Nitrile (Buna-N) Polymer:
Properties, Characteristics and Resistances
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General Information
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 to +280°F
Environmental Resistance
Recommended Shelf Life:
5 to 10 years
Weather Resistance:
Poor
Sunlight Resistance:
Poor
Ozone Resistance:
Poor
Oxidization Resistance:
Good
Water Resistance:
Good to Excellent
Steam Resistance:
Fair
Gas Permeability:
Fair to Good
Radiation Resistance:
Good, 1 x 105 Ga Gy
Fair, 6 x 105 Ga Gy
Chemical Resistance
Acetone:
NOT RECOMMENDED
Amonium Hydroxide:
NOT RECOMMENDED
Animal Fats:
RECOMMENDED: Little or Minor Effect
Carbon Dioxide:
RECOMMENDED: Little or Minor Effect
Chlorine:
DRY:
- - -
WET:
- - -
Fluorine (Liquid):
- - -
Fuel Oil:
RECOMMENDED: Little or Minor Effect
Gasoline:
RECOMMENDED: Little or Minor Effect
Hydrochloric Acid 37%:
HOT:
NOT RECOMMENDED
COLD:
Minor to Moderate Effect
Hydrochloric Acid Concentrate 37%:
HOT:
NOT RECOMMENDED
COLD:
NOT RECOMMENDED
Kerosene:
RECOMMENDED: Little or Minor Effect
Methyl Ethyl Ketone:
NOT RECOMMENDED
Mineral Oil:
RECOMMENDED: Little or Minor Effect
Naptha:
Moderate to Severe Effect
Natural Gas:
RECOMMENDED: Little or Minor Effect
Nitric Acid:
Concentrate:
NOT RECOMMENDED
Dillute:
NOT RECOMMENDED
Red Fuming:
NOT RECOMMENDED
Petroleum:
Below 250:
RECOMMENDED: Little or Minor Effect
Above 250:
Moderate to Severe Effect
Phosphoric Acid:
20%:
Minor to Moderate Effect
45%:
NOT RECOMMENDED
Propane:
RECOMMENDED: Little or Minor Effect
Salt Water:
RECOMMENDED: Little or Minor Effect
Skydrol:
Skydrol 500:
NOT RECOMMENDED
Skydrol 7000:
NOT RECOMMENDED
Sodium Hydroxide:
Minor to Moderate Effect
Sulfuric Acid:
Concentrate:
NOT RECOMMENDED
Dillute:
NOT RECOMMENDED
20% Oleum:
NOT RECOMMENDED
Toluene:
NOT RECOMMENDED
Transformer Oil:
RECOMMENDED: Little or Minor Effect
Vegetable Oils:
RECOMMENDED: Little or Minor Effect
Vinegar:
Minor to Moderate Effect
Recommended Storage Conditions
- Actual shelf life could vary dramatically based on storage conditions
- 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
Please note that information presented here is general to Nitrile polymer. The properties and characteristics of manufactured rubber products may vary based on polymer type and formulation. Our rubber products are a proprietary blend of various polymers formulated to meet stated physicals and specifications. The named product polymer is not necessarily the primary polymer representing the highest percentage of the polymer blend. Determination of the suitability of the goods for the uses and applications contemplated by Buyer and others shall be the sole responsibility of the Buyer or user. No guaranty is given with respect to length of service on any particular application. Suggestions or recommendations made by Seller in its product literature concerning uses or applications of the goods are believed to be reliable, but Seller makes no warranty or guaranty of results to be obtained since the conditions of the use and application by Buyer and others are beyond Seller’s control.
View complete Terms & conditions of Sale for suitability of use and formulations
Data presented here was gathered from several sources including Uniroyal Chemical Company, Inc., The Los Angeles Rubber Group, Inc., and Compass Publications.
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