MIL-DTL-12235A (MR)
Control Point's packaging activities within the Military Service or Defense Agency, or within the
military service's system commands. Packaging data retrieval is available from the managing
Military Department's or Defense Agency's automated packaging files, CD-ROM products, or
by contacting the responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is
not mandatory.)
6.1 Intended use. The plate-proofing projectiles covered by this specification are intended for
use in impacting or shock-testing armor, armor weldments, and other armor structures.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a.
Title, number, and date of the specification.
b.
Caliber, type and millimeter required (see 1.2).
c.
Composition and heat treatment for steel projectiles (see 3.1.1.1.1).
d.
Quality of steel by indicating acceptable and rejectable micrographs (see 3.1.1.2, 4.3.4.2,
4.4.4.1, and 6.2).
e.
Cleaning method different then TT-C-490 (see 3.1.1.5).
f.
Surface requirements after painting (see 3.1.1.5).
g.
Composition and heat treatment for aluminum projectiles (see 3.1.2.1.1).
h.
Quality of aluminum projectiles (see 3.1.2.2, 4.3.4.2, and 6.2).
i.
If mechanical specimens are not tested in the longitudinal direction (see 3.1.2.3).
j.
Inspection facilities, if different (see 4.2).
k.
Inspection records (see 4.2).
l.
Inspection conditions (see 4.2.2).
m.
Submittal of product (see 4.3.2).
n.
Acceptance level (see 4.3.3).
o.
Number of hardness tests, if different (see 4.3.4.3).
p.
Number of tension specimens to be tested (see 4.3.5).
q.
Packaging requirements (see 5.1 and 6.7).
r.
Marking requirements (see 6.6).
6.3 Uniformity. It is essential that all projectiles procured under this specification give uniform
results in order that a single standard will be used for the qualification and acceptance tests of
armor plate, armor castings, and weldments thereof.
6.4 Seating of band. The necessity for firmly seating the rotating band so that the gilding metal
will be in contact with the projectile at all points can not be over-emphasized. Air gaps of even a
few thousandths of an inch result in differences in starting resistance when the band enters the
rifling. This causes variations in the burning characteristics of the powder which in turn affects
the muzzle velocity. It is essential that bands be fully and uniformly applied in order to obtain
satisfactory results.
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