HNBR strengthens NBR further, mainly in terms of temperature and ozone resistance.

We supply HNBR Gaskets, HNBR O-ring and HNBR Cords to leading oil fields in China.

Our HNBR Product

Material DataSheet of HNBR

Abbreviation: HNBR
ASTM D-2000 Classification: DH
Chemical Definition: Hydrogenated Acrylonitrile Butadiene
RRP Compound Number Category: 30000 Series

Durometer or Hardness Range30 – 95 Shore A
Tensile Strength Range1,500 – 3,500 PSI
Elongation (Range %)90 % – 550 %
Abrasion ResistanceGood to Excellent
Adhesion to MetalExcellent
Adhesion to Rigid MaterialsGood to Excellent
Compression SetGood to Excellent
Flex Cracking ResistanceFair to Good
Impact ResistanceExcellent
Resilience / ReboundGood
Tear ResistanceGood to Excellent
Vibration DampeningFair to Good
Acids, DiluteGood
Acids, ConcentratedFair to Good
Acids, Organic (Dilute)Good
Acids, Organic (Concentrated)Fair to Good
Acids, InorganicFair to Good
Alcohol’sGood to Excellent
AldehydesFair to Good
Alkalies, DiluteGood
Alkalies, ConcentratedPoor to Good
Animal & Vegetable OilsGood to Excellent
Brake Fluids, Non-Petroleum BasedFair
Diester OilsGood
Esters, Alkyl PhosphatePoor
Esters, Aryl PhosphatePoor to Fair
EthersPoor to Fair
Fuel, Aliphatic HydrocarbonExcellent
Fuel, Aromatic HydrocarbonFair to Good
Fuel, Extended (Oxygenated)Good to Excellent
Halogenated SolventsPoor to Fair
Hydrocarbon, HalogenatedPoor
Lacquer SolventsFair
LP Gases & Fuel OilsExcellent
Mineral OilsGood to Excellent
Oil ResistanceGood to Excellent
Petroleum AromaticGood to Excellent
Petroleum Non-AromaticGood to Excellent
Refrigerant AmmoniaGood
Refrigerant HalofluorocarbonsR-11, R-12, R-13
Refrigerant Halofluorocarbons w/ OilR-11, R-12
Silicone OilGood to Excellent
Solvent ResistancePoor
Low Temperature Range- 70º F to -30º F
Minimum for Continuous Use (Static)- 40º F
Brittle Point- 70º F to -30° F
High Temperature Range+ 250º F to + 300º F
Maximum for Continuous Use (Static)+ 325º F
Flame ResistancePoor
Gas PermeabilityFair to Excellent
Ozone ResistanceGood to Excellent
Oxidation ResistanceExcellent
Radiation ResistanceFair to Good
Steam ResistanceFair to Good
Sunlight ResistanceGood to Excellent
Taste RetentionFair to Good
Weather ResistanceGood to Excellent
Water ResistanceExcellent

More About HNBR

HNBR is a hydrogenated version of NBR (nitrile) rubber, a copolymer of ACN and 1,3-butadiene. It has better performance than NBR, as in the case of HNBR, the NBR is hydrogenated in a catalytic hydrogenation process.

HNBR is widely known for its physical strength and retention of properties after long-term exposure to heat, oil, and chemicals. Depending on filler selection and loading, HNBR compounds typically have tensile strengths of 20 – 31 MPa when measured at 23 °C.

Compounding techniques allow for HNBR to be used over a broad temperature range, -40 °C to 150 °C, and 160 °C in oil, with minimal degradation over long periods of time. For low-temperature performance, low ACN grades should be used; high-temperature performance can be obtained by using highly saturated HNBR grades with white fillers.

As a group, HNBR elastomers have excellent resistance to common automotive fluids (e.g., engine oil, coolant, fuel, etc.) and many industrial chemicals. Like NBR, fluid and chemical resistance improves as the ACN content is increased.