242, or 243 except as modified herein, to determine conformance with 3.3. The Rockwell hardness shall be taken with a 1/2-inch steel ball on a Rockwell standard or Rockwell superficial machine. The machine shall have a suspended load of 60 kg. The major load shall be applied for 10 seconds (after tripping), regardless of the apparent stopping of the scale pointer. With the Rockwell standard machine, the readings shall be taken from the red scale. Readings with either Rockwell or Brinell shall be taken on both sides of each sample. The first reading taken on each side shall be disregarded. The minimum thickness of the specimen to be tested shall be ten times the depth of the impression. In accordances with 3.3, the type of hardness tested used is optional.
4.6 Rejection and retests.
4.6.1 Rejections. If a test specimen fails to meet any of the requirements of this specification, it shall be cause for rejection of the lot represented
by the specimen. If any lead sheet fails to meet the visual or dimensional examination (see 4.4), the sheet shall be cause for rejection.
4.6.2 Retests. Retests shall be permitted in accordance with the provisions of Fed. Test Method Std. No. 151.
4.6.2.1 If a hardness test made within the 24-hour limit fails to meet the range specified in 3.3, a retest shall be permitted if completed prior to 24 hours after rolling. If the manufacturer fails to perform the hardness test within the 24-hour time limit, the hardness test may be performed 3 additional times with 5-day increments between tests. The results of the tests, if performed, shall be forwarded to the Government for evaluation and
determination of material acceptability.
4.7 Inspection of preparation for delivery. The preservation, packaging, packing, and marking shall be examined for conformation with the requirement of section 5.
5. PREPARATION OF DELIVERY
(For civil agency procurement, the definitions and application of levels of packaging and packing shall be in accordance with Fed. Std. No. 102.)
5.1 Packaging. Material shall be furnished in rolls or flat sheets (see
3.5 and 6.2).
5.2 Packing. Packing shall be level A, B, or C as specified (see 6.2).
5.2.1 Level A or B.
5.2.1.1 Flat sheets. Sheets of of one grade, size, and thickness shall be packed level A or B (see 6.2), in accordance with the requirements of
MIL-C-3993.
5.2.1.2 Rolls. Rolls of one grade, size, and thickness shall be packed level A or B (see 6.2), in accordance with the requirements of MIL-N-3944.
5.2.2 Level C. Material shall be packed in accordance with the supplier's commercial practice to assure receipt by carrier and safe delivery to the destination at the lowest transportation rate or rating. Containers shall conform to carrier regulations as applicable to the mode of transportation.
5.3 Marking.
5.3.1 Military agenciSeosu,rc.e: htItpns://aadssdisitt.dilao.mnil t--oDoawnnyloasdepde: c2i01a4l-09m-2a7rTk2i1:n5g4Z required
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