Hydrogenated Nitrile Butadiene Rubber (HNBR) is an advanced elastomer derived from Nitrile Butadiene Rubber (NBR) through a catalytic hydrogenation process, which significantly improves its resistance to heat, oxidation, ozone, and chemicals. While maintaining the oil and abrasion resistance of NBR, HNBR exhibits superior performance in harsh environments, making it ideal for automotive, oil and gas applications.
Key Features of HNBR:
- High Thermal Resistance: HNBR can withstand prolonged exposure to temperatures ranging from -40°C to +150°C.
- Chemical Resistance: It resists a variety of chemicals including hydrogen sulfide (H₂S), CO₂, methane, diesel, amine inhibitors, and steam,air conditioning refrigerant, making it highly suitable for the oil &gas industries and automotive.
- Mechanical Properties: It has excellent tensile strength and abrasion resistance.
Applications:
- Automotive: 45% of HNBR usage is for manufacturing transmission belts, 25% for seals, and 13% for cables and hoses.
- Oil & Gas: HNBR is extensively used in deep-well drilling, where extreme conditions require rubber products such as blowout preventers, valve seals, and protective covers to resist degradation caused by high pressure, heat, and aggressive chemical media.
- Sealing Components: Due to its excellent durability, HNBR is also used in O-rings, gaskets, valve seals, pump pistons, and rotating hoses.In comparison to traditional fluororubber seals, which can degrade in extreme oil well conditions, HNBR provides greater resilience and longevity under exposure to challenging media like acids, CO₂, and steam.
Scenarios Favoring the Use of HNBR over FKM(Viton):
HNBR is generally more cost-effective than FKM(Viton), making it an attractive option in situations where extreme heat or aggressive chemicals aren’t present.
Temperature Range: FKM typically withstands higher temperatures (up to 250°C), while HNBR is better for applications below 150°C.
Chemical Resistance: FKM is more chemically resistant, especially against aggressive chemicals, but HNBR can handle oils, fuels, and certain chemicals quite effectively.
Here is some typical performance of HNBR rubber material from OBT:
| Serial | Characteristic | Unit | Test method | Specification | Result |
| 1 | Colour | Black | Black | ||
| 2 | Density | g/cm3 | ISO 2781 | 1.26±0.02 | 1.27 |
| 3 | Hardness | Shore A | ASTM D2240 | 75±5 | 73 |
| 4 | Tensile strength | MPa | ASTM D412 | 15min | 24 |
| 5 | Elongation | % | ASTM D412 | 200min | 243 |
| 6 | Compression set:72h at 150°C | % | ISO 815-1 TypeB | 35max | 22 |
| 7 | TR10 | ℃ | ASTM D746 | -20max | -24 |
Please contact us for your technical requirement on HNBR rubber products(O-Ring, gasket).
Reference Reading:
How to measure the hardness: shore A,B,C,D?
How to measure the density of rubber material?
How to Evaluate the Resistance of Rubber to Oils and Other Solvents？
How to Evaluate the Low-Temperature Performance of Rubber?
How to Evaluate the Resistance of Rubber to Oils and Other Solvents？
How to choose between HNBR and AEM?
How to choose between HNBR and FKM(Viton) for O-Ring/gasket?
How choose Between FKM vs FVMQ?
When to use HNBR and Low Temperature HNBR(LT HNBR)?
Low Temperature FKM Rubber: Ideal for Automotive, Aerospace, and Chemical Processing
