NITRILE

Nitrile, also known as Buna-N, acrylonitrile butadiene rubber, and NBR, is a synthetic rubber copolymer of acrylonitrile (ACN) and butadiene. The physical and chemical properties vary depending on the polymer’s composition. This form of synthetic rubber is generally resistant to oil, fuel, and other chemicals. Typically used in the automotive and aeronautical industry to generate fuel and oil handling hoses, seals, gaskets and grommets. It has the ability to tolerate a range of temperatures from 40° to 226 °F makes it an ideal material for operations requiring a variety of temperatures. Nitrile rubber is normally resistant to aliphatic hydrocarbons. Nitrile, like natural rubber, can be attacked by ozone, ketones, esters and aldehydes.

 

PROPERTIES

Common Name: Nitrile, Buna-N, NBR
Chemical Name: Acrylonitrile-butadiene
Generally Resistant to: Gases, Aliphatic Hydrocarbon, Oils and Fuels
Generally Attacked by: Ketones, Ozone, Sunlight, Aromatic Oil, Flame, Weather
ASTM D 2000 / SAE J200 Classification: BF, BG, BK, CH
MIL-R-3065 / SAE J-14 / MIL-STD-417 Classification: SB
ASTM D-1418 Designation: NBR

 

PHYSICAL PROPERTIES

Elongation: 400% to 600%
Hardness Range (Durometer Shore A): 35 to 90

 

MECHANICAL PROPERTIES

Compression Set: Good
Rebound Rating: Good
Flex Cracking Resistance: Good
Abrasion Resistance: Good to Excellent
Tear Resistance: Good
Impact Resistance: Fair to Good
Flame Resistance: Poor

 

THERMAL PROPERTIES

Minimum Service Temperature: -30°F to -70°F
Maximum Service Temperature: +220°F to +280°F

 

TYPES OF NITRILE

COMMERCIAL NITRILE (BUNA–N)

A smooth finish blended Nitrile sheet, which is offered in a range of five durometers: 40 (untrimmed) thru 80 durometer (trimmed), to perform in a wide variety of applications. Designed to meet ASTM specifications for 1BF material. This material can handle a temperature range from -20°F to +170°F.

Specificiations:
Durometer
Hardness
(Shore A ± 5)Thickness
(inches)Tensile (psi)Ultimate
Elongation (%)Estimated Weight
Per Linear Foot
(1/8″ x 36″)SpecificationsMinimumMinimum401/16 – 18003502.5 lbASTM D 2000 1BF 408 Z1,
SAE J200 1BF 408 Z1
(Z1 = Meets basic requirements for BF materials.
Physical properties are as listed.)
501/16 – 18003002.6 lbASTM D 2000 1BF 508 Z1,
SAE J200 1BF 508 Z1
(Z1 = Meets basic requirements for BF materials.
Physical properties are as listed.)
601/16 – 19002002.7 lbASTM D 2000 1BF 609,
SAE J200 1BF 609701/16 – 110002002.7 lbASTM D 2000 1BF 710,
SAE J200 1BF 710701/16 – 110001002.8 lbASTM D 2000 1BF 810,
SAE J200 1BF 810

 

PREMIUM NITRILE (BUNA–N)

This Premium Grade Nitrile is formulated to give maximum oil resistance and longer service life in demanding applications. Able to withstand a temperatures range of -30°F to +220°F this material comes untrimmed with a smooth blended finish.

Specificiations:
Durometer
Hardness
(Shore A ± 5)Thickness
(inches)Tensile (psi)Ultimate
Elongation (%)Estimated Weight
Per Linear Foot
(1/8″ x 36″)SpecificationsMinimumTypicalMinimumTypical401/64 – 1/4100010504505002.22 lbASTM D 2000
M1BG 407501/64 – 1/4100014003504002.32 lbASTM D 2000
M1BG 507601/64 – 1/2145015003003002.36 lbASTM D 2000
M1BG 610701/64 – 1/2145015002502502.48 lbASTM D 2000
M1BG 710801/64 – 1/4145015001251502.59 lbASTM D 2000
M1BG 810901/32 – 1/4*145020001001002.34 lbASTM D 2000
M1BG 910

 

FDA NITRILE (BUNA–N)

A sheet specially formulated for its whiteness, used in food, phamaceutical, and cosmetic processing. Made from FDA-approved ingredients per 21CFR 177.2600, it is non-marking, non-allergenic, and safe to use for repeated food exposure. It has good oil and abrasion resistance and handles oily and greasy food products well. This product conforms with 3-A Sanitary 18-03 requirements for multiple use rubber Class III and Class IV. This material is white in color and comes trimmed with a blended smooth finish. Able to withstand a temperature range of -25°F to +180°F.

Specificiations:

Durometer
Hardness
(Shore A ± 5)
Thickness
(inches)
Tensile (psi)Ultimate
Elongation (%)
Estimated Weight
Per Linear Foot
(1/8″ x 36″)
Specifications
MinimumMinimum
601/16 – 1/410003502.8 lbASTM D 2000 1BG 610,
FDA-approved ingredients
per 21CFR 177.2600

 

TRANSFORMER OIL NITRILE (BUNA–N)

Designed specifically for the transformer oil market to help dissipate the likelihood of high electrostatic charging. Meets the ASTM D 2000 standards and industry specification GE A12C11E7. This material is black in color and untrimmed with a blended smooth finish.

Specifications:

Durometer
Hardness
(Shore A ± 5)
Thickness
(inches)
Tensile (psi)Ultimate
Elongation (%)
Temperature
Range
Estimated Weight
Per Linear Foot
(1/8″ x 36″)
Specifications
MinimumTypicalMinimumTypical
601/32 – 1/220002100300500-30°F to +250°F2.36 lbASTM D 2000
5BG 620 A14 B14 EO34,
General Electric
A12C11E7
701/32 – 1/220002200250350-20°F to +250°F2.42 lbASTM D 2000
5BG 720 A14 B14 EO34,
General Electric
A12C11E7

 

BIO–DIESEL NITRILE (BUNA–N)

This material is designed for environmental use where alternative fuels are present. This Nitrile can withstand temperatures ranging from -30°F to +220°F. Bio-Diesel Nitrile comes in two grades, B20 (20% Bio-Diesel and 80% Petroleum Diesel) and B100 (100% Bio-Diesel). This material is black in color and comes untrimmed with a smooth blended finish.

Specifications:

Durometer
Hardness
(Shore A ± 5)
Thickness
(inches)
Tensile (psi)Ultimate
Elongation (%)
Estimated Weight
Per Linear Foot
(1/8″ x 36″)
Features
MinimumTypicalMinimumTypical
601/32 – 1/2150015003003002.39 lbCompatible with
Bio-Diesel B20 & B100
701/32 – 1/2150018002502502.4 lbCompatible with
Bio-Diesel B20 & B100

 

STORAGE RECOMMENDATIONS

  • Store in a cool, dry place with temperature below 75°F.
  • Keep away from direct heat or open flames.
  • Avoid contact with solvents or other fluids.
  • Do not store in direct sunlight.
  • Keep products wrapped or sealed to minimize the absorption of moisture.
  • Store in a relaxed condition free from tension, compression or other deformation.

 

APPLICATIONS

  • Carburetor and fuel pump diaphragms
  • Aircraft hoses
  • Oil seals
  • Oil-lined tubing
  • Gaskets