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|  MIL-P-64036(AR)
4.4.3 Testing. The following tests shall be performed in
accordance with the provisions of Table I and 4.4.
4.4.3.1 Mechanical properties.
4.4.3.1.1
Hardness (forgings). See 4.4.1.1.
In order to
determine the body forgings that will be used for the tension test,
the base of each body forging in the forging lot, after heat
treatment and prior to machining, shall be subjected to a hardness
test with a Rockwell Hardness Tester or by any other method of
hardness testing approved by the procuring activity.
4.4.3.1.2 Hardness (cold shapings). See 4.4.1.2 in order to
determine the bodies formed by cold shaping that will be used for
the tension test, the base of 25 bodies in the cold shaping lot,
after stress relief and prior to machining, shall be subjected to a
hardness test with a Rockwell Hardness Tester or by any other method
of hardness testing approved by the procuring activity. See
4.4.5.3.1.
4.4.3.1.3 Tensile test. From 4.4.3.1.1 and 4.4.3.1.2, two
bodies, one of the softest and one of the hardest from each forging
or cold shaping lot (see 4.4.1) shall be subjected to this test to
determine compliance with the mechanical properties required by the
applicable drawing. Failure of one or more tension test specimens
to comply with the requirements shall be cause for rejection of the
lot representative of the specimen. See 4.4.5.3.1.
Adapter. One tension-test specimen shall be taken
4.4.3.1.4
from each of 2 bars representative of the production lot to
determine compliance with yield strength and elongation requirements
of the applicable drawing. Failure of either specimen to comply
shall be cause for rejection of the lot. See 4.4.5.3.2.
Each body assembly shall be
4.4.3.2 Air pressure test.
subjected to a submerged air pressure test to determine compliance
with the assembly drawing. Failure of any assembly to comply as
evidenced by the presence of air bubbles in the vicinity of the
brazed joint or rising to the surface of the water shall be cause
for rejection of the assembly. Body assemblies which comply shall
immediately upon removal from the test fixture be stamped with the
letter "A" as indicated on the assembly drawing. See 4.4.5.4.
4.4.3.3 Joint quality. After air pressure testing, but prior
to the application of protective coating, body assemblies shall be
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