Seals Eastern 7157 Nitrile Rubber

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Seals Eastern 7157 Nitrile Rubber
Categories:	Polymer; Thermoplastic; Elastomer, TPE; Thermoplastic Elastomer, Melt-Processible Rubber
Material Notes:	Nitrile for oil & gas service Information provided by Seals Eastern, Inc.
Key Words:	NBR
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Physical Properties	Original Value	Comments

Specific Gravity	1.294 g/cc	ASTM D297, 15

Mechanical Properties	Original Value	Comments
Hardness, Shore A	>= 86	ASTM D2240, Type A
	91	AVG; ASTM D2240, Type A
	94 @Treatment Temp. 100 °C, Time 252000 sec	After Dry Heat Aging; ASTM D865
	94 @Treatment Temp. 100 °C, Time 605000 sec	After Dry Heat Aging; ASTM D865
	95 @Treatment Temp. 100 °C, Time 1.21e+6 sec	After Dry Heat Aging; ASTM D865
	97 @Treatment Temp. 100 °C, Time 3.60e+6 sec	After Dry Heat Aging; ASTM D865
Tensile Strength at Break	>= 2837 psi	ASTM D412 Method A
	3436 psi	AVG; ASTM D412 Method A
	2938 psi @Treatment Temp. 100 °C, Time 3.60e+6 sec	After Dry Heat Aging; ASTM D412 Method A
	3240 psi @Treatment Temp. 100 °C, Time 1.21e+6 sec	After Dry Heat Aging; ASTM D412 Method A
	3367 psi @Treatment Temp. 100 °C, Time 605000 sec	After Dry Heat Aging; ASTM D412 Method A
	3388 psi @Treatment Temp. 100 °C, Time 252000 sec	After Dry Heat Aging; ASTM D412 Method A
Tensile Stress at Strain	>= 406 psi @Strain 50 %	Minimum; ASTM D412 Method A
	641 psi @Strain 25 %	Average; ASTM D412 Method A
	952 psi @Strain 50 %	Average; ASTM D412 Method A
	>= 1200 psi @Strain 100 %	Minimum; ASTM D412 Method A
	1779 psi @Strain 100 %	Average; ASTM D412 Method A
Elongation at Break	>= 124 %	ASTM D412 Method A
	308 %	AVG; ASTM D412 Method A
	192.2 % @Treatment Temp. 100 °C, Time 3.60e+6 sec	After Dry Heat Aging; ASTM D865
	251.3 % @Treatment Temp. 100 °C, Time 1.21e+6 sec	After Dry Heat Aging; ASTM D865
	317.8 % @Treatment Temp. 100 °C, Time 605000 sec	After Dry Heat Aging; ASTM D865
	399 % @Treatment Temp. 100 °C, Time 252000 sec	After Dry Heat Aging; ASTM D865
Modulus of Elasticity	5.032 ksi	ASTM D412 Method A
Poissons Ratio	0.50	Calculated
Shear Modulus	1.672 ksi	ASTM D412 Method A
Secant Modulus	4.73 ksi	ASTM D412 Method A
Tear Strength Test	296	(psi); ASTM D624, Die B
Compression Set	10.4 % @Temperature 100 °C, Time 79200 sec	ASTM D395, Test B
	15 % @Temperature 100 °C, Time 252000 sec	ASTM D395, Test B
	28 % @Temperature 100 °C, Time 1.21e+6 sec	ASTM D395, Test B

Thermal Properties	Original Value	Comments
Glass Transition Temp, Tg	-13.0 °F	ASTM D1329

Descriptive Properties
Strain Energy / Unit Volume at 20% Elongation (psi)	72

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 go back to viewing the property data in MatWeb's normal format.

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