HNBR - 70 B 3 M1 [X115/1] - Elastomer Engineering

Identification & Functionality

Features & Benefits

Materials Features: Gas Barrier,
Good Abrasion Resistance,
Good Compression Set,
Good Elongation,
Good Tear Strength,
High Tensile Strength,
Hot Water Resistant,
Oil Resistant,
Ozone Resistant,
Steam Resistant,
Wide Temperature Operating Range
Product Background: Hydrogenated AcryloNitrile Butadiene Rubber (HNBR) properties depend upon the acrylonitrile content and the degree of hydrogenation of the copolymer. They have somewhat better oil and chemical resistance than nitrile rubber and can withstand much higher temperatures.

Advantages of HNBR

HNBR has excellent resistance to sour oil and gas, steam, hot water and ozone. Physical properties such as tensile and tear strength, elongation, abrasion resistance and compression set are excellent, while compounds exhibit good dynamic behavior at elevated temperatures. Like EPDM, hydrogenated nitrile rubber can either be cured with sulfur or peroxide, depending upon which properties are the most important. Components in HNBR offer an excellent range of performance at a cost between nitrile rubber and fluoroelastomers (FKM).

Disadvantages of HNBR

The limitations of HNBR include poor electrical properties, poor flame resistance, and it can easily be damaged by aromatic oils and polar organic solvents.

Applications & Uses

Markets: Industrial
Applications: Industrial — Chemical & Industrial Manufacturing
Equipment & Parts
Industrial — Oil, Gas & Mining
Exploration & Upstream
Plastics & Elastomers End Uses: Bladders,
Diaphragms,
Gaskets
Typical Applications: Accumulator Bladders

Diaphragms

Gaskets

Seals (especially for the oil and gas industries)

Properties

Color: Black
Typical Properties
Typical Properties: 2mm Test Plate Cured for 20 minutes at 165°C, Post Cured for 2 hours at 150°C
Note: * - Volume change (%) after immersion in Fuel B, 24 hours at 40°C

** - Volume change (%) after immersion in Methanol, 24 hours at 40°C

*** - Heat Aging 72 hours at 150°C

	Value	Units	Test Method / Conditions
Density	1.16 - 1.2	g/cm³	ISO 2781
Hardness	70.0	IRHD	ISO 48
Tensile Strength	27.4	MPa	ISO 37
Modulus (100%)	6.1	MPa	—
Modulus (200%)	18.0	MPa	—
Modulus (300%)	26.3	MPa	—
Elongation at Break	317.0	%	ISO 37
Compression Set (22 hours at 150°C)	22.2	%	ISO 815
Resistance to Liquids*	40.9	%	ISO 1817
Resistance to Liquids**	16.0	%	ISO 1817
Change in Hardness***	4.0	IRHD	ISO 48
Change in Tensile Strength***	2.9	%	ISO 37
Change in Elongation at Break***	-6.3	%	ISO 37
Service Temperature	-25 to 160	°C	—

HNBR 70 B 3 M1 [X115/1]