Jfe Steel Corporation

Makoto Kitazawa

Takaaki Toyooka

Takatoshi Okabe

Yoshikazu Kawabata

Akira Yorifuji

Masatoshi Aratani

Motoaki Itadani

A stainless steel tube having excellent formability for secondary operation comprises: a chemical composition including not more than 0.20 mass % of C; not more than 1.5 mass % of Si; not more than 2.0 mass % of Mn; 10-18 mass % of Cr; not more than 0.03 mass % of N; or further at least one type of element selected from the group of: not more than 0.6 mass % of Cu; not more than 0.6 mass % of Ni; not more than 2.5 mass % of Mo; not more than 1.0 mass % of Nb; not more than 1.0 mass % of Ti; and not more than 1.0 mass % of V; Fe as the remainder and the inevitable impurities; and a structure constituted of ferrite or ferrite and martensite, wherein the TE value defined by the following formula exceeds 25,000 Mpa&middot;%, TE&equals;TS&times;(El&plus;21.9) TS represents the tensile strength in the tube axial direction, and El represents the elongation in such direction.

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Handa, Japan

Makoto Kitazawa