ALLOY STEEL HAVING CORROSION RESISTANCE AT HIGH TEMPERATURE AND SUPERHEATER TUBE

摘要

PURPOSE: To provide economical alloy steel having excellent corrosion resistance and a heat exchanger tube or a superheater tube using the alloy steel. ;CONSTITUTION: A superheater tube used in a hot corrosive environment contg. molten salt based on sulfate and chloride is made of alloy steel having corrosion resistance at high temp. and consisting of 12-30wt.% Ni, 18-30wt.% Cr, ≥2wt.% Mo and the balance essentially Fe or further contg. Nb and/or Ti as alloying components. A heat exchanger tube is composed of an outer tube made of the alloy steel as a corrosion resistant material and an inner tube made of a conventional material as a high strength material.;COPYRIGHT: (C)1993,JPO&Japio