Sulfuric acid and hydrochloric acid dew point corrosion steel as well as the exhaust gas flow path components

摘要

PROBLEM TO BE SOLVED: To achieve a simultaneous improvement of a sulfuric acid dew-point corrosion resistance and hydrochloric acid dew-point corrosion resistance without relying on Sb-addition, in a steel based with an ordinary steel.;SOLUTION: The acid dew-point corrosion resistant steel is composed, by mass%, of 0.010-0.060% C, ≤0.50% Si, ≤1.50% Mn, ≤0.025% P, ≤0.025% S, 0.10-0.50% Cu, ≤0.30% Ni, 0.10-0.25% Cr, 0.03-0.07% Mo, ≤0.100% Al and the balance Fe, and impurities. The steel is useful as a flow path structure member of especially combustion exhausting gas in a coal-combustion thermal-power plant or the combustion exhausting gas in a waste material incinerating facility.;COPYRIGHT: (C)2012,JPO&INPIT