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|  MIL-W-50985A
4.4.3 Testing. Testing is described in the Quality
Conformance Inspection tables.
4.4.4 Inspection equipment. The inspection equipment
required to perform the examinations and tests prescribed herein
is described in the "Paragraph Reference/Inspection Method" column
in the tables starting with 4.4.2.1. The contractor shall submit
for approval inspection equipment designs in accordance with the
terms of the contract. See Section 6 of MIL-A-48078 and 6.3
herein. The contractor shall submit all inspection equipment
designs to the government for evaluation and approval prior to
fabrication of such equipment.
Test methods and procedures.
4.5
4.5.1 Microexamination. For ductile iron, a test lug shall
be cast representing the last metal poured from each ladle treated
with modularizing agent. The test casting and microexamination
shall be in accordance with ASTM-A-395. Failure of the test lug
to conform to the microstructure requirements of ASTM-A-395 shall
be cause for rejection of the castings from the ladle represented
by the test lug.
4.5.2 Hardness test. After final heat treatment, the
hardness test shall be performed on the body. Procedures for this
test are as prescribed by Federal Test Method Standard No. 151,
Method 242.1.
4.5.2.1 Warhead (malleable iron). To insure compliance with
the mechanical properties requirements, each body casting from a
sample shall be subjected to a hardness test with a Brinell
Hardness Tester. The sample, 10 percent minimum, representative
of extreme furnace environment, shall be selected from each heat
treat batch when a batch type furnace is used for final heat
treatment. When a continuous type furnace is used for final heat
treatment, from which a 10% minimum sample will also be selected,
a heat treat batch shall be considered quantity of castings not to
exceed 4 hours production. The castings which constitute the
sample shall be collected at regular continuous intervals
throughout the 4 hour cycle. The heat treat batch thus
constituted shall form the basis for selecting castings for the
tension test herein prescribed.
4.5.2.2 Warhead (ductile iron). To insure compliance with
the mechanical properties requirements listed in the
specifications listed on the warhead drawing, each warhead from a
sample shall be subjected to a hardness test with a Brinell
Hardness Tester. The sample shall be 1.5% minimum, representative
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