HNBR - Hydrogenated nitrile rubber

Clwyd reference HNBR
ASTM classification HNBR
Typical applications
  • Automotive seals and hoses
  • Oil field packers
  • Timing belts
  • Engine grommets
  • 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)
  • 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 Bracket Low
ASTM 1 Oil Excellent
ASTM 2 Oil Excellent
ASTM 3 Oil Excellent
Kerosene Excellent
Liquid B Good
Liquid 101 Excellent
Phosphate ester None
Ketone None
Toluene None
Iso-octane Excellent
Methanol Excellent
Acid (weak) Good
Acid (strong) None
Base (weak) Good
Base (strong) None
Hydrogen sulphide Good
Steam Average
Ozone Good
Radiation Good