MIL-DTL-46177C(MR)
TABLE V.
Waviness tolerance for plates, inch.
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Flatness tolerance
When number of waves in l2 ft is:
from table IV
l
2
3
4
5
6
7
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1/2
0.50
0.375
0.3125
0.1875
0.1875
0.1250
0.0625
3/4
0.75
0.5625
0.4375
0.3125
0.2500
0.1875
0.1250
1
1.00
0.7500
0.5625
0.4375
0.3125
0.2500
0.1875
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NOTE 1:
Waviness denotes the deviation of the top or bottom surface from
horizontal line, when the plate is resting on a flat surface, as
measured in an increment of less than l2 ft of length. The waviness
tolerance is a function of the flatness tolerance as obtained from table IV.
Note 2:
When the flatness tolerance is 1/2 inch or less for plates up to
1/4 inch or less in thickness, the waviness tolerance shall not apply.
3.2.9 Information required. A report showing the complete details of the heat
treatment of each lot shall be furnished to the procuring activity. A
certification of the chemical composition of the steel shall be furnished with
the ballistic test plates. All elements of the chemical composition shall be
shown, including special additives or hardening agents, whether shown in table I
or not. The method of sulfide shape control shall be reported. Hardness test
results for each plate and impact test results for each lot shall be included in
the report (see 6.2).
3.2.10 Ballistic test plate information. A property executed armor data report
shall be submitted to the procuring activity containing the information as
specified in MIL-STD-662.
3.2.11
Workmanship.
3.2.11.1 Surface condition. The top and bottom surface of each plate shall be
free from the following surface defects: slivers, laps, checks, seams, blisters,
snakes, cold shuts, cracks, burning, mechanical seams, mechanical gouges and
laminations (see 6.8). The surface of each plate shall be such that mill scale
or oxidation product shall not interfere with determination of acceptability.
Imperfections listed above which are of such a nature as to affect the
fabrication of the material, are rejectable.
3.2.l1.1.1 Depth of imperfections. The depth of rolled-in scale, scale pitting
or snakes shall not exceed 0.015 inch and shall not reduce the steel thickness
below the allowable minimum. Isolated individual pits over 0.015 inch deep but
not over 0.03 inch deep and not within 6 inches of each other and which do not
violate the minimum allowable thickness, as specified in the applicable drawings
and fabrication documents, are acceptable.
3.2.11.2 Edge preparation. Thermal cutting shall be permitted after final heat
treatment provided the procedure, which may include grinding after thermal
cutting, is such that no cracks develop on any thermally cut edge whether
detected by nondestructive inspection, or as agreed upon in the contract. The
heat affected zone of thermally cut plates shall not exceed 1.2 times the plate
7
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