Buna-N (NBR) vs Aflas® for O-Rings and Seals
Buna-N (NBR, Nitrile, Buna) | Aflas® (TFE/P, FEPM) |
Description | Both materials are well suited for use in the -10 to 125°C range. Aflas® 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 Buna-N having specific resistences to acids, common fuels, mineral oils, vegetable oils, greases, aliphatic hydrocarbons, diluted alkalies, silicone oils, hydraulic fluids, water, ethylene glycol fluids and alcohols. Aflas® has specific resistence 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. | |
| Compounds |
|---|
| Marco Compound Number | Datasheet | Hardness (Shore A) | Color | Low Temp | High Temp | Features | |||
|---|---|---|---|---|---|---|---|---|---|
| Compound: B1000 | Datasheet:  | Hardness: 70 | Color: Black | Low 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. | Get Quote | Buy Online | |
| Compound: B1001 | Datasheet: | Hardness: 90 | Color: Black | Low 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. | Get Quote | Buy Online | |
| Compound: B1002 | Datasheet: | Hardness: 70 | Color: Black | Low 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. | Get Quote | Buy Online | |
| Compound: B1005 | Datasheet: | Hardness: 90 | Color: Black | Low Temp: -30 °F (-35 °C) | High Temp: 250 °F (125 °C) | Description: FDA compliant, higher hardness. | Get Quote | Buy Online | |
| Compound: B1006 | Datasheet: | Hardness: 50 | Color: Black | Low 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. | Get Quote | Buy Online | |
| Compound: B1010 | Datasheet: | Hardness: 80 | Color: Black | Low Temp: -30 °F (-35 °C) | High Temp: 225 °F (110 °C) | Description: General purpose, higher hardness. Compare to Parker N0368-80. | Get Quote | Buy Online | |
| Compound: B1011 | Datasheet: | Hardness: 70 | Color: Black | Low 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. | Get Quote | Buy Online | |
| Compound: B1017 | Datasheet: | Hardness: 70 | Color: Black | Low Temp: -35 °F (-40 °C) | High Temp: 250 °F (125 °C) | Description: UL 157 listed for several approved uses. | Get Quote | Buy Online | |
| Compound: B1039 | Datasheet: | Hardness: 70 | Color: White | Low Temp: -30 °F (-35 °C) | High Temp: 250 °F (125 °C) | Description: | Get Quote | Buy Online | |
| Compound: B1058 | Datasheet: | Hardness: 70 | Color: Black | Low Temp: -30 °F (-35 °C) | High Temp: 250 °F (125 °C) | Description: NSF 61 certified for drinking water applications. | Get Quote | Buy Online | |
| Compound: B1063 | Datasheet: | Hardness: 95 | Color: Black | Low Temp: -30 °F (-35 °C) | High Temp: 250 °F (125 °C) | Description: Very high hardness for extreme pressure applications. | Get Quote | Buy Online | |
| Compound: B1083 | Datasheet: | Hardness: 70 | Color: Black | Low 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. | Get Quote | Buy Online | |
| Compound: B1105 | Datasheet: | Hardness: 70 | Color: Black | Low 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. | Get Quote | Buy Online | |
| Compound: B1115 | Datasheet: | Hardness: 70 | Color: Blue | Low Temp: -40 °F (-40 °C) | High Temp: 250 °F (125 °C) | Description: | Get Quote | Buy Online | |
| Compound: B1122 | Datasheet: | Hardness: 70 | Color: Black | Low Temp: -30 °F (-35 °C) | High Temp: 250 °F (125 °C) | Description: NSF 51 certified for food contact. | Get Quote | Buy Online | |
| Compound: M1000 | Datasheet: | Hardness: 70 | Color: Black | Low 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). | Get Quote | Buy Online | |
