*The Natural Rubber o-ring compound attributes are used to outline the basic properties. Natural Rubber o-ring attributes can be adjusted by modifying the basic compound.
*Due to the number of interacting forces, it is STRONGLY RECOMMENDED THAT YOUR ELASTOMER SELECTION BE RIGOROUSLY TESTED IN THE ACTUAL APPLICATION, performance assumptions must be checked so that you are certain that all variables have been carefully considered.
*The chemical compatibility and physical properties are listed as general characteristics of the Natural Rubber o-ring compound. Speciality compounds can be derived to enhance or modify the performance to meet o-ring’s application needs.
| Chemical Description |
Natural Rubber |
| Abbreviations (ASTM 1418) |
NR |
| ISO / DIN |
NR |
| Other Trade Names |
Isoprene (IR) |
| ASTM D2000 Designations |
AA |
| Low Temperature Range |
-60°F / -51°C |
| High Temperature Range |
220°F / 104°C |
Natural Rubber
Physical Properties |
Very
Good |
Good |
Fair |
Poor |
| Abrasion Resistance |
1 |
|
|
|
| Acid Resistance |
|
|
3 |
|
| Chemical Resistance |
|
|
3 |
|
| Cold Resistance |
|
2 |
|
|
| Compression Set Resistance |
|
2 |
|
|
| Dynamic Properties |
1 |
|
|
|
| Electrical Properties |
|
2 |
|
|
| Elongation |
|
|
3 |
|
| Flame Resistance |
|
|
|
4 |
| Heat Resistance |
|
|
3 |
|
| Impermeability |
|
|
3 |
|
| Oil Resistance |
|
|
|
4 |
| Ozone Resistance |
|
|
|
4 |
| Tear Resistance |
|
2 |
|
|
| Tensile Strength |
1 |
|
|
|
| Water / Steam Resistance |
|
|
3 |
|
| Weather Resistance |
|
|
3 |
|
O-ring Measurement Chart
Natural Rubber Orings can be made in custom sizes to fit any application specific needs. Our engineering staff can review your application and design a solution that satisfies those requirements. You can find assistance with
oring gland design here. You can find assistance with
oring design here. To request a quote on your oring specifications please
submit a RFQ here.
Standard AS568 Natural Rubber O-Rings
All Natural Rubber
AS568 o-rings have three measurement types. First, a nominal inch reference, then actual inch sizes, and finally the metric size displayed in millimeters. Natural Rubber o-rings are stocked and cataloged by their AS568 number. This number references the Aerospace Standard 568 (AS 568) which was published by the SAE (Society of Automotive Engineers). Each o-ring is assigned a dash number which correlates directly to an exact o-ring size. You may view a complete chart of these o-ring sizes
here.Standard Metric Natural Rubber O-Rings
Natural Rubber O-rings can be made in several metric sizes. Natural Rubber
metric O-rings are cataloged by their cross section and inside diameter. Columbia references the metric Natural Rubber o-rings by the compound number and the cross section along with the inside diameter. You may view a complete chart of the metric o-ring sizes
here.
Natural Rubber O-Rings are speciality o-rings and only available as a special order. Please
submit an RFQ for pricing, and availability.
Natural rubber is a product coagulated from the latex of the rubber tree, hevea brasiliensis. Isoprene rubber is a synthetic substitute which exhibits the same properties as natural rubber. Natural rubber
o-rings are commonly referred to as their synthetic name Isoprene orings. Columbia offers Natural Rubber orings as a speciality oring compound. Columbia can also develop custom natural rubber o-rings by modifying the synthetic compound (Isoprene) to meet customer applications or specifications.
Natural Rubber
Chemical Resistance |
Very
Good |
Good |
Fair |
Poor |
| Acids, Inorganic |
|
2 |
|
|
| Alcohols |
|
2 |
|
|
| Animal & Vegetable Oils |
|
|
|
4 |
| Brake Fluids, Non-Petroleum Based |
|
2 |
|
|
| Dilute Acids |
|
2 |
|
|
| Dilute Alkalis |
|
2 |
|
|
| Hydraulic Fluids |
|
|
|
4 |
| Ketones |
|
|
3 |
|
| Petroleum Oils (Below 250ºF) |
|
|
|
4 |
| Refrigerant Ammonia |
|
2 |
|
|
| Silicone Fluids |
1 |
|
|
|
| Steam to 500ºF |
|
|
|
4 |
| Transmission Fluids (Type A) |
|
|
|
4 |
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Speciality Elastomers