RUBBER ELASTOMERS

H-NBR

H-NBR SEALING MATERIALS

H-NBR – HIGH-PERFORMANCE ELASTOMER FOR DEMANDING SEALING APPLICATIONS

H-NBR (Hydrogenated Nitrile Butadiene Rubber) is an advanced modification of NBR, designed for operation under elevated temperatures, aggressive environments, and demanding sealing requirements. Due to the hydrogenation process in its polymer structure, H-NBR provides significantly improved thermal and chemical resistance while maintaining strength and elasticity, even under the harshest operating conditions.

KEY ADVANTAGES OF H-NBR

EXTENDED OPERATING TEMPERATURE RANGE

Retains elasticity and strength from –40 °C to +150 °C (short-term up to +160 °C), significantly outperforming standard NBR rubber.

EXCELLENT CHEMICAL RESISTANCE

Outstanding resistance to oils, fuels, sour gases, amines, acids, and aggressive industrial fluids ensures long-lasting sealing performance.

OZONE AND WEATHER RESISTANCE

Unlike conventional NBR, hydrogenated NBR is highly resistant to ozone, UV exposure, and weathering, making it suitable for outdoor and offshore applications.

MECHANICAL STRENGTH

High tensile strength, abrasion resistance, and low compression set provide durability and reliable sealing in both static and dynamic applications.

EXTRUSION AND PRESSURE RESISTANCE

Performs exceptionally well under high pressure and allows for the use of larger sealing gaps.

Applications

H-NBR is widely used where conventional elastomers (such as NBR or EPDM) fail to meet requirements:
Good resistance
Mineral oils and grease
Aliphatic hydrocarbons (propane, butane, petrol)
Water
Fire-resistant pneumatic fluids HFA, HFB, HFC
Adipose and vegetable oils and grease
Diesel petrol
Oils with big amount of additives
Big amount of acids and bases, salines at room temperature
Raw petroleum (containing hydrogen sulfide and amines)
Average resistance
40% aromat. fuils (leaded fuils)
Biodegradable hydraulic fluid
Silicone oil and grease (oils can cause the decrease)
Low resistance
Aromatic hydrocarbon (toulene, benzol)
Chlorinated hydrocarbones (trichloroethylene; perchlorethylene)
Brake fluids based on glycol
Fire-resistant pneumatic fluids HFD
Polar solvents (acetone, ethyl acetate)
Hot steam
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% deflexio

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.

TEST ALPANA QUALITY

We take pride in our seal-making raw materials and are ready to offer samples of our semi-finished products. For testing, we provide our most popular materials, including the Max series of polyurethanes: H-Pur, SH-Pur, XSH-Pur, XH-Pur—as well as rubber bushings: NBR, FKM, H-NBR, EPDM, and MVQ!

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