Form:

This specification presents the requirements for chrome-nickel-molybdenum (8740) steel bars and reforging stock of aircraft quality.

Classification:

Physical condition: Material shall be of the following physical conditions, as specified (see 6.2):

(A) As forged

(B) As rolled

(C) Annealed

(D) Normalized

(E) Normalized and tempered

(F) Hardened and tempered 

Surface condition: Material shall be of the following surface conditions, as specified (see 6.2);

1. Black as forged or rolled

2. Pickled or blast cleaned

3. Rough turned

4. Cold drawn

5. Turned, ground and polished

6. Turned and polished