Freudenberg N470 Nitrile Elastomer (NBR)

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Freudenberg N470 Nitrile Elastomer (NBR)
Categories:	Polymer; Thermoset; Rubber or Thermoset Elastomer (TSE)
Material Notes:	General Purpose; Internal Lubricant. Inferior resistance to ozone, sunlight and natural aging; poor resistance to oxygenated solvents. All testing done on AS568-214 size o-rings This product was formerly sold under the Freudenberg Simrit division; now Freudenberg Sealing Technologies.
Key Words:	CHEMIGUM® , HYCAR® , PARACRIL® , PERBUNAN®, KRYNAC®, NYSYSN®
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Physical Properties	Metric	English	Comments

Specific Gravity	1.24 g/cc	1.24 g/cc	ASTM D297

Mechanical Properties	Metric	English	Comments
Hardness, Shore A	75	75	Original Property; ASTM D2240
	67	67	ASTM Reference Fuel B Immersion, 168 hours; ASTM D2240
	71	71	ASTM IRM-903 Oil Immersion, 70 hours; ASTM D2240
	77	77	Air Aging, 70 hours; ASTM D2240
Tensile Strength, Ultimate	17.8 MPa	2580 psi	Original Property; ASTM D1414
	9.100 MPa	1320 psi	ASTM Reference Fuel B Immersion, 168 hours; ASTM D1414
	18.02 MPa	2614 psi	Air Aging, 70 hours; ASTM D1414
Elongation at Break	377 %	377 %	Original Property; ASTM D1414
	267.67 %	267.67 %	ASTM Reference Fuel B Immersion, 168 hours; ASTM D1414
	324.22 %	324.22 %	Air Aging, 70 hours; ASTM D1414
Compression Set	64 % @Temperature 125 °C, Time 252000 sec	64 % @Temperature 257 °F, Time 70.0 hour	ASTM D395 Method B

Descriptive Properties
Bend (flat)	Pass		AMS 7270K
Bend Oval	PASS		Low Temp. Brittleness, Fuel B, 48 hours at 23°C, then Fuel A, 48 hours at 23°C, then Fuel A 5 hours at -40°C per AMS-7270K paragraph 4.5.2
Volume Change (%), ASTM D471	-1.4		Low Temp. Brittleness, Fuel B, 48 hours at 23°C, then Fuel A, 48 hours at 23°C, then Fuel A 5 hours at -40°C per AMS-7270K paragraph 4.5.2
	15		ASTM IRM-903 Oil Immersion, 70 hours
	34		ASTM Reference Fuel B Immersion, 168 hours

Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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PSIMR141 / 79103

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