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Aflas® vs Buna-N (NBR) for O-Rings and Seals

Aflas® (TFE/P, FEPM)

Buna-N (NBR, Nitrile, Buna)

Description
 Both materials are well suited for use in the -10 to 125°C range. Buna-N has an advantage in lower temperatures and Aflas® has an advantage in higher temperatures. Marco offers specific compound formulations extending these ranges even futher as can be seen in the following compound comparison chart. When comparing these materials with respect to electrical current resistance, Aflas® has a slight advantage. The differences in compression set resistence show that Buna-N has a slight advantage. Additionally, Buna-N has a slight advantage when considering wear resistance. Also, Aflas® has a slight advantage when comparing heat stability. Furthermore, Buna-N has a slight advantage when comparing short term resilience. Finally, Aflas® has a slight advantage when evaluating differences in permeation resilience. Both materials are resistant to solvents, petroleum oils and di-ester lubricants, with Aflas® having specific resistences to bases, steam, ozone, hot amines, highly reactive organic chemicals, highly reactive inorganic chemicals, Hydrogen Sulfide (H2S), gamma-ray radiation, strong acids, brake fluids, acetone, amines, ammonia, halogenated hydrocarbons, vacuum, low molecular weight esters, low molecular weight ethers, skydrol fluids, most acids and steam <400ºF. Buna-N has specific resistence to acids, common fuels, mineral oils, vegetable oils, greases, aliphatic hydrocarbons, diluted alkalies, silicone oils, hydraulic fluids, water, ethylene glycol fluids and alcohols.
Compounds
Marco
Compound
Number		DatasheetHardness
(Shore A)		ColorLow TempHigh TempFeatures
Compound: B1000Datasheet: View DatasheetHardness: 70Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: Lowest cost highest inventory general purpose commodity NBR compound. Compare to Parker N1470-70 and N0674-70 and Parco 4200-70 and 4900-70. Available in nearly any color and hardness.
Compound: B1001Datasheet: View DatasheetHardness: 90Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: General purpose, higher pressure applications. Compare to Parker N0552-90 and N1490-90 and Parco 4200-90 and 4900-90.
Compound: B1002Datasheet: View DatasheetHardness: 70Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: FDA compliant per 21 CFR 177.2600. Compare to Parker N0508-75 and N1069-70.
Compound: B1005Datasheet: View DatasheetHardness: 90Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: FDA compliant, higher hardness.
Compound: B1006Datasheet: View DatasheetHardness: 50Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: General purpose, lower hardness for lower closure force applications. FDA compliant and alternative colors available. Compare to Parker N0299-50.
Compound: B1010Datasheet: View DatasheetHardness: 80Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
225 °F
(110 °C)
Description: General purpose, higher hardness. Compare to Parker N0368-80.
Compound: B1011Datasheet: View DatasheetHardness: 70Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: Internally lubricated with PTFE to reduce friction. Silicone oil and Moly (MOS2) internal lubricants available. Alternative hardness and colors also available.
Compound: B1017Datasheet: View DatasheetHardness: 70Color: BlackLow Temp:
-35 °F
(-40 °C)
High Temp:
250 °F
(125 °C)
Description: UL 157 listed for several approved uses.
Compound: B1039Datasheet: View DatasheetHardness: 70Color: WhiteLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description:
Compound: B1058Datasheet: View DatasheetHardness: 70Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: NSF 61 certified for drinking water applications.
Compound: B1063Datasheet: View DatasheetHardness: 95Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: Very high hardness for extreme pressure applications.
Compound: B1083Datasheet: View DatasheetHardness: 70Color: BlackLow Temp:
-65 °F
(-55 °C)
High Temp:
275 °F
(135 °C)
Description: Improved lower and higher temperature resistance and improved oil resistance at higher temperature. Compare to Parker N0794-75 and M83461 and Parco 4367-70.
Compound: B1105Datasheet: View DatasheetHardness: 70Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: Metal detectable for contamination detection sensors. FDA compliant per 21 CFR 177.2600. Formulated for food contact and life science applications. Additional colors available.
Compound: B1115Datasheet: View DatasheetHardness: 70Color: BlueLow Temp:
-40 °F
(-40 °C)
High Temp:
250 °F
(125 °C)
Description:
Compound: B1122Datasheet: View DatasheetHardness: 70Color: BlackLow Temp:
-30 °F
(-35 °C)
