HYDROGENATED NITRILE RUBBER (HNBR) GASKETS

HNBR is widely known for its physical strength and retention of properties after long-term exposure to heat, oil, and

chemicals. Depending on filler selection and loading, HNBR compounds typically have tensile strengths of 20 – 31

MPa when measured at 23°C. Compound

ing techniques allow for HNBR to be used over a broad temperature range,

-40° to 165°C, with minimal degradation over long periods of time. For low-temperature performance, low ACN

grades should be used; high-temperature performance can

be obtained by using highly saturated HNBR grades with

white fillers. As a group, HNBR elastomers have excellent

resistance to common automotive fluids (e.g., engine oil,

coolant, fuel, etc.) and many industri

al chemicals. Like NBR, fluid and ch

emical resistance improves as the ACN

content is increased. 

Rubber Material Selection Guide

HNBR or Highly Saturated Nitrile

         Abbreviation HNBR

         ASTM D-2000 Classification DH

         Chemical Definition Hydrogenated Acrylonitrile Butadiene

         RRP Compound Number Category 30000 Series

        ♦ Physical & Mechanical Properties

         Durometer or Hardness Range 30 – 95 Shore A

         Tensile Strength Range 1,500 – 3,500 PSI

         Elongation (Range %) 90 % – 550 %

         Abrasion Resistance Good to Excellent

         Adhesion to Metal Excellent

         Adhesion to Rigid Materials Good to Excellent

         Compression Set Good to Excellent

         Flex Cracking Resistance Fair to Good

         Impact Resistance Excellent 

         Resilience / Rebound Good

         Tear Resistance Good to Excellent

         Vibration Dampening Fair to Good