ASTM A469/A469M-07(2022)

Anotácia textu normy ASTM A469/A469M-07(2022) :

This specification covers vacuum-treated basic electric steel forgings for use in generator rotors. Steel materials shall be manufactured by vacuum degassing, heat treatment, rough machining, and boring. Heat and product analyses shall be carried out to examine conformation of the specimens with chemical compositions of carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, vanadium, and antimony. Forgings shall also go through tension, impact, and Charpy V-notch tests, and shall conform with the following tensile and notch toughness requirements: tensile strength, yield strength, elongation, reduction of area, FATT50, and Charpy absorbed energy. Nondestructive test methods such as ultrasonic and internal inspection shall be performed.


Keywords:
generator rotor forgings, steel forgings, vacuum-treated steel, vertical heat treatment, yield strength at 0.02 % offset,, ICS Number Code 77.140.85 (Iron and steel forgings)