Nitrile Rubber (NBR)

- Sep 01, 2017-

General Information
ASTM D2000
SAE J 200 Codes BF, BG, BK, CH
Relative Cost Low

-40°~100°C Special Compound -55°~125°C
-40°~212°F Special Compound -67°~275°F

Primary Uses

  • Oil resistant applications

  • Low temperature applications

  • Fuel systems, automotive, marine, and aircraft

  • General industrial use

Performs Well in… 

  • Petroleum based oils and fuels

  • Aliphatic hydrocarbons

  • Vegetable oils

  • Silicone oils and greases

  • Ethylene glycol

  • Dilute acids

  • Water below 100°C (212°F)

Doesn’t Perform Well in…

  • Aromatic hydrocarbons

  • Chlorinated hydrocarbons

  • Automotive brake fluid

  • Ketones

  • Ethers

  • Esters

  • Phosphate ester hydraulic fluids

  • Strong acids

Nitrile is the most widely used elastomer in the seal industry. The popularity of nitrile is due to its excellent resistance to petroleum products and its ability to be compounded for service over a temperature range of -55°C to 125°C (-67°F to
Nitrile is a copolymer of butadiene and acrylonitrile. Variation in the content of acrylonitrile 18% to 50%) is possible to accommodate specific requirements. An increase in acrylonitrile content increases resistance to heat plus petroleum base oils and fuels but decreases low temperature flexibility. Military AN and MS O-ring specifications require nitrile compounds with low acrylonitrile content to insure
low temperature performance.
Nitrile provides excellent compression set, tear, and abrasion resistance. The major limiting properties of nitrile are its poor ozone and weather resistance and moderate heat resistance.

Application Advantages

  • Excellent compression set

  • Superior tear resistance

  • Abrasion resistance


  • Poor resistance to ozone, sunlight, and weather

  • Moderate heat resistance

Specialized Applications

  • NBR NSF standard 61 for potable water applications

  • NBR WRc, KTW water applications

  • NBR FDA white list compounds

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