Hydrogenated nitrile rubber

STANDARDASTM D2000 (DH)FORMO-ring, seal, liningShort nameHSN

The hydrogenated form of NBR. High strength, heat resistance up to 150 °C and ozone resistance; used in oil and gas and hot oil service where NBR is not enough.

HARDNESS: Shore A 60–90
LOW-TEMPERATURE FLEXIBILITY °C: ≈ −48
TEMPERATURE: −40 … +150 °C
COST

Representative sample of HNBR: O-ring and sheet specimen — REPRESENTATIVE IMAGE · Colour is an industry habit; do not identify the material by its colour.

Chemical compatibility

Mechanical properties

TYPE	Heat resistance °C	Low-temperature flexibility °C	Typical hardness
General-purpose compound	150	≈ −48	Shore A 60–90

Service temperature

−40 °C+150 °C−200−1000100200300400500600700800

Media suitability GENERAL TREND

Water

Steam

Mineral oil

Fuel, aliphatic HC

Ozone, outdoor

Dilute acid

Caustic

Ketones, esters

Emsal assessment. The final choice is made from corrosion tables, taking concentration, temperature, chloride content and flow velocity into account.

Strengths and weaknesses

Strengths

Higher heat and ozone resistance than NBR
High mechanical strength, extrusion-resistant
Hot water and steam up to 149 °C

Weaknesses

Not suitable for chlorinated hydrocarbons and polar solvents
Weak in strong acids
More expensive than NBR

Manufacturing and use

ECONOMY: Medium.
MANUFACTURING METHODS: Moulding (compression, injection) · Vulcanization
TYPICAL VALVE PARTS: O-ring · Seal

Source: ASTM D2000 (DH). Values compiled and verified by Emsal Vana; for binding values, refer to the current edition of the standard and the material certificate.