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3mm X 34mm Metric HNBR Green 70 O-Ring


$3.51

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  • Model: HG3.00X034
  • 0 in Stock

Metric O-rings - Cross Section "CS" X Inside Diameter "ID"

Description: Highly Saturated Nitrile

Hydrogenation of nitrile rubber removes most of the residual unsaturation in the polymer to make it far less vulnerable to attack by heat, ozone, and oxygen. In fact, due to superior oil and temperature resistance, Highly Saturated Nitrile can sometimes be substituted for more costly fluorocarbon rubber. It is frequently used in automotive air conditioning systems employing R-134a refrigerants. HNBR can be can be either peroxide or sulfur cured, depending on the degree of unsaturation achieved by the hydrogenation process, but peroxide is almost always used due to the good heat stability properties of the peroxide cross links. It can be compounded for both low and high temperature use.

Hydrogenated Nitrile Butadiene Rubber, also known as Highly Saturated Nitrile (HSN), is produced by hydrogenating acrylonitrile butadiene rubber (NBR).This process improves the heat and ozone resistance, increases tensile strength, and provides superior abrasion resistance. The result is a rubber polymer that performs superior to standard NBR in most sealing applications.

Taking advantage of its inherent properties, HNBR can be compounded to provide excellent service life in applications such as oilfield, automotive, and refrigerants. Dynamic applications requiring long service life or in abrasive environments are especially well suited to HNBR.

Operating Temperature:

The service temperature range is generally -40° to 300° F (-40° to 150° C)

Composition

Highly Saturated Nitrile

Physical Properties*

 
Excellent
Good
Fair
Poor
Abrasion resistance
 
 
 
Compression Set
 
 
 
Elongation
 
 
 
Flame resistance
 
 
 
Gas permeability
 
 
 
Low temperature flexibility
 
 
 
Tear resistance
 
 
 
Tensile strength
 
 
 

Chemical Resistance*

 
Excellent
Good
Fair
Poor
Automatic transmission fluid
 
 
 
Automotive refrigerants
 
 
 
Oxygenated fuels
 
 
 
Ozone
 
 
 
Petroleum oils
 
 
 
Sour crude oil
 
 
 
Weather
 
 
 

*Excellent, good, fair and poor are intended to serve as general guidelines only. Actual testing in the application environment is always recommended.

 




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