MIL-STD-186 Protective Finishing For Army Missile Weapon SystemsThis standard establishes the minimum requirements for procedures, materials, and systems for cleaning, plating, painting and finishing metals, wood, electronic materials, parts and assemblies for rockets, guided missiles, and components to protect them from deterioration.

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Code No.

Treatment

801

802

803

804

805

806

808

809

Stress relieve prior to plating at 357.2° ± 11°C or 10°C below the tempering temperature, whichever is lower, for 2 to 3 hours (for ferrous alloys having a hardness greater than Rockwell C40).

Hydrogen embrittlement relieve at 190.5° ± 11°C for 23 hours within 8 hours after plating.

Hydrogen embrittlement relieve at 190.5° ± 11°C for 3 hours within

8 hours after phosphating.

Hydrogen embrittlement relieve at 190.5° ± 11°C for 3 hours after initial plating, then at 190.5°C ± 11°C for 23 hours after final plating.

Apply marking ink, A-A-208, color to be specified on drawing if other than black; for metal and glass, coat with varnish (consult ASTM D 3955 and ASTM D 295-58) (Code 497).

Apply marking ink, A-A-56032, color to be specified on drawing if other than mat black, for metal and glass.

Shot peening of metal parts, SAE AMS-S-13165. Use code 808.