Heat and fluid resistance
Hydrogenation reduces the remaining double bonds in nitrile rubber, supporting higher-temperature service and improved resistance to heat ageing when compared with standard NBR.
HNBR compound
Industrial hydrogenated nitrile rubber
A technical reference for Hamta Polymer HNBR compounds from 50 to 90 Shore A. HNBR is considered when an application needs the oil resistance associated with nitrile rubber together with stronger heat, abrasion and sour-gas performance. Final selection must be confirmed for the finished-part service conditions.
-40 to +160 C
Typical service temperature
5
Standard hardness grades
ASTM / ISO
Test references
50-90 Shore A
Hardness range
Dynamic sealing focus
The abrasion and compression-set profile makes HNBR a material family to assess for demanding seals, bearing elements and other dynamic industrial parts.
Application confirmation required
Fluid chemistry, H2S concentration, pressure, motion, temperature cycle and cure system all affect suitability. A material code is not a final approval.
Hamta Polymer HNBR general specifications
Chemical nameHydrogenated acrylonitrile-butadiene rubber
Standard designationHNBR (ASTM D1418)
Available hardness range50 to 90 Shore A
Typical continuous service range-40 to +150 C; short peak conditions may differ by compound
Reference test standardsASTM and ISO methods stated in the datasheet
ColourBlack; other colours subject to agreement
Specific gravity1.20 to 1.28 g/cm3, depending on formulation and hardness
Technical datasheet
HNBR datasheet by hardness
Choose a hardness grade to view the recorded mechanical properties, units and test references.
| Property | Symbol | Unit | Value | Standard |
|---|---|---|---|---|
| Hardness | H | Shore A | 80 +/- 5 | ASTM D2240 / ISO 7619 |
| Tensile strength | TS | MPa | >= 21.0 | ASTM D412 / ISO 37 |
| Elongation at break | EB | % | >= 200 | ASTM D412 / ISO 37 |
| 100% modulus | M100 | MPa | 5.0-10.0 | ASTM D412 / ISO 37 |
| Tear resistance | TR | kN/m | >= 44 | ASTM D624 / ISO 34 |
| Compression set (150 C / 24 h) | CS | % | 14-25 | ASTM D395-B / ISO 815 |
| Resilience | R | % | 40-50 | ISO 4662 |
| Specific gravity | rho | g/cm3 | 1.26 +/- 0.03 | ASTM D792 / ISO 2781 |
| Abrasion resistance | Abr | mm3 | <= 50 | ISO 4649 |
| Oil volume change (IRM 903, 150 C / 70 h) | AV | % | <= 6.0 | ISO 1817 |
| Typical service temperature | T | C | -35 to +160 | - |
HNBR chemical-resistance guidance
This is an orientation aid, not a final compatibility approval. Confirm the specific medium, concentration, temperature and exposure cycle with the technical team.
Petroleum oils and hydraulic fluids
Mineral oils and petroleum-based hydraulic fluidsExcellent
Lubricating oils and greasesExcellent
Oil and gas environments
Hydrocarbon fluids under assessed service conditionsGood
Hydrogen sulfide (H2S) environments subject to application reviewGood
Water and weather exposure
Water and aqueous media within the reviewed temperature rangeFair
Ozone and weathering exposureGood
Aggressive solvents
Polar solvents, ketones and estersPoor
Strong oxidising acids and chlorinated solventsPoor
Excellent
Good
Fair
Poor
Technical notes and limitations
1
Values are typical laboratory guidance for the stated test methods. Finished-part results can vary with formulation, cure, geometry and production conditions.
2
HNBR is produced by hydrogenating NBR. The resulting material family is commonly selected for stronger heat-ageing and chemical-resistance requirements than standard nitrile rubber.
3
For dynamic sealing, validate compression set, extrusion risk, mating surface, lubrication and temperature cycle on the actual assembly.
4
For service above the stated range or aggressive fluids, review alternatives such as FKM with the technical team before making a material decision.
Where is HNBR considered in our product range?
These product families can be explored from the English product hub. Suitability is determined by the final application, not by the material code alone.
Need help selecting an HNBR grade?
Share the medium, temperature range, pressure, motion, dimensions and target quantity with Hamta Polymer for an application-specific discussion.