Hitachi, Ltd.

Nozomu Adachi

Masahisa Inagaki

Naoya Okizaki

Hideo Soneda

Ryo Ishibashi

Yoshikazu Todaka

Minoru Umemoto

Tomomi Nakamura

Hiroaki Azuma

Disclosed is a zirconium alloy material having high corrosion resistance regardless of thermal history during its manufacturing process. The zirconium alloy material is obtained by providing a zirconium alloy containing on the mass basis: 0.001% to 1.9% of Sn, 0.01% to 0.3% of Fe, 0.01% to 0.3% of Cr, 0.001% to 0.3% of Ni, 0.001% to 3.0% of Nb, 0.027% or less of C, 0.025% or less of N, 4.5% or less of Hf and 0.16% or less of O with the remainder being inevitable impurities and zirconium, being formed of a bulk alloy and a surface layer, in which the surface layer has a plastic strain of 3 or more or a Vickers hardness of 260 HV or more and an arithmetic mean surface roughness Ra of 0.2 &#x3bc;m or less.

Zirconium alloy material

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Toyohashi, Japan

Nozomu Adachi