MIL-DTL-46192C(MR)
4.7.2 Mechanical properties.
The mechanical properties shall be determined in
accordance with ASTM B557.
4.7.3 Resistance to stress corrosion.
Stress corrosion testing shall be
conducted in accordance with ASTM G47.
4.7.4 Ballistic tests:
Plates shall be tested using projectiles chosen in
accordance with the thickness ranges shown in table V. Plate thickness as
determined by the ballistic test agency shall be used to determine the required
ballistic limit for that plate. Individual thickness measurements are to be
read from a deep throat micrometer or by means of an ultrasonic device to the
nearest 0.001 inch and the average of these readings reported to the nearest
0.005 inch. Measurements shall be made on the intended impact area.
4.8
Examination.
4.8.1 Dimensions. Each plate within the lot shall be measured to determine
compliance with the requirements for dimensions and tolerances (see 3.7) or the
lot shall be sampled in accordance with sampling procedures approved by the
procuring activity.
4.8.2 Visual. Each plate shall be examined to determine compliance with the
identification marking (see 3.8) and workmanship (see 3.9) requirements.
TABLE V. Acceptance ballistic test plates.
________________________________________________________________
Ordered or nominal design
thickness specified on
Test
Projectile
drawings, inches
angle
to be used
o
0.500-0.749
30
Cal. .30 AP, M2
o
0.750-1.500
0
Cal. .30 AP, M2
o
0.750-0.950
0
Cal. .50 FS
o
0.951-1.500
0
20 mm FS
o
(a) 1.501-3.000
0
Cal. .50 AP, M2
o
(a) 3.001-4.000
0
14.5 mm API, BS41
______________________________________________________________
(a) Ballistic limit requirements have not been developed for this thickness
range.
4.8.3 Preparation for shipment. Prior to shipment, examination shall be made
to determine compliance with section 5.
4.9
Rejection and retest.
4.9.1 First article. Failure of the first article test plates to meet the
requirements of 4.3.1 indicates rejection of the product and process.
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