MIL-DTL-46083D(MR)
additional sample shall be taken for each 1,000 pounds or fraction thereof in
excess of the first 1,000 pounds. From material having a nominal weight of one
pound or more per lineal foot, one tension-test sample shall be taken from
each inspection lot consisting of 1,000 feet, or less; from inspection lots
consisting of more that 1,000 feet, one additional sample shall be taken from
each 1,000 feet or fraction thereof in excess of the first 1,000 feet. Only
one tension-test specimen shall be taken from any one piece when more that one
piece is available.
d. Ballistic tests. Because of the variety of possible shapes and sizes
the manufacturer must contact the ballistic test agency to determine the
minimum number of extrusions per lot which are needed to conduct the ballistic
test(s).
4.6
Examination.
4.6.1 Visual. Each extrusion shall be examined to determine compliance
with the identification marking (see 3.7) and workmanship (see 3.9)
requirements.
4.6.2 Dimensional. One extrusion from each lot (see 4.4) shall be measured
to determine compliance with the requirements for dimensions and tolerances
(see 3.6 and 3.6.1).
4.6.3 Preparation for shipment. Prior to shipment, examination shall be
made to determine compliance with section 5.
4.7
Tests.
4.7.1 Chemical composition. Chemical analysis shall be conducted in
accordance with ASTM methods E34, E227, E607, or E1251.
4.7.2 Mechanical properties. Tension test specimens shall be prepared and
tested in accordance with ASTM B557. The specimens shall be taken from the
extruded shape in the longitudinal direction. From shapes of nominal
thickness of 0.75 to 1.50 inches, inclusive, tension test specimens shall be
taken with the axis midway between the extruded surfaces; from shapes of
nominal thickness greater than 1.50 inches, the axis of the test specimen
shall be three-fourths of the distance from one surface to the other.
4.7.3 Ballistic testing. Ballistic testing shall be in accordance with
appendix A. Test extrusions shall be tested at locations specified on the
drawing or in the contract (see 6.2). Extrusions shall be tested in accordance
with the thickness ranges shown in table III to determine the projectile as well
as the required V50 protection ballistic limit (see A.5.1.2). Extruded shape
thickness as measured by the ballistic test agency shall be used to determine the
required ballistic limit. Individual thickness measurements are read to the
nearest 0.001 inch and the average of these readings reported to the nearest
0.005 inch. Thickness measurements of the extruded shape shall be made of the
areas to be ballistically tested.
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