Compound 7202 Data Sheet
70-duro NBR
| ASTM Method |
Property |
Avg. Value |
Min. Value |
| D412 Method A |
Tensile Strength |
3215 psi |
2480 psi |
|
Ultimate Elongation |
575% |
300% |
|
Stress at Elongation |
|
|
|
- M25 |
247 psi |
|
|
- M50 |
275 psi |
200 psi |
|
- M100 |
466 psi |
420 psi |
|
Strain Energy/ Unit
Volume at 20% elongation |
22 psi |
|
|
Calculated Shear Modulus,
G |
416 psi |
|
|
Calculated Youngs
Modulus, E |
1250 psi |
|
|
E-secant from the initial
slope |
1175 psi |
|
| D624, Die B |
Tear Strength |
|
|
| D297, 15 |
Specific Gravity |
1.19 |
|
| |
|
Max Value |
Min Value |
| D2240, Type A |
Durometer Hardness |
75 points |
65 points |
| |
|
|
|
| D395, Test B |
Compression Set |
Avg. Value |
|
|
22 hrs @ 212F |
10% |
|
|
70 hrs @ 212F |
14% |
|
|
336 hrs @ 212F |
21% |
|
ASTM D865 - Dry Heat Aging:
| Hours Aged |
Change in Tensile |
Change in Elongation |
Change in Durometer |
| 70 hrs @ 212F |
3.4% |
-4.8% |
1 points |
| 168 hrs @ 212F |
9.2% |
-22.4% |
3 points |
| 336 hrs @ 212F |
7.7% |
-34.8% |
4 points |
| 1000 hrs @ 212F |
8.4% |
-49.7% |
7 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) |
10 |
Rev. 5/16/2018
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