scope:

This specification covers integral turbine rotor forgings for use in steam atmospheres which do not exceed the rated operating temperatures as specified in 1.2.

Steel forgings are of the following grades, as specified (see 6.2):

Maximum operating temperatures Grade A - Carbon steel 340 degrees Celsius (°C) (650 degrees Fahrenheit (°F)) Grade B - Nickel-molybdenum-vanadium 400°C (750°F) Grade C - Nickel-chromium-molybdenum-vanadium 400°C (750°F) Grade D - Nickel-chromium-molybdenum-vanadium 400°C (750°F) Grade E - Nickel-chromium-molybdenum-vanadium 400°C (750°F) Grade F - Chromium-molybdenum-vanadium 565°C (1050°F) Grade G - 12 percent chromium 400°C (750°F)

Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval Sea Systems Command, SEA 55Z3, Department of the Navy, Washington, DC 20362-5101 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter.

intended Use:

Forgings acquired under this specification are intended for use as turbine rotors at temperatures not exceeding those specified in 1.2.