HIGH TEMPERATURE CORROSION RESISTANT NI BASE ALLOY FOR WASTE HEAT BOILER OR MUNICIPAL REFUSE INCINERATOR

摘要

PURPOSE: To suitably solve the problem accompanied by the increasing temp. and pressure of a waste heat boiler by enabling the regulation of the steam temp. of waste heat boiler operation to ≥300°C and to provided the material for a heat exchanger capable of executing advantageous operation and showing high corrosion resistance in a waste heat boiler environment of a municipal refuse incinerator. ;CONSTITUTION: This high temp. corrosion resistant Ni base alloy for the waste heat boiler of a municipal refuse incinerator contains, by weight, 0.01 to 0.1% C, 0.2 to 3.0% Si, 0.5 to 3.0% Mn, ≤0.03% P, ≤0.03% S, 0.5 to 5.0% Al, ≤0.04% N, 15 to 35% Cr, 0.5 to 5.0% Mo, ≤30% Fe and the balance Ni with inevitable impurities and in which the content of Cr, Ni and Fe satisfies the relational formula of 1.0[%Ni]/([%Fe]+0.7×[%Cr])1.6.;COPYRIGHT: (C)1993,JPO&Japio