Nitrile 70 Specifications

NITRILE (BUNA-N) 70 DUROMETER

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Welcome to our Nitrile Specifications Section

Here you will find our Nitrile specifications chart which can also be downloaded in PDF. The Nitrile rubber properties that are listed below are for our most popular Nitrile 70 durometer (70A) rubber material compound. Make sure you review all of our other popular materials to make sure that the material you choose is correct for your application. If you need properties that are slightly different than the ones listed below, we can compound the formulation of the rubber material so that the Nitrile rubber specifications suit your needs. Finding the correct material especially if you are using it for an O-ring seal is important as the seal can degrade easily if the material is not compatible.

Nitrile is the most commonly used rubber material. This is due to Nitrile's compatibility with most environments as well as it's relative cost compared to other rubber materials. Mykin’s RN00170, Nitrile (BUNA-N) 70 durometer, is a general purpose copolymer of butadiene and acrylonitrile. This compound has a relatively high acrylo content, making it exceptionally resistant to petroleum base oils and hydrocarbon fuels over a temperature range of -40°F to +250°F. Nitrile has good mechanical properties when compared with other elastomers and high wear resistance. Unless they are specially compounded, Nitrile is not resistant to weathering, sunlight and ozone.


ASTM DesignationORIGINAL PROPERTIESASTM D2000 SPECIFICATION
  Durometer, Shore A 70+/-5
  Tensile, psi (MPa), Minimum 2031 (14)
  Elongation, % Minimum 250
  Specific Gravity -
  HEAT AGE, 70 HRS @ 100 C  
  Durometer Change, Points +/- 15
  Tensile Strength Change, % Maximum +/- 30
  Elongation Change, % Maximum -50
     
B14 COMPRESSION SET, 22 HRS @ 100 C  
  Original Deflection, % Maximum 25 (Button)
     
EA14 WATER RESISTANCE, 70 HRS @ 100C  
  Durometer Change, Points +/-10
  Volume Change, % +/-15
     
EF11 FUEL A RESISTANCE, 70 HRS @ 23C  
  Durometer Change, Points +/-10
  Tensile Change, % Maximum -25
  Elongation Change, % Maximum -25
  Volume Change, % -5/+10
     
EF21 FUEL B RESISTANCE, 70 HRS @ 23C  
  Durometer Change, Points 0/-30
  Tensile Change, % Maximum -60
  Elongation Change, % Maximum -60
  Volume Change, % Maximum 0/+40
     
EO14 ASTM #1 OIL, 70 HRS @ 100C  
  Durometer Change, Points -5/+10
  Tensile Change, % Maximum -25
  Elongation Change, % Maximum -45
  Volume Change, % -10/+5
     
EO34 ASTM #3 OIL, 70 HRS @ 100C  
  Durometer Change, Points -10/+5
  Tensile Change, % Maximum -45
  Elongation Change, % Maximum -45
  Volume Change, % Maximum 0/+25
     
F17 LOW TEMPERATURE BRITTLENESS ASTM D2137  
  Method A, 9.3.2 Pass
  3 Minutes @ -40 C Non-Brittle

SPECIFICATIONS MET

ASTM D2000-99 Grade M2BG714 B14 EA14 EF11 EF21 EO14 EO34 F17