Seals Eastern, Inc.
Seals, gaskets, and o-rings
Compound 7345 Data Sheet
Description: HNBR for oil & gas service
Physical Properties:
ASTM Method Property Avg. Value Min. Value
D412 Method A Tensile Strength  3940 psi  3900 psi
Ultimate Elongation  425%  420%
Stress at Elongation    
- M25  185 psi   psi
- M50  245 psi  237 psi
- M100  410 psi  335 psi
Strain Energy/ Unit Volume at 20% elongation  23 psi  
Calculated Shear Modulus, G  499 psi  
Calculated Youngs Modulus, E  1490 psi  
E-secant from the initial slope  1400 psi  
D624, Die B Tear Strength  440 psi  
Max Value Min Value
D2240, Type A Durometer Hardness  67 points  73 points
D297, 15 Specific Gravity  1.14  
D395, Test B Compression Set Avg. Value  
22 hrs @ 212F %  
70 hrs @ 212F 31%  
336 hrs @ 212F %  
D865 Dry Heat Aging
Change in Tensile Change in Elongation Change in Durometer
70 hrs @ 212F -1% -13% 4 points
168 hrs @ 212F % %  points
336 hrs @ 212F % %  points
1000 hrs @ 212F  %  %  points
  Temperature Data  
D746 Brittle Point  F
D1329 Temp Retraction TR-10  F
Glass Transition  -13F
Max Operating Temp  300F
Rev.  4/1/2002 Shelf Life (years) 10


LEGAL NOTICE: Seals Eastern makes no representations or warranties, implied or otherwise, on the accuracy or completeness of the data herein.

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Format Rev: 11/17/11