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HNBR - Hydrogenated nitrile rubber

Clwyd referenceHNBR
ASTM classificationHNBR
Typical applications
  • Automotive seals and hoses
  • Oil field packers
  • Timing belts
  • Engine grommets
Advantages
  • Superior to basic NBR
  • Excellent physical strength and retention of properties after long-term exposure to heat, oil and chemicals
  • Good ozone and water resistance
  • Can be compounded to allow broad temperature range (from -30°C to 160°C)
Disadvantages
  • Low tensile properties
  • Not recommended for use with ketones, esters/ethers and aromatic fuels
Available hardness range (Shore A)50 - 99
Upper continuous service temp.175°C
Min. temp. for sealing applications-25°C
Minimum non-brittle  temp. -40°C
Tensile strength (up to)30 MPa
Elongation at break (up to)450%
Price BracketLow
ASTM 1 OilExcellent
ASTM 2 OilExcellent
ASTM 3 OilExcellent
KeroseneExcellent
Liquid BGood
Liquid 101Excellent
Phosphate esterNone
KetoneNone
TolueneNone
Iso-octaneExcellent
MethanolExcellent
Acid (weak)Good
Acid (strong)None
Base (weak)Good
Base (strong)None
Hydrogen sulphideGood
SteamAverage
OzoneGood
RadiationGood

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