SULFURIC ACID DEW POINT CORROSION RESISTANT STEEL AND EXHAUST GAS FLOW-PATH CONSTRUCTIONAL ELEMENT

摘要

PROBLEM TO BE SOLVED: To improve a sulfuric acid dew point corrosion resistant property without depending on Sb addition in a steel with an ordinary steel as a basis.;SOLUTION: The sulfuric acid dew point corrosion resistant steel is composed of, by mass, 0.005 to 0.200% C, 0.01 to 0.80% Si, 0.03 to 1.50% Mn, 0.002 to 0.020% P, 0.001 to 0.015% S, 0.10 to 0.50% Cu, 0.05 to 0.30% Ni, 0 to 0.30% Cr, 0.010 to 0.030% Mo, 0.005 to 0.100% Al, and the balance Fe with impurities. The steel is useful especially as a burnt exhaust gas flow-path constructional element in a coal-burning thermal power plant.;COPYRIGHT: (C)2012,JPO&INPIT