319 – Natural Rubber / Styrene Butadiene Rubber (NR/SBR)

ASTM D-2000 classification: AA


Temperature Range:

-25° to + 75°C



Natural rubber is used extensively in many applications and products, as is synthetic rubber. Natural rubber is an ideal polymer for dynamic or static engineering applications. Natural rubber cannot compare with many synthetics for heat aging and resistance to sunlight, Ozone, oxygen, but by blending it with SBR you can increase some of its better characteristics further.



Excellent dynamic properties with a low hysteresis loss, Good low temperature properties, Strong bonding to metal parts, High resistance to tear and abrasion, Ease of processing. 

An extremely resilient elastomer, NR/SBR are resistant to many organic salts and acids, and some organic solvents.



Applications include Hose and tubing, Vibration Isolators, Shock Mounts, and Electrical Components amongst a host of others.


EMI Reference SpecificationHardness IRHD SGTensile Strength (MPa)Elongation at Break %Abrasion Resistance mm ³Colour
313 - 401BShot Blast Economy 40°1.0318600140Black
313 - 451TShot Blast Economy45°1.0516600140Tan
313 - 452RShot Blast Economy45°1.0516600140Red
313 - 602BShot Blast 60°1.1514400120Black
313 - 602TShot Blast 60°1.1514400120Tan
313 - 602RShot Blast 60°1.1514400120Red
313 - 803BHard Commercial 60°1.157450110Black

Full data sheets for all grades are available on request.

* The information above is supplied in good faith and believed to be correct. This information is supplied upon the condition that persons receiving this will make their own determination as to its suitability for their purposes prior to use. EMI makes no representations or warranties, either expressed or implied with respect to the information or the product to which this information refers.