BS2751 Nitrile (NBR) Rubber is a specialised elastomer designed to meet the strict requirements of the BS2751 standard. Known for its exceptional resistance to oils, fuels, and a wide range of chemicals, this material is a top choice for industries requiring reliable and durable sealing solutions. Its versatility and compliance with industry standards make BS2751 Nitrile Rubber a preferred option for critical applications across automotive, aerospace, and industrial sectors.
At Delta Rubber Limited, we offer a range of BS2751 Nitrile (NBR) Rubber grades to suit diverse applications. Whether you need a soft, flexible material or a hard, durable option for high-pressure environments, our BS2751-compliant products ensure consistent quality and performance. This blog explores the properties, grades, and applications of BS2751 Nitrile Rubber to help you find the perfect solution for your project.
What is British Standard BS2751?
BS2751 is a British standard that specifies the quality and performance requirements for Nitrile (NBR) Rubber in industrial applications. It ensures the material offers excellent durability, reliability, and resistance to oils, fuels, and chemicals, making it suitable for demanding environments.
BS2751 Nitrile (NBR) Rubber is categorised into grades such as BA40, BA50, BA60, and BA70, which correspond to different Shore A hardness levels. These grades allow users to select the right material for their specific needs, ranging from softer, more flexible options to harder, more durable variants.
What Are The Different BS2751 Nitrile Rubber Grades?
BS2751 Nitrile (NBR) Rubber is available in four grades: BA40, BA50, BA60, and BA70. Each grade corresponds to a specific Shore A hardness, enabling precise selection based on performance needs.
- BA40: A 40-degree Shore A hardness grade, offering excellent flexibility and low resistance to compression. Ideal for applications where a softer material is required.
- BA50: With a 50-degree Shore A hardness, this medium-soft grade balances flexibility and strength, making it suitable for general-purpose applications.
- BA60: A 60-degree Shore A hardness grade, providing enhanced durability and resistance to wear. Perfect for more demanding environments requiring a tougher material.
- BA70: The hardest option with a 70-degree Shore A hardness, designed for applications needing maximum durability and minimal deformation under load.
These Shore A hardness grades ensure that BS2751 Nitrile (NBR) Rubber meets specific performance requirements, offering reliable solutions across a variety of uses.
What Are The Properties of BS2751 Nitrile Rubber?
BA40 – 40° Shore A
BA40 is the softest grade of BS2751 Nitrile (NBR) Rubber, with a hardness of 40°±5° Shore A. It offers exceptional flexibility and elongation, with an elongation at break of 600%. This grade is suitable for applications requiring low compression resistance and excellent chemical, fuel, oil, and water resistance. It operates effectively in temperatures ranging from -30°C to +90°C.
- Density: 1.14g/cm³
- Tensile Strength: 9.0 MPa minimum
- Compression Set: 30%
BA50 – 50° Shore A
BA50 has a medium-soft hardness of 50°±5° Shore A, providing a balance between flexibility and durability. It delivers reliable resistance to chemicals, fuels, oils, and water, with an elongation at break of 450%. This grade works efficiently across the same temperature range of -30°C to +90°C.
- Density: 1.15g/cm³
- Tensile Strength: 7.7 MPa minimum
- Compression Set: 30%
BA60 – 60° Shore A
With a hardness of 60°±5° Shore A, BA60 offers enhanced toughness and wear resistance, making it suitable for demanding environments. This grade provides strong chemical, fuel, oil, and water resistance and operates within a slightly wider temperature range of -25°C to +120°C.
- Density: 1.40g/cm³
- Tensile Strength: 8.4 MPa minimum
- Elongation at Break: 400%
- Compression Set: 25%
BA70 – 70° Shore A
BA70 is the hardest grade of BS2751 Nitrile (NBR) Rubber, with a hardness of 70°±5° Shore A. It is designed for high-performance applications where durability and minimal deformation under load are critical. It offers excellent resistance to chemicals, fuels, oils, and water and performs well within temperatures of -25°C to +120°C.
