MIL-DTL-17902G(SH)
4.5.8 Tests performed on rubber components. Tests, except the test for volume increase of the friction
compound after immersion in test fluid (see 4.5.8.3), shall be performed on specimens prepared from the sample
4.5.8.1 Tensile properties. Tests for tensile properties shall be performed on dumbbell specimens in
accordance with ASTM D412.
4.5.8.1.1 Initial tensile properties. Initial tensile strength and ultimate elongation at break shall be determined
in accordance with ASTM D412.
4.5.8.1.2 Tensile properties after immersion. The tensile strength and ultimate elongation after immersion shall
be measured by the procedure specified in ASTM D471, except the samples shall be immersed in Reference Fuel B
for 46 hours at 70 °F. Tensile strength shall be based on the swollen cross-sectional areas of the specimen.
4.5.8.1.3 Tensile properties after oven aging. The tensile strength and ultimate elongation shall be determined
after oven aging for 70±¼ hours at 212±2 °F in accordance with ASTM D573.
4.5.8.2 Adhesion. The adhesion between the several parts of the hose shall be determined initially and after
immersion in test fluid. The adhesion shall be such that the rate of separation shall be not greater than 1 inch per
minute under the minimum loads shown in table VII.
4.5.8.2.1 Initial adhesion. The initial adhesion between the tube and breaker ply, between the cover and outer
reinforcement plies, and between the reinforcement plies and the filler on the wire helix shall be determined in
accordance with ASTM D413.
4.5.8.2.2 Adhesion after immersion. The adhesion after immersion shall be determined as specified in
4.5.8.2.2.1 through 4.5.8.2.2.3.
4.5.8.2.2.1 Test specimen. A 2-foot length shall be cut from the sample hose obtained as specified in table X.
4.5.8.2.2.2 Apparatus. The apparatus for subjecting the test specimen to the action of the immersion fluids
shall be as shown on figure 6, or equivalent.
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