CORROSION-RESISTANT STEEL FOR USE IN CHIMNEY OR FLUE OF NATURAL GAS COMBUSTION OR LIQUEFIED PETROLEUM GAS COMBUSTION PLANT

摘要

Provided is a corrosion-resistant steel for use in a chimney or a flue of a natural gas combustion or liquefied petroleum gas combustion plant, which has a steel composition containing C (0.005% or more but not more than 0.030%), Si (0.18% or more but not more than 0.50%), Mn (1.50% or more but less than 3.00%), P (0.030% or less), S (0.0050% or less), Cr (4.0% or more but not more than 9.0%), Al (0.20% or more but not more than 1.50%), and N (0.020% or less), and with which pitting and scattering of rust flakes due to the progress of local corrosion such as pitting corrosion can be prevented.