Austenitic heat resistant alloy member and austenitic heat resistant alloy material

摘要

Problem to be solved: to provide an austenitic heat-resistant alloy member excellent in creep rupture strength and reheat cracking resistance and excellent in cracking resistance during hot working.Solution: a thickness of 20 mm or more, a chemical composition having a predetermined chemical composition, a metal structure in the surface layer is ASTM particle number 7.0 or more, and the microstructure in the central portion is ASTM particle size 4.0 or less The total number density of Ti carbides and Ti sulfides having a particle diameter of 50 nm or less in the center of thickness is 50 to 500 μ M3, austenitic heat resistant alloy member.No selection