BASF Ultraform® H 4320 AT POM

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BASF Ultraform® H 4320 AT POM
Categories:	Polymer; Thermoplastic; Acetal (Polyoxymethylene, POM); Acetal Copolymer, Unreinforced
Material Notes:	Product Description: Ultraform® H 4320 AT is an extrusion POM high molecular weight grade. This grade enables high extrusion rates with thick-walled product. It also exhibits high thermal stability and low tendency to discolor. Typical applications include pipe and semi-finished parts for gear wheels, bearings and other mechanical elements. Availability: North America Features: Good Color Stability; Good Thermal Stability; High Molecular Weight Use: Bearings; Gears; Piping Agency Ratings: EC 1907/2006 (REACH) RoSH Compliance: RoSH Compliant Processing Method: Extrusion; Injection Molding Information provided by BASF Corporation
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Physical Properties	Metric	English	Comments

Density	1.40 g/cc	0.0506 lb/in³	ISO 1183
Water Absorption	0.25 %	0.25 %	Equilibrium, 50% RH; ISO 62
Water Absorption at Saturation	1.0 %	1.0 %	ISO 62
Maximum Moisture Content	0.15	0.15
Linear Mold Shrinkage, Flow	0.021 cm/cm	0.021 in/in	ISO 294-4
Linear Mold Shrinkage, Transverse	0.022 cm/cm	0.022 in/in	ISO 294-4
Melt Flow	2.2 g/10 min @Load 2.16 kg, Temperature 190 °C	2.2 g/10 min @Load 4.76 lb, Temperature 374 °F	ISO 1133

Mechanical Properties	Metric	English	Comments
Tensile Strength, Yield	60.0 MPa	8700 psi	ISO 527-2
Elongation