A-A-52302
Rubber properties.
The physical properties of the synthetic rubber gasket shall meet or exceed the values of table I when tested in accordance with the ASTM standard test procedures shown.
TABLE I. Physical Requirement of the Gasket and Corresponding Test Methods
|
Properties |
Requirement Values |
ASTM Test Method |
|
Original Properties |
||
|
Tensile Strength PSI (Minimum) |
1600 |
D412 |
|
Ultimate Elongation, % (Minimum) |
300 |
D412 |
|
Hardness, Shore A Durometer, Points |
65 ± 15 |
D2240 |
|
|
||
|
Properties After Oven Aging for 46 Hours at 212 °F (100 ±2 °C) |
||
|
Tensile Strength Retained, % (Minimum) |
80 |
D573 |
|
Ultimate Elongation Retained, % (Minimum) |
80 |
D573 |
|
Hardness Change, Shore A, Points Maximum |
10 |
D2240 |
|
Compression Set, % Maximum |
40 |
D395 |
|
|
||
|
Properties After Immersion in ASTM Reference Fuel B for 70 Hours at 73.4 °F (23 ±2 °C) |
||
|
Tensile Strength Retained, % Minimum |
45 |
D471 |
|
Elongation Retained, % Minimum |
60 |
D471 |
|
Volume Change, % Maximum |
+ 25 |
D471 |
|
|
||
|
Maximum Volume Change After Immersion in ASTM Reference Fuel B for 70 Hours at 73.4 °F (23 ±2 °C) |
||
|
% Maximum |
15 |
D471 |
|
|
||
|
Properties After Immersion in Type IV Reagent Water for 166 Hours at 160 °F (70 ±2 °C) |
||
|
Tensile Strength Retained, % Maximum |
65 |
D471 |
|
Volume Change, % Maximum |
35 |
D471 |
|
|
||
|
Low Temperature Properties after Conditioning for 70 Hours at -31 °F (-35 ±2 °C) |
||
|
Compression Set, % Maximum |
50 |
D1229 |
|
Torsional Stiffness Ratio, Maximum |
10 |
D1053 |
|
|
||
|
Low Temperature Properties after Extraction in Reference Fuel B for 70 Hours at 73 °F Dried and Cold Conditioning for 70 Hours at (-35 ±2 °C) |
||
|
Compression Set, % Maximum |
55 |
D1229 |
|
Torsional Stiffness Ratio, Maximum |
10 |
D1053 |
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