| CHARACTERISTICS | REQUIREMENTS | TEST METHOD |
|---|
| MINIMUM | MAXIMUM |
|---|
| Durometer Hardness, Shore A |
60 |
70 |
ASTM D2240 |
| Specific Gravity |
1.118 |
1.158 |
ASTM D297 |
| Tensile Strength, (PSI) |
3000 |
|
ASTM D412 |
| Ultimate Elongation (%) |
450 |
|
ASTM D412 |
| 300% Modulus (PSI) |
900 |
|
ASTM D412 |
| Compression Set |
|
30% |
ASTM D395, Method B, 22 hours at 70°C, 25% deflection, 1/2 hour recovery |
Water Absorption
Age the specimen first at 70, +/- 2°C for 22, +0.25/-0 hours, in an air oven, use this weight as W1, then perform the water absorption test. |
|
5% by weight |
ASTM D471, 168 hours at 70°C, Distilled Water |
Oxygen Bomb Again
(% Change in Tensile Strength) |
80% of Min. Specified Tensile (i.e., 2,400 psi min.) |
|
ASTM D572, Aged 48 hours at 70°C at 300 PSI O2 in Pressure Vessel |
| Low Temperature Brittleness |
All Pass with No Cracks |
|
ASTM D2137, Method A, Parameter 9.3.2; 5 Modified T-50 Specimens, 3 min at -40°C |