| Compound: M1001 | Datasheet: | Hardness: 75 | Color: Black | Low 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. | Get Quote | Buy Online | |
| Compound: M1002 | Datasheet: | Hardness: 65 | Color: Black | Low Temp: -65 °F (-55 °C) | High Temp: 250 °F (125 °C) | Description: Mil Spec (Military specification) MS29513-###, MS29512-##, AMS-P-5315B. | Get Quote | Buy Online | |
| Compound: M1004 | Datasheet: | Hardness: 90 | Color: Black | Low Temp: -65 °F (-55 °C) | High Temp: 275 °F (135 °C) | Description: Mil Spec (Military specification) MS28778, AMS-P-5510C. | Get Quote | Buy Online | |
| Compound: M1005 | Datasheet: | Hardness: 65 | Color: Black | Low Temp: -70 °F (-60 °C) | High Temp: 200 °F (95 °C) | Description: Mil Spec (Military specification) AMS7271, AS3578. | Get Quote | Buy Online | |
| Compound: L1000 | Datasheet: | Hardness: 80 | Color: Black | Low 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) | Get Quote | Buy Online | |
| Compound: L1003 | Datasheet: | Hardness: 90 | Color: Black | Low 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 | Get Quote | Buy Online | |
| Compound: L1009 | Datasheet: | Hardness: 90 | Color: Black | Low 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 | Get Quote | Buy Online | |
| Compound: L1011 | Datasheet: | Hardness: 80 | Color: Black | Low 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. | Get Quote | Buy Online |
| Temperature Range Comparison |
|---|
Box: Base Material Family Range
Whiskers: Specialty Compounds
| General Information | ||
|---|---|---|
Full Name | Buna-N: Buna-N (NBR, Nitrile, Buna) | Aflas®: Aflas® (TFE/P, FEPM) |
Short Name | Buna-N: Buna-N | Aflas®: Aflas® |
Common Names | Buna-N: Buna-N, Nitrile, NBR, Acrylonitrile Butadiene Rubber | Aflas®: Aflas, TFE/P, FEPM |
| Mechanical Properties |
|---|
| Specialty Resistances | ||
|---|---|---|
Di-ester Lubricants | Di-ester Lubricants | |
Petroleum Oils | Petroleum Oils | |
Solvents | Solvents | |
Alcohols | Steam <400ºF | |
Ethylene Glycol Fluids | Most Acids | |
Water | Skydrol Fluids | |
Hydraulic Fluids | Low Molecular Weight Ethers | |
Silicone Oils | Low Molecular Weight Esters | |
Diluted Alkalies | Vacuum | |
Aliphatic Hydrocarbons | Halogenated Hydrocarbons | |
Greases | Ammonia | |
Vegetable Oils | Amines | |
Mineral Oils | Acetone | |
Common Fuels | Brake Fluids | |
Acids | Strong Acids | |
Gamma-ray Radiation | ||
Hydrogen Sulfide (H2S) | ||
Highly Reactive Inorganic Chemicals | ||
Highly Reactive Organic Chemicals | ||
Hot Amines | ||
Ozone | ||
Steam | ||
Bases |
| Specialty Resistances | |
|---|---|
| Buna-N | Alcohols Ethylene Glycol Fluids Water Hydraulic Fluids Silicone Oils Diluted Alkalies Aliphatic Hydrocarbons Greases Vegetable Oils Mineral Oils Common Fuels Acids |
| 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 |
| Brands | ||
|---|---|---|
Nipol® |
| Brands | |
|---|---|
| Buna-N | Nipol® |
| Aflas® |
| Limitations | ||
|---|---|---|
Aromatic Fuels | Aromatic Fuels | |
Chlorinated Hydrocarbons | Chlorinated Hydrocarbons | |
Ketones | Ketones | |
UV Light | Carbon Tetrachloride | |
Aldehydes | Organic Refrigerants | |
Esters | ||
Polar Solvents | ||
Glycol Brake Fluids (DOT 3, 4, 5.1) | ||
Weathering And Sunlight | ||
Non-flammable Hydraulic Fluids | ||
Aromatic Hydrocarbons |
| Limitations | |
|---|---|
| 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 |
| Aflas® | Carbon Tetrachloride Organic Refrigerants |
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.
