scope:

This specification covers steel forgings that are produced by a hot deformation process such as hammering, pressing, upsetting, extruding, or any combination of these processes (see 6.1).

The forgings are classified for inspection purposes and shall be ordered (see 6.2) on the basis of grade and condition.

a. Grade A forging. Mechanical properties shall be measured in the body of the forging (test coupon - see 6.6.6) as well as in the integrally-forged test metal (see 6.6.7) or Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Director, Army Materials and Mechanics Research Center, ATTN: AMXMR-SMS, Watertown, Massachusetts 02172-0001 by using the self-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. the prolongation (see 6.6.3) at the locations shown on the applicable drawing. Correlation shall be determined by use of a value difference (see 6.6.8) between the properties of the test coupon of the forging and those of its integrally-forged test metal or the prolongation.

b. Grade A1 forging. Mechanical properties shall be measured in the body of the forging (test coupon - see 6.6.6) as well as in the integrally-forged test metal (see 6.6.7) or the prolongation (see 6.6.3) at the locations shown on the applicable drawing. Correlation shall be determined by use of a value difference (see 6.6.8) between the properties of the test coupon and those of its integrally-forged test metal or the prolongation. When the test metal or prolongation of a forging is not tested for mechanical properties, that forging shall be accepted on the basis of hardness.

c. Grade B forging. Mechanical properties shall be measured in the integrally-forged test metal or the prolongation from the forging at the locations shown on the applicable drawing.

d. Grade C forging. Mechanical properties of the forging shall be determined directly from the body of the forging (test coupon-see 6.6.6) from a selected or representative forging. Forgings not sectioned for testing shall be measured on the basis of hardness.

e. Grade D forging. Mechanical properties of the forging shall be measured on the basis of hardness only.

Forgings shall be furnished in the normalized, annealed, or normalized and tempered condition unless mechanical properties are specified on the applicable drawing or in the contract or order (see 6.2).

intended Use: