Compound 7157 Data Sheet
90-duro NBR
| ASTM Method |
Property |
Avg. Value |
Min. Value |
| D412 Method A |
Tensile Strength |
3436 psi |
2837 psi |
|
Ultimate Elongation |
170% |
100% |
|
Stress at Elongation |
|
|
|
- M25 |
641 psi |
|
|
- M50 |
952 psi |
406 psi |
|
- M100 |
1779 psi |
1200 psi |
|
Strain Energy/ Unit
Volume at 20% elongation |
72 psi |
|
|
Calculated Shear Modulus,
G |
1672 psi |
|
|
Calculated Youngs
Modulus, E |
5032 psi |
|
|
E-secant from the initial
slope |
4730 psi |
|
| D624, Die B |
Tear Strength |
296 lbf/inch |
|
| D297, 15 |
Specific Gravity |
1.294 |
|
| |
|
Max Value |
Min Value |
| D2240, Type A |
Durometer Hardness |
91 points |
86 points |
| |
|
|
|
| D395, Test B |
Compression Set |
Avg. Value |
|
|
22 hrs @ 212F |
10% |
|
|
70 hrs @ 212F |
15% |
|
|
336 hrs @ 212F |
28% |
|
ASTM D865 - Dry Heat Aging:
| Hours Aged |
Change in Tensile |
Change in Elongation |
Change in Durometer |
| 70 hrs @ 212F |
-1.4% |
29.6% |
3 points |
| 168 hrs @ 212F |
-2% |
3.2% |
3 points |
| 336 hrs @ 212F |
-5.7% |
-18.4% |
4 points |
| 1000 hrs @ 212F |
-14.5% |
-37.6% |
6 points |
Temperature Properties and Shelf Life:
| ASTM / Other |
Description |
Value |
| D746 |
Brittle Point |
|
| D1329 |
Temp Retraction TR-10 |
|
| |
Glass Transition |
-13F |
| |
Max Operating Temp |
|
| |
Shelf Life (years) |
|
Rev. 11/25/2003
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