Steel for pressure vessel excellent in resistance to high temperature tempering heat treatment and post-weld heat treatment and method for producing the same

摘要

The present invention relates to a steel material for a pressure vessel used for a boiler, a pressure vessel, a fitting, etc. of a power plant, and more particularly, to a steel material for a pressure vessel having excellent resistance to high-temperature tempering heat treatment and post-weld heat treatment and its production. About the method. [Selection diagram] None