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Резина FKM

Color - black

H-NBR is an elastomer based on hydrogenated acrylonitrile-butadiene rubber, which can be used in aliphatic hydrocarbon (i.e. propane, butane) and mineral oils and lubricants (short time up to 170°C), also for raw petroleum which contains hydrogen sulfide. H-NBR also can be used in diluted acids and alkali, saline, even at high temperatures and in water-glycol composition. H-NBR is not compatible with fuels, which are high in aromatic hydrocarbons (composition of premium gasoline), petrol ketones (fuel- spirituous compositions), esters, ethers and chlorinated hydrocarbons (i.e. trichloroethylene and tetrachlorethylene).

H-NBR is soot free and is suitable for electrical insulation

In comparison with NBR, H-NBR has better mechanical properties, such as conventional tensile strength, relative elongation at break and abrasion resistance. The temperature range is much wider (from -25°C up to +150°C; short time up to 170°C). This material has a high ozone, weather and ageing resistance. Swelling in mineral oils is low, but depends very much on the composition of the oil. The compatibility with oils, which have a high percentage of additives, is much better than NBR.

Resistance

Resistance

Good resistance Medium resistance Low resistance
Mineral oils and grease 40% aromat. fuils (leaded fuils) Aromatic hydrocarbon (toulene, benzol)
Aliphatic hydrocarbons (propane, butane, petrol) Biodegradable hydraulic fluids Chlorinated hydrocarbones (trichloroethylene; perchlorethylene)
Water Silicone oil and grease (oils can cause the decrease) Brake fluids based on glycol
Fire-resistant pneumatic fluids HFA, HFB, HFC Fire-resistant hydraulic fluids HFD
Adipose and vegetable oils and grease Polar solvents (acetone, ethyl acetate)
Diesel petrol Hot steam
Oils with big amount of additives
Big amount of acids and bases, salines at room temperature.
Raw petroleum (containing hydrogen sulfide and amines)

Application

H-NBR is mainly used in cases, wh ere high fuel and mineral oil resistance, high elasticity at high temperatures in oil with a high percentage of additives, are required. (I.e. FPM substitute).

For example: motor seals and gearbox seals in automotive industry; seal parts for petroleum and natural gas production industry.

Main use

  • Rotary seals, seals for automotive technologies
  • O-rings

H-NBR Material Data Sheet

Properties Value Unit Standard
Hardness 83 Sh A DIN 53505
Density 1,23 g/cm³ DIN 53479 or DIN EN ISO 1183-1
Compression set 23°C / 72 h 23,7 % DIN 53517 or DIN ISO 815-1
Compression set 70°C / 24 h 25,6 % DIN 53517 or DIN ISO 815-1
Compression set 100°C / 24 h 40 % DIN 53517 or DIN ISO 815-1
100 % modulus 9,7 MPa DIN 53504
Rebound resilience 36 % DIN 53512
Tensile strength 23 MPa DIN 53504
Elongation at break 256 % DIN 53504
Tear strength 5,6 N/mm DIN 53515 or DIN ISO 34-1 A
Abrasion 112 mm³ DIN 53516
Min. service temperature -25 °C
Max. service temperature +150 °C