Ishihara Chemical Co., Ltd.

Dai-ichi High Frequency Co., Ltd.

Seiichiro Miyata

Tadao Komatsu

Yoichi Matsubara

Akihiro Takeya

A clad pipe includes an external layer and a coating layer made of Ni base anticorrosion alloy. Both end portion areas of the coating layer are formed by a build-up welded layer (Ni base alloy of composition) on the inner surface of the external layer. Other areas are formed by a Ni base alloy layer (Ni base alloy of composition) fusion-bonded to the build-up welded layers and the inner surface of the pipe, a solidus-curve temperature of the Ni base alloy layer being 1300&#xb0; C. or below and lower than a solidus-curve temperature of the Ni base alloy formed by build-up welding by 150&#xb0; C. or more. Compositionand compositionare adjusted so that, in the same environment, corrosion resistance of the Ni base alloy of compositionis equivalent to or superior to that of the Ni base alloy of composition

Clad pipe

The invention provides composites made from a carbon-based material and a meallic material by joining them together by means of a brazing filler metal which is an alloy comprising, as essential components thereof, at least one element selected from among vanadium, niobium, titanium, zirconium and silicon and at least one element selected from among copper, silver, nickel and aluminum as well as welding nozzles made by joining a ring made of a carbon-based material to the tip of a metal nozzle using said brazing filler metal.

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Shimonoseki, Japan

Seiichiro Miyata