PURPOSE: To achieve corrosion resistance in a high temperature steam by providing an intermediate zirconium alloy layer of a specified thickness containing specified wt.% of Sn, Fe, Cr, at a specified ratio of Fe/Cr and the remainder of Zr.

CONSTITUTION: The zirconium alloy has a composition of 0.2-1.7wt.% of Sn, 0.50-0.24wt.% of Fe, and 0.03-0.30wt.% of Cr, with the ratio of Fe/Cr being set in the range of 0.5-1.5, and the remainder of Zr unevitable impurities. The alloy is fused by nonconsumable argon arc fusion method to produce a small ingot which is then subjected to high temperature vacuum solution heat treatment. A pipe is then subjected to cladding-(vacuum) heat treatment-cold rolling-(vacuum) heat treatment under predetermined conditions thus producing a pipe 1 applied with coating of 0.05mm or above. Cladding is applied to the inner and outer faces of a zircaloy pipe 2.