MIL-DTL-45225F(MR)
6.2
Ordering data.
Acquisition documents should specify the following:
a.
Title, number, and date of this specification.
b.
Mechanical properties, thickness, and chemical composition of type II
forgings (see 1.1, 3.2, and 3.3).
c.
Type, class and alloy (see 1.2).
d.
DoDISS and supplement issue specified in the solicitation (see 2.2).
e.
When first article is required (see 3.1).
f.
Mechanical property requirements of type I forgings if different from
table II (see 3.3).
g.
Drawings, dimensions, and tolerances (see 3.6).
h.
Marking for identification (see 3.7, and 3.7.1).
i.
Ballistic test report (see 3.8).
j.
Destination of test forgings (see 4.2.1, 6.3).
k.
Locations of tension test specimens (see 4.7.4).
l.
Locations for determination of ballistic limits (see 4.8.3).
m.
Packaging requirements (see 5.1).
6.3
Ownership of ballistic test forgings.
6.3.1 First article and acceptance test forgings. First article and acceptance
test forgings that comply with the requirements of this specification are
considered as part of the lot of forgings that they represent, and ownership of
them passes to the government with acceptance of that lot. First article and
acceptance test forgings that fail to comply with the requirements of this
specification are considered as part of the lot they represent and remain the
property of the manufacturer as does the rejectable lot which they represent.
6.3.1.1 Failure of forgings. At the time of shipment of the first article and
acceptance test forgings, the government test activity should be informed by the
manufacturer, in writing, as to the disposition of first article and acceptance
test forgings which fail the test. If instructions for disposal of the tested
forgings are not received after 15 days, the testing activity will exercise the
prerogative of disposing of the material.
6.4 Ballistic tests. Testing should be in accordance with MIL-STD-662, V50
Ballistic Test For Armor, except that nothing in this procedure should be
construed to supersede or invalidate the requirements of this specification.
6.4.1 Temperature conditioning. Prior to the test, the test item(s) will be
temperature conditioned at least eight hours. Thermostatic control will be such
that the average temperature of the item during the test should be
72 + 15oF (22 + 8oC).
6.4.2
Ballistic limit protection, BL(P).
6.4.2.1 Normal circumstances. The BL(P) should consist of an equal number of
fair impact complete and partial penetration velocities attained by the
up-and-down firing method. All BL(P)'s should be computed using the highest
partial penetration velocities and the lowest complete penetration velocities.
Firing should continue until either a 4-round BL(P) having a maximum velocity
spread of 60 fps or a 6-round BL(P) having a maximum velocity spread of 90 fps
has been attained, whichever comes first in the normal sequence of firing. If
both occur simultaneously, the 6-round BL(P) will be reported.
6.4.2.2 Large zone of mixed results. In the event that the zone of mixed
results (difference between the high partial penetration velocity and the low
complete penetration velocity, the partial penetration velocity being higher than
the low complete penetration velocity) exceeds 90 fps, the firing data will be
compared with the specification minimum ballistic requirements. If the lowest
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