ASTM A 890/A 890M - 07 Standard Specification for Precipitation Hardening Iron Base Superalloy Forgings for Turbine Rotor Disks and Wheels

American Society for Testing and Materials (ASTM). Current edition approved May 1, 2007. Published May 2007. Originally approved in 1988. Last previous edition approved in 2003 as A 891 – 98 (2003). 3 p. This specification covers precipitation hardening iron
base superalloy forgings which are primarily intended for use as turbine rotor disks and wheels.
Two heat treatments are covered. Selection will depend upon design, service conditions, mechanical properties, and elevated temperature characteristics.