Buna Rubber

Material Description: Buna Rubber (Black)
Temperature Range: -40°C to +100°C
Properties Unit  
Hardness ASTM D2240 85A
Tensile Strength ASTM D412 2739 PSI
Elongation ASTM D412 180%
Tensile Strength @ 100% ASTM D412 1841 PSI
Compression Set Aged 70 HR. @ 180°F ASTM D395B 9.6%
Air Aged 70 HR. @ 180°F ASTM D573  
Tensile Change   -4.1%
Elongation Change   -10.0%
Tensile Stress Change   +1.9%
Volume Change   -0.8%
Hardness Change   +4PTS.
Fluid Aged 70 HR. @ 180°F ASTM D471  
Fluid Medium: ASTM #3 Oil    
Tensile Change   -5.0%
Elongation Change   -15.0%
Tensile Stress Change   +8.4%
Volume Change   +13.3%
Hardness Change   -3PTS.
Applications: An Elastomer based on Acrylonitrile Butadiene Rubber, which is used for U-Cup Seals, Lip Seals, Chevron Packing, Special Seals and various components. This material stands out with it's high resistance to mineral oils and greases or HFA, HFB and HFC pressure fluids. NBR has excellent mechanical properties such as abrasion resistance and elasticity.

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