NBR
Nitrile butadiene rubber
NBR is an acrylonitrile and butadiene-based rubber.
The material has good mechanical properties and greater abrasion resistance than most other elastomers.
Due to its excellent resistance to mineral oils, oil and water emulsions and many fuel types, NBR used to be the standard material for O-rings and dynamic seals.
The material has good mechanical properties and greater abrasion resistance than most other elastomers.
Due to its excellent resistance to mineral oils, oil and water emulsions and many fuel types, NBR used to be the standard material for O-rings and dynamic seals.
| Short designation | NBR |
| Brand name | Perbunan® Buna N® |
| Chemical description | Nitrile butadiene rubber |
| Mechanical properties | |
| Hardness range [Shore A/D] | 40 – 90 |
| Wear resistance | Good – very good |
| Tensile strength [MPa] | 10 – 25 |
| Physical properties | |
| Density [g/cm³] | 1.4 |
| Application temperatures | |
| Temperature range, short-term [°C] | -40 – 120 |
| Temperature range, continuous [°C] | -30 – 100 |
| Other properties | |
| Flammability according to UL 94 | Burns (still HB) |
| Chemical resistance | |
| Mineral grease and oils | ++ |
| Petrol | ++ |
| Weak/strong acids | o/-- |
| Weak/strong alkalis | +/- |
| Perchloroethylene | - |
| Trichloroethylene | -- |
| Acetone | -- |
| Alcohols | + |
| Brake fluid | - |
| Hydrolysis resistance (hot water) | + |
| Weather/UV radiation | o |
++ very good / + good / o satisfactory / - moderate (significant change to properties) / -- unsuitable
This information is for reference only; we do not assume any liability for its accuracy. The properties of elastomer materials are highly dependent on their specific composition and their additives.