scope:

This specification covers alloy steel bars, billets and forgings for nitriding, and requirements for finished components.

Nitriding steel shall be of the following classes, conditions, and finishes, as specified (see 6.2).

Classes Class A (135M) - Nitriding steel (modified) Class B (EZ) - Nitriding steel (free machining) Class C (N) - Nitriding steel (nickel) Class D (135G) - Nitriding steel (standard) Conditions Condition 1 - As rolled, not heat treated (bars and billets) Condition 2 - Quenched and tempered (bars and forgings) Condition 3 - Annealed (bars and forgings) Condition 4 - Normalized and tempered Finishes Type I - As forged or as rolled Type II - Pickled or blast cleaned Type III - Rough turned Type IV - Cold drawn Type V - Turned, ground and polished

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:

This material should be specified for use in machinery and ordnance applications where extremely hard wear resistant surfaces are needed.