GEHR Plastics PEI Polyetherimide

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GEHR Plastics PEI Polyetherimide
Categories:	Polymer; Thermoplastic; Polyetherimide (PEI)
Material Notes:	Polyetherimide has a high mechanical strength in connection with a good chemical and heat resistance, good dimensional stability and creep resistance. Its unique torque strength permits the economical substitution of machining fabricated small parts from steel. Properties very high strength and rigidity high torque strength and hardness high thermostability high weather resistance high radiation resistance self-extinguishing limited resistance to stress cracks Applications include parts for electrical engineering, food industry, and aircraft construction.
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Physical Properties	Metric	English	Comments

Specific Gravity	1.27 g/cc	1.27 g/cc	ISO 1183
Moisture Absorption at Equilibrium	0.25 %	0.25 %	ISO 62
Water Absorption at Saturation	1.3 %	1.3 %	ISO 62

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell M	109	109	ISO 2039
Hardness, Shore D	87	87	ISO 868
Ball Indentation Hardness	220 MPa	31900 psi	ISO 2039
Tensile Strength at Break	85.0 MPa	12300 psi	ISO 527
Tensile Strength, Yield	110 MPa	16000 psi	ISO 527
Elongation at Break	>= 30 %	>= 30 %	ISO 527
Elongation at Yield	6.0 %	6.0 %	ISO 527
Modulus of Elasticity	3.45 GPa	500 ksi	ISO 527
Flexural Strength	165 MPa	23900 psi	ISO 178
Charpy Impact Unnotched	11.5 J/cm²	54.7 ft-lb/in²	ISO 179

Electrical Properties	Metric	English	Comments
Volume Resistivity	3.00e+13 ohm-cm	3.00e+13 ohm-cm	IEC 60093
Surface Resistance	>= 1.00e+13 ohm	>= 1.00e+13 ohm	IEC 60093
Dielectric Constant	2.9 @Frequency 1e+6 Hz	2.9 @Frequency 1e+6 Hz	IEC 60250
Dielectric Strength	33.0 kV/mm	838 kV/in	IEC 60243-1
Dielectric Loss Index	0.0013 @Frequency 1e+6 Hz	0.0013 @Frequency 1e+6 Hz	IEC 60250
Comparative Tracking Index	125 V	125 V	IEC 60112

Thermal Properties	Metric	English	Comments
CTE, linear	56.0 µm/m-°C	31.1 µin/in-°F	ISO 11359
Thermal Conductivity	0.240 W/m-K @Temperature 20.0 °C	1.67 BTU-in/hr-ft²-°F @Temperature 68.0 °F	ISO 22007-4
Melting Point	217 °C	423 °F	DIN EN ISO 3146
Maximum Service Temperature, Air	170 °C	338 °F	UL 746B
Deflection Temperature at 0.46 MPa (66 psi)	200 °C	392 °F	ISO 75
Deflection Temperature at 1.8 MPa (264 psi)	190 °C	374 °F	ISO 75
Vicat Softening Point	211 °C	412 °F	VST/B/50; ISO 306
	215 °C	419 °F	VST/A/50; ISO 306
Glass Transition Temp, Tg	217 °C	423 °F	DIN EN ISO 3146
Flammability, UL94	V-0	V-0	test results without UL registration; UL 94
Oxygen Index	47 %	47 %	ASTM D2863

Compliance Properties	Metric	English	Comments
FDA	No	No	Physiological indifference

Descriptive Properties
Acid Resistance	yes
Aromatic Resistance	yes
Bondability	yes
CKW Resistance	limited
Color	natural
Hydrocarbonate Resistance	yes
Hydroxide Resistance	yes
Ketone Resistance	yes
Physiological indifference	yes, EEC
Resistance Against Hot Water	yes
UV Stabilization	yes

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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PGEHR034 / 79871

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