| Polycorp
Rail Boot Compound Properties |
| Property |
Unit |
Requirement |
Limit |
Test Method |
| Hardness |
Shore A |
70 |
± 5 |
ASTM D2240 |
| Tensile Strength |
PSI |
1200 |
Min. |
ASTM D412 |
| Elongation |
% |
300 |
Min. |
ASTM D412 |
Volume Resistivity
(saturated NaCl solution) |
Ohm-cm |
10e12 |
Min. |
ASTM D257 |
Compression Set
22 hours at 70°C |
% |
35 |
Max. |
ASTM D395Method B |
Oven Aging
70 hours at 100°C |
|
|
|
|
| Tensile Strength Change |
% |
- 20 |
Max. |
ASTM D573 |
| Elongation Change |
% |
- 30 |
Max. |
ASTM D573 |
| Hardness Change |
% |
0 to + 10 |
|
ASTM D573 |
Ozone Resistance
70 hrs. @ 37°C, 20% elongation of T-50 specimen, 50 pphm
in air |
cracks |
None |
|
ASTM 1149 |
Low temperature resistance
Method A |
|
Non-brittle at - 40°Cafter 3 min |
Max. |
ASTM D2137 |
| Water Absorption |
% |
2 % |
Max. |
ASTM D570 |
Immersion in ASTM #1
Oil for 70 hours at 70°C |
|
|
|
|
| Volume change |
% |
+ 70 |
Max. |
ASTM 471 |
| Tensile change |
% |
- 50 |
Max. |
ASTM 471 |
| Elongation change |
% |
- 40 |
Max. |
ASTM 471 |
| Compression Deflection |
Psi |
|
|
|
| Unaged |
% |
25 |
Min. |
ASTM 575 |
Aged in ASTM #1,
70 hrs. @ 70°C |
% |
-65 |
Max. |
ASTM 575 |
Aged in Oxygen Bomb,
48 hrs @ 70°C 300 psi |
% |
-25 |
Max. |
ASTM 575 |