- Density: 1.25g/cm³
- Tensile Strength: 12.5 MPa minimum
- Elongation at Break: 250%
- Compression Set: 20%
Each grade of BS2751 Nitrile Rubber provides specific properties tailored to various performance requirements. These materials are compliant with REACH, RoHS, PAH, and CE standards, ensuring quality and reliability for diverse applications.
What is BS2751 Nitrile NBR Rubber Used For?
BS2751 Nitrile (NBR) Rubber is widely used across various industries due to its excellent resistance to oils, fuels, chemicals, and water. Below are some of the key industries that rely on BS2751 Nitrile NBR Rubber:
Automotive Industry
In the automotive sector, BS2751 Nitrile NBR Rubber is essential for components exposed to high wear, oils, and fuels.
- O-Rings & Seals: NBR rubber is used in fuel systems, oil pumps, and engine seals, providing resistance to engine oils, fuels, and high temperatures.
- Gaskets: BS2751 Nitrile rubber is used in gaskets for the automotive engine and transmission systems, ensuring a tight seal and preventing leakage of oils and fluids.
Aerospace Industry
BS2751 Nitrile NBR Rubber is used in the aerospace industry for parts that must withstand extreme conditions, including exposure to fuels and oils.
- Seals & O-Rings: Used in aircraft fuel systems and hydraulic systems where fuel, oils, and chemicals are prevalent. The material’s resistance to extreme temperatures ensures longevity and performance.
- Fuel Tank Linings: BS2751 Nitrile rubber is often used for fuel tank linings due to its superior chemical and fuel resistance properties.
Oil & Gas Industry
The oil and gas industry demands materials that can endure harsh environments and exposure to corrosive substances. BS2751 Nitrile NBR Rubber meets these requirements.
- Seals & Gaskets: Commonly used in drilling and extraction equipment where exposure to oil and gas is constant. It prevents leaks and provides durability under pressure.
- Hose Linings: NBR rubber is used in flexible hoses for transporting oils and gases, offering high resistance to wear and chemical damage.
Industrial Manufacturing
BS2751 Nitrile NBR Rubber is frequently used in industrial applications that involve heavy machinery and exposure to various chemicals.
- Vibration Dampeners: NBR rubber’s flexibility and toughness make it an ideal choice for vibration dampening pads used in machinery to reduce wear and tear.
- Conveyor Belts: BS2751 Nitrile rubber is also used in the manufacturing of conveyor belts where oil, grease, and chemicals are present, ensuring long-term resistance to degradation.
Marine Industry
The marine industry benefits from BS2751 Nitrile NBR Rubber for applications that face exposure to oils, water, and varying weather conditions.
- Boat Seals: Nitrile rubber is used for seals and gaskets in marine equipment and boat engines, providing resistance to fuels and seawater.
- Underwater Components: Components exposed to seawater and oils, such as in offshore drilling platforms, often use BS2751 Nitrile rubber for its resistance to degradation in harsh marine environments.
Where to Buy BS2751 Nitrile NBR Rubber
If you’re looking to buy BS2751 Nitrile NBR Rubber, look no further than Delta Rubber Limited. We stock and supply all the above grades of BS2751 Nitrile NBR Rubber in rubber sheet form. Our sheets are available in a standard width of 1400mm and can be supplied in lengths ranging from 1m to 10m, with a range of thicknesses available from 1mm to 6mm (more thicknesses available upon request). You can conveniently purchase online through our online shop with fast and reliable delivery.
In addition to our stock of rubber sheets, we also offer bespoke Nitrile BS2751 components tailored to your specific requirements. Whether you need gaskets, washers, seals, or other custom rubber components, we can produce them to your exact specifications. Contact us today with your enquiry, and our team will be happy to assist you in providing the perfect solution for your needs.