Aug 15,2024 by DAWN
HNBR or FKM? A Guide to Selecting the Optimal Rubber for Your Industrial Needs
Understanding HNBR (Hydrogenated Nitrile Butadiene Rubber)
Material Composition
HNBR is a highly saturated elastomer which is treated by special hydrogenation.
Properties
HNBR has excellent heat resistance (long-term operation at 150°C), ozone resistance, radiation resistance, and chemical corrosion resistance, while maintaining the oil resistance and wear resistance of NBR.
Applications
HNBR is widely used in the automotive industry (such as O-rings, seals and hoses), the oil and gas industry (such as drilling equipment seals) and various mechanical parts (such as belts, gaskets and seals).
Understanding FKM (Fluoroelastomer)
Material Composition
FKM, commonly known as fluoroelastomer or Viton®, is a synthetic rubber with a high fluorine content.
Properties
FKM has extremely high temperature resistance, chemical corrosion resistance and oxidation resistance
Applications
FKM is widely used in the aerospace industry, chemical processing, petrochemical industry and sealing applications in high temperature environments. It is commonly used to make O-rings, gaskets, valve seals and fuel system components.
Comparing HNBR and FKM: Key Differences
Performance in Extreme Conditions
HNBR has excellent performance in the medium to high temperature range (approximately -40°C to +150°C), especially in high-pressure oil environments. In contrast, FKM has stronger high temperature resistance, can remain stable at temperatures up to 200°C or even higher, and performs well in chemical environments such as strong acid and strong alkali.
Durability and Lifespan
In terms of wear resistance and anti-aging properties, HNBR performs well in dynamic applications and has a long service life. In static applications, FKM tends to have a longer service life due to its excellent resistance to oxidation and chemical corrosion.
Cost Considerations
HNBR is typically more cost-effective than FKM, especially in applications where extreme temperature and chemical resistance are not required. However, for applications involving prolonged exposure to harsh environments, FKM’s long-term durability can lower the total cost of ownership despite its higher upfront cost.
Selecting the Right Material for Your Needs
When you choose the right rubber material, you should consider the following key questions:
What is the temperature range of the application environment? Will the material be exposed to corrosive chemicals? What is the required service life of the material? What is the budget range?
When choosing between HNBR and FKM, it’s essential to consider the specific requirements of your application. If your application involves high temperatures or exposure to aggressive chemicals, FKM may be the better option. Conversely, if your application requires oil resistance, wear resistance, and cost sensitivity, HNBR may be more suitable.
Final Recommendations
Dawn Special elastomer Company is an enterprise that develops, produces, and sells HNBR products with high technology content and high added value, and at the same time extends the processing and production of mixed rubber to downstream. The hydrogenated nitrile rubber plant has a designed capacity of 3,000 tons per year, and the first phase of 1,000 tons was officially produced in 2019.
If you are interested in HNBR, please contact our professional team. We will provide you with customized solutions.