Material Selection Guide

Hydrogenated Nitrile

Trade Names:

ASTM D1418 Designation: HNBR

ASTM D2000/SAE J200 Type, Class: DH

Apple Compound Designation: ZT

Standard Color: Black

Description: HNBR is the product of the hydrogenation of Nitrile, resulting in varying degrees of saturation of the polymeric chain, with accompanying varying degrees of enhanced physical strength and chemical resistance properties.

Key Use(s): ALL oil resistant applications, including exposure to such oil additives as detergents, anti-oxidants and anti-wear agents. Exposure to oil soured with metal sludge. Seals for oil well applications. Seals for automotive fuel handling systems. Seals for general industrial usage.

Temperature Range
Standard Compound: -30° to +300°F (Dry Heat Only)
Special Compound: -76° to +347°F

Hardness (Shore A): 50 to 90

Features: Compounds can be formulated for service temperature ranging from -85°F to +350°F. Like Nitrile, increasing acrylonitrile content improves oil resistance at a cost of reduced low temperature performance. HNBR offers improved physical properties and better ozone resistance to Buna-N compounds. HNBR should be used when oil seals are also exposed to weather or environmental ozone.

Limitations: Like Nitrile, HNBR is not recommended for exposure to ethers, esters, ketones, or chlorinated hydrocarbons.



Featured Article

Video: 5 Things You Need to Know to Avoid Automated Assembly Issues

Video: 5 Things You Need to Know to Avoid Automated Assembly Issues

Recognizing seal feedability problems during the production process often occurs too late for a simple solution. That’s why we created a video that outlines exactly what you need to be on the lookout for.


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