MIL-DTL-46077G
3.6 Marking for identification. Unless otherwise specified in the contract or order that MIL-
STD-129 or any other markings shall be used (see 6.2), each plate shall be marked on one face
with the manufacturer's name or trademark, the basic number and revision letter of this
specification, the composition, the nominal plate thickness, and the lot number. Each plate
shall be marked in lengthwise rows of characters recurring at intervals not greater than 3 feet,
the rows being spaced not more than 6 inches apart and alternately staggered. The characters
shall be not less than 3/8 inch in height and shall be applied using a suitable marking fluid
whose residue shall contain not more than traces of halogen-bearing compounds and shall be
capable of being removed in hot alkaline cleaning solution without rubbing. The markings
shall have no deleterious effect on the plate material or its performance and shall be
sufficiently stable to withstand normal handling.
3.6.1 Marking of ballistic test plates. Each ballistic test plate shall be marked with a plate
identification code (see 3.6) and the letters `PRE' if a first article test plate and `ACC' if an
acceptance test plate. When practicable, the marking shall be an impression stamped on the
horizontal edge face of the ballistic test plates.
3.7 Heat treatment. Product shall be heat treated within prescribed temperature, time, and
atmospheric condition ranges established during first article testing or commonly approved
production runs.
3.7.1 Reheating. Unless otherwise approved by the procuring activity (see 6.2), after the final
heat treatment, material shall not be reheated or processed above the final annealing, stress
relieving, or aging temperatures or to a temperature that is 100° F below the beta transus,
whichever is less. If plates are retreated above these limiting temperatures, they shall be so
recorded and completely re-tested as a separate lot.
3.8 Ballistic test plate information. For each lot of titanium alloy armor plate a properly
completed Titanium Armor Test Data Form (see Figure 1) shall be submitted with each
ballistic test plate that represents that particular processing lot.
3.9 Finish. Unless otherwise specified (see 6.2), plate shall have a surface finish in accordance
with ASTM A480 after surface preparation (if necessary). Product shall be free of surface
contamination by oxygen (alpha case), hydrogen, carbon, nitrogen, or other such harmful
contaminants. The producer shall be permitted to remove minor surface imperfections by spot
grinding if such grinding does not reduce the thickness of the material below the minimum
permitted by the tolerance for the thickness ordered.
3.10 Workmanship. The material produced under this specification shall be uniform in quality
and condition, and free from harmful alloy segregation and surface contamination by oxygen,
nitrogen, or other contaminant and foreign material. The plate shall be clean, sound, smooth
and free of defects detrimental to fabricability or serviceability such as hard spots, laminations,
inclusions, pits, folds, seams, grind marks, and cracks.
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