MIL-DTL-12560K (MR)
TABLE VI. Ballistic test plate sizes and corresponding test projectiles for first article and
acceptance testing.
Minimum
size 1/ of
Nominal thickness
Armor
Test projectile and
TABLE
test plates,
obliquity
range, inches
Class
inches
0.098 to 0.230 incl.
1&4
12 x 36
Cal .30 M2 Ball at 30°
A-I
0.231 to 0.624 incl.
1
12 x 36
Cal .30 M2 AP at 0°
A-II
0.250 to 0.624 incl.
3
12 x 36
Cal .30 M2 AP at 0°
A-II
0.625 to 1.125 incl.
1&3
12 x 36
Cal .50 M2 AP at 0°
A-III
1.126 to 2.750 incl.
1, 3 & 4
12 x 36
20 mm M602 APIT at 0°
A-IV
2.751 to 3.500 incl.
1&3
60 x 72
90 mm M82 APC at 45°
A-V
3.501 to 3.999 incl.
1&3
60 x72
90 mm M82 APC at 30°
A-VI
4.000 to 6.000 incl.
1&3
60 x 72
90 mm M318A1 AP at 0°
A-VII
Over 6.000 2/
3
---
---
---
0.098 to 0.249 incl.
2
12 x 36
Cal .30 FSP at 0°
A-VIII
0.250 to 0.499 incl.
2
12 x 36
Cal .50 FSP at 0°
A-IX
0.500 to 1.000 incl.
2
12 x 36
20 mm FSP at 0°
A-X
Over 1.000 2/
2
---
---
---
0.231 to 0.354 incl.
4
12 x 36
Cal .30 M2 AP at 30°
A-XI
0.355 to 0.590 incl.
4
12 x 36
Cal .50 M2 AP at 30°
A-XII
0.591 to 0.765 incl.
4
12 x 36
14.5 mm B32 API at 30°
A-XIII
0.766 to 1.125 incl.
4
12 x 36
14.5 mm BS41 API at 30°
A-XIV
1/
Other sizes may be submitted for the convenience of the manufacturer if approved by the Armor Vulnerability
Division, USATC, Aberdeen Proving Ground.
2/
No ballistic test required.
4.6.1.2 Impact samples. At least one impact test sample shall be taken from near each submitted
test plate in accordance with 4.8.3.1 or 4.8.3.2 and each shall consist of enough material for six
impact specimens.
4.6.1.3 Bend test. Two bend test samples shall be tested in the transverse direction.
4.6.1.4 Decarburization. At least one decarburization test sample shall be taken on each plate
selected for the ballistic tests for plates with an ordered thickness of 0.500 inch and less.
Complete and partial decarburization shall be less than 0.017 inch when tested in accordance
with ASTM E1077 (see 4.8.5).
4.6.1.5 Ultrasonic examination. Each submitted test plate greater than 0.625 inch in thickness
shall be ultrasonically examined in accordance with 4.7.3.
4.6.1.6 Ballistic test plates. Two ballistic test plates for each nominal thickness range (see Table
VI) shall be randomly selected and submitted for ballistic test. Any thickness within the range
can be chosen to represent any other thickness in the range but the two plates submitted shall be
of the same ordered thickness. The average thickness of each test plate shall be determined at
the test site by the test agency as indicated in 4.6.2.5.
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