GEHR Plastics POM-C 25GF®

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GEHR Plastics POM-C 25GF®
Categories:	Polymer; Thermoplastic; Acetal (Polyoxymethylene, POM); Acetal Copolymer, 30% Glass Fiber Reinforced
Material Notes:	The chemically coupled GEHR-C POM 25GFTM has a broad property profile that offers increased strength for many applications compared to non-reinforced GEHR POM™. In addition, the reinforcement reduces the coefficient of expansion and simultaneously increases the heat deflection temperature. Features: Pressure tested quality; High strength and stiffness; High rigidity (to -40 °C); High thermal stability; Low water absorption; High dimension stability; Good electrical insulating properties; Very good sliding properties; High resistance to solvents; Very high resistance to stress cracks Applications: Components in machinery engineering Information provided by GEHR Plastics, Inc.
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Physical Properties	Metric	English	Comments

Specific Gravity	1.58 g/cc	1.58 g/cc	ISO 1183
Water Absorption	0.900 %	0.900 %	ISO 62
Moisture Absorption	0.150 %	0.150 %	ISO 62

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell H	190	190	ISO 2039
Tensile Strength at Break	130 MPa	18900 psi	ISO 527
Elongation at Break	3.00 %	3.00 %	ISO 527
Modulus of Elasticity	8.80 GPa	1280 ksi	ISO 527
Charpy Impact Unnotched	5.50 J/cm²	26.2 ft-lb/in²	ISO 179
Charpy Impact, Notched	0.800 J/cm²	3.81 ft-lb/in²	ISO 179

Electrical Properties	Metric	English	Comments
Volume Resistivity	>= 1.00e+12 ohm-cm	>= 1.00e+12 ohm-cm	IEC 60093
Surface Resistance	>= 1.00e+13 ohm	>= 1.00e+13 ohm	IEC 60093
Dielectric Constant	4.00 @Frequency 1.00e+6 Hz	4.00 @Frequency 1.00e+6 Hz	IEC 60250
Dielectric Strength	43.0 kV/mm	1090 kV/in	IEC 60243-1
Dielectric Loss Index	0.00700 @Frequency 1.00e+6 Hz	0.00700 @Frequency 1.00e+6 Hz	IEC 60250
Comparative Tracking Index	600 V	600 V	IEC 60112

Thermal Properties	Metric	English	Comments
Melting Point	168 °C	334 °F	ISO 3146
Maximum Service Temperature, Air	110 °C	230 °F	UL746B
Deflection Temperature at 1.8 MPa (264 psi)	163 °C	325 °F	ISO 75
Vicat Softening Point	160 °C	320 °F	VST/B/50; ISO 306
Minimum Service Temperature, Air	-40.0 °C	-40.0 °F	UL746B
Flammability, UL94	HB	HB

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PGEHR104 / 327197

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