MIL-PRF-5425E
TABLE VI. Physical and mechanical inspection.
NUMBER
RESULTS RECORDED AS
OF DETER-
PASS
AVERAGE (1/)
REQUIREMENT
TEST
MINATIONS
OR
NUMERICALLY
CHARACTERISTIC
PARAGRAPH
PARAGRAPH
PER SAMPLE
FAIL
TO THE NEAREST:
-
0.1 °C
Flexural
Table II
4.5.5
2
deformation
temperature
-
Luminous
Table II
4.5.9
2
0.1 percent
transmittance, as
received
-
Haze, as received
Table II
4.5.9
2
0.1 percent
-
Optical defects
3.6.1
4.5.12.1
2
X
-
Angular deviation
3.6.2
4.5.12.2
2
1 minute
-
Thermal stability
Table II
4.5.13
1
X
1/ All values shall be recorded.
4.4 Test conditions.
4.4.1 Standard conditions. Unless otherwise specified in the applicable test method, all tests
and inspections shall be conducted at a temperature of 77 ±2 °F (25 ±1 °C) and a relative
humidity of 50 ±5 percent.
4.4.2 Test results. Unless otherwise specified in the applicable test method, all test results
shall be recorded as the average of the number of specimens being tested as well as each
individual value.
4.5 Methods of inspection.
4.5.1 Thickness. Thickness measurements shall be made with any device having an accuracy
of 0.001 inch (0.025 mm) and shall meet the requirement of 3.2.3.
4.5.2 Coefficient of thermal expansion. Two test specimens shall be tested in accordance
with ASTM-D696. If the results obtained on the two specimens are within 10 percent, the
average of the two values shall be recorded. If not, the test shall be repeated. Results shall meet
the requirement in table II.
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