MIL-DTL-46063H
4.5.2.5 Ballistic testing. One plate, 12 inches by 36 inches (+1, -0 inches)
from the ordered thickness representing the lot, shall be selected for ballistic
testing. The orientation of these plates with respect to the rolling direction
shall be at the option of the manufacturer (see 6.2).
4.6
Examination.
4.6.1 Visual. Each plate shall be examined to determine compliance with
the identification marking (see 3.8) and workmanship (see 3.10) requirements.
4.6.2 Dimensional. Plates within a lot shall be measured to determine
compliance with the requirements for dimensions and tolerances (see 3.7) in
accordance with the sampling procedures approved by the procuring activity.
4.7
Tests.
4.7.1 Chemical composition. Test samples shall be prepared and tested in
accordance with ASTM methods E34, E227, E607, or E1251. In case of dispute, the
analysis by method ASTM E34 shall be the basis for acceptance or rejection.
4.7.2 Mechanical properties. Tension test specimens shall be prepared and
tested in accordance with ASTM B557. Test specimens shall be taken in the long
transverse direction.
4.7.3 Stress corrosion. Short transverse stress corrosion test specimens
shall be prepared and tested in accordance with the procedure outlined in ASTM G38
and G47. The specimens shall be stressed 35 ksi. Nine specimens shall be tested
per sample per lot. A maximum delay of 3 hours between stressing and initiation of
stress corrosion test is permitted.
4.7.3.1
Report of results.
The report shall include the following:
a. The producer and lot number.
b. Specification and contract number.
c. "Stress-corrosion test passed" or "stress-corrosion test failed" in
accordance with results of the test.
4.7.4 Ballistic testing. Ballistic testing shall be in accordance with
appendix A. Test plate thickness, as measured by the ballistic testing agency,
shall be used in conjunction with table V and appendix A to determine the test
projectile and the required V50 protection ballistic limit respectively. A
minimum of four thickness measurements, at least 2 inches from any edge, are to be
taken at random locations in the area to be impacted. A calibrated deep throat
micrometer or a calibrated ultrasonic measuring device, is to be used and the
individual measurements are to be read to the nearest 0.001-inch, will be reported
as the actual thickness of the plate. This thickness will be used to determine
the minimum ballistic limit, BL(P), requirement from the appropriate table in the
appendix. When necessary, interpolation between two consecutive thicknesses in
the table will be performed to determine the minimum required BL(P).
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