sn content in a zirconium alloy with a specific composition.

CONSTITUTION: The zirconium alloy has a composition consisting of, by weight, ≤1.0% Sn, 0.05W0.5% Fe, ≤0.3% Cr, ≤0.2% Ni, and the balance Zr. s compared with a zirconium alloy produced in the ordinary manufacturing process for corrosion-resisting zirconium alloy, e.g., zircaloy-2 and zircaloy-4, this alloy is reduced in Sn content, though respective contents of Fe, Cr, and Ni are equivalent. When Sn content is increased, nodular corrosion occurs and uniform corrosion velocity is increased, but, when it is less than 1.0%, the occurrence of nodular corrosion cannot be observed and uniform corrosion velocity is reduced.