H-NBR Elastomers

Color – green H-NBR Elastomers

H-NBR is an is a hydrogenated acrylonitrile-butadiene rubber commonly known as H-NBR. It has good mechanical properties and good chemical resistance to mineral oils and greases, propane and butane, sulfonated crude oil, water-glycol mixtures and can be used at elevated temperatures.

H-HBR is highly ozone, weathering and aging resistant.

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 H-NBR Elastomers

Good resistance	Average 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 at 20°:	85 +/-2	Shore A	DIN 53505
Density:	1,23	g/cm³	DIN ISO 1183-1
100% Modulus:	>11	N/mm²	DIN 53504
300% Modulus:	/	N/mm²	DIN 53504
Tensile strength:	>17	N/mm²	DIN 53504
Elongation at break:	>170	%	DIN 53504
Rebound resilience:	>35	%	DIN 53512
Tear strength:	>6	N/mm²	DIN ISO 34-1
Abrasion:	<115	mm³	DIN 53516
Compression set:*	<24	%	DIN ISO 815-1
Compression set:**	<26	%	DIN ISO 815-1
Compression set:***	<40	%	DIN ISO 815-1
Min. service temperature:	-25	°C
Max. service temperature (short term):	+150 (+170)	°C

*Compression set @ 23°C, 72 hours, 10% deflexion
**Compression set @ 70°C, 24 hours, 20% deflexion
***Compression set @ 100°C, 24 hours, 20% deflexion

All above established data results from random tests which were taken from the functioning production. All data was stated based on standard test-products in accordance with ISO, DIN and ASTM standards and can substantially not be extended to the completed seal. Our practical technical recommendation, either oral, written or through tests is given in conformity with our best knowledge. However, this data is to be regarded as non-obligatory advice, also taking into consideration any protective rights of a third party, and does not acquit you from making tests with our product in relation to its adaptability for the assigned process and intendment. Utilization, application and processing of the products befall completely outside of our control and are therefore solely your liability. As regards the responsibility, it will be limited to all damages in the value of the product which we delivered and you applied. Certainly, we do assure the immaculate quality of our products in concordance with our general sales and delivery conditions.