MIL-PRF-1149D
TABLE VII.
Defects.
Category
Item
Defect
Major
101
Appearance and workmanship
Not uniform; not homogeneous
102
Shape
Not form specified
103
Dimensions and tolerances
Not as specified
Minor
201
Appearance and workmanship
Contains dirt or foreign matter
202
Marking
Not legibly identified with
cure date as specified; marking
missing
4.3.2.2 Examination for age. Material shall be examined for conformance to
the age requirement (see 3.2.2). Material over the maximum 12-month age limitation
shall be rejected. When the cure date cannot be determined, this shall also be
cause for rejection.
4.4 Nonconformance. If any of the samples in the first article tests or
conformance tests are found not to be in conformance to the requirements of this
specification, this shall be cause for rejection. In addition, if a sample fails in
a first article test, subsequent lots shall be subjected to the test or tests that
failed. This additional testing shall be discontinued and tests returned to the
normal basis of section 4 when four successive lots have been accepted.
4.5
Tests.
4.5.1 Pre-test conditioning. Unless otherwise specified in the test method,
all specimens shall be conditioned for 4 hours at 80 ± 9 degrees Fahrenheit ( F) (27
± 5 degrees Celsius ( C)). Sample preparations may be done without regard to this
criteria.
4.5.2 Tensile strength and ultimate elongation. Tensile strength and
ultimate elongation shall be determined in accordance with ASTM D 412, using die C
specimens of 0.080 ± 0.010 inch.
4.5.3 Hardness. Hardness shall be determined in accordance with ASTM D 2240
using a Shore A durometer.
Specific gravity shall be determined in accordance
4.5.4 Specific gravity.
with ASTM D 792.
4.5.5 Oven aging. Specimens for the oven aged tensile strength, ultimate
elongation, hardness test, and hot compression set test shall be aged in accordance
with ASTM D 573 for 94 ± 0.5 hours at 158 ± 2 F (70 ± 1.1 C). Determination of aged
tensile strength, ultimate elongation, and hardness properties shall be made not
less than 20 hours or greater than 48 hours after removal from the oven.
4.5.6 Tensile strength and ultimate elongation after oven aging. Tensile
strength and ultimate elongation shall be determined after oven aging (see 4.5.5)
using the procedure specified in 4.5.2.
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