High Temp:
250 °F
(125 °C)
Description: NSF 51 certified for food contact.
Compound: M1000Datasheet: View DatasheetHardness: 70Color: BlackLow Temp:
-65 °F
(-55 °C)
High Temp:
275 °F
(135 °C)
Description: Mil Spec (Military specification) AMS-P-25732, MS28775-### per MIL-P-25732C-(1).
Compound: M1001Datasheet: View DatasheetHardness: 75Color: BlackLow Temp:
-65 °F
(-55 °C)
High Temp:
275 °F
(135 °C)
Description: Mil Spec (Military specification) AMS-P-83461, M83461/1-### per MIL-P-83461B#3. Improved low temperature resistance and hydraulic fluid resistance.
Compound: M1002Datasheet: View DatasheetHardness: 65Color: BlackLow Temp:
-65 °F
(-55 °C)
High Temp:
250 °F
(125 °C)
Description: Mil Spec (Military specification) MS29513-###, MS29512-##, AMS-P-5315B.
Compound: M1004Datasheet: View DatasheetHardness: 90Color: BlackLow Temp:
-65 °F
(-55 °C)
High Temp:
275 °F
(135 °C)
Description: Mil Spec (Military specification) MS28778, AMS-P-5510C.
Compound: M1005Datasheet: View DatasheetHardness: 65Color: BlackLow Temp:
-70 °F
(-60 °C)
High Temp:
200 °F
(95 °C)
Description: Mil Spec (Military specification) AMS7271, AS3578.
Compound: L1000Datasheet: View DatasheetHardness: 80Color: BlackLow Temp:
15 °F
(-10 °C)
High Temp:
450 °F
(235 °C)
Description: General purpose Aflas ®, steam resistant, sour gas resistant, acid resistance, for chemical and oil industries  (higher performance Alfas® versions avaialble for oil drilling environments)
Compound: L1003Datasheet: View DatasheetHardness: 90Color: BlackLow Temp:
15 °F
(-10 °C)
High Temp:
450 °F
(235 °C)
Description: General purpose Aflas® with a higher durometer. Steam resistant, sour gas resistant, acid resistance, for chemical and oil industries. Good for high pressure applications
Compound: L1009Datasheet: View DatasheetHardness: 90Color: BlackLow Temp:
30 °F
(0 °C)
High Temp:
475 °F
(250 °C)
Description: Higher performance and higher durometer Aflas®, improved explosive decompression resistance, steam resistance, sour gas resistance, acid resistance, tested to Norsok M-710 for oilfield
Compound: L1011Datasheet: View DatasheetHardness: 80Color: BlackLow Temp:
15 °F
(-10 °C)
High Temp:
450 °F
(235 °C)
Description: FDA/USP class VI compliant Aflas® material. Good for a variety of Pharma and Food related applications.
Temperature Range Comparison
Box: Base Material Family Range
Whiskers: Specialty Compounds
General Information
Full Name
Aflas®:
Aflas® (TFE/P, FEPM)
Buna-N:
Buna-N (NBR, Nitrile, Buna)
Short Name
Aflas®:
Aflas®
Buna-N:
Buna-N
Common Names
Aflas®:
Aflas, TFE/P, FEPM
Buna-N:
Buna-N, Nitrile, NBR, Acrylonitrile Butadiene Rubber
Mechanical Properties
Specialty Resistances
Di-ester Lubricants
Di-ester Lubricants
Petroleum Oils
Petroleum Oils
Solvents
Solvents
Steam <400ºF
Alcohols
Most Acids
Ethylene Glycol Fluids
Skydrol Fluids
Water
Low Molecular Weight Ethers
Hydraulic Fluids
Low Molecular Weight Esters
Silicone Oils
Vacuum
Diluted Alkalies
Halogenated Hydrocarbons
Aliphatic Hydrocarbons
Ammonia
Greases
Amines
Vegetable Oils
Acetone
Mineral Oils
Brake Fluids
Common Fuels
Strong Acids
Acids
Gamma-ray Radiation
Hydrogen Sulfide (H2S)
Highly Reactive Inorganic Chemicals
Highly Reactive Organic Chemicals
Hot Amines
Ozone
Steam
Bases
Specialty Resistances
Aflas®
Steam <400ºF
Most Acids
Skydrol Fluids
Low Molecular Weight Ethers
Low Molecular Weight Esters
Vacuum
Halogenated Hydrocarbons
Ammonia
Amines
Acetone
Brake Fluids
Strong Acids
Gamma-ray Radiation
Hydrogen Sulfide (H2S)
Highly Reactive Inorganic Chemicals
Highly Reactive Organic Chemicals
Hot Amines
Ozone
Steam
Bases
Buna-N
Alcohols
Ethylene Glycol Fluids
Water
Hydraulic Fluids
Silicone Oils
Diluted Alkalies
Aliphatic Hydrocarbons
Greases
Vegetable Oils
Mineral Oils
Common Fuels
Acids
Brands
Nipol®
Brands
Aflas®
Buna-N
Nipol®
Limitations
Aromatic Fuels
Aromatic Fuels
Chlorinated Hydrocarbons
Chlorinated Hydrocarbons
Ketones
Ketones
Carbon Tetrachloride
UV Light
Organic Refrigerants
Aldehydes
Esters
Polar Solvents
Glycol Brake Fluids (DOT 3, 4, 5.1)
Weathering And Sunlight
Non-flammable Hydraulic Fluids
Aromatic Hydrocarbons
Limitations
Aflas®
Carbon Tetrachloride
Organic Refrigerants
Buna-N
UV Light
Aldehydes
Esters
Polar Solvents
Glycol Brake Fluids (DOT 3, 4, 5.1)
Weathering And Sunlight
Non-flammable Hydraulic Fluids
Aromatic Hydrocarbons
Marco Rubber & Plastics is an industry leader in custom sealing solutions that go beyond the limits of catalog commodities. Since 1980, our solutions have delivered reliable, long-lasting success for customers worldwide. We offer the largest inventory of specialty and standard sealing solutions backed by best-in-class technology, service and support.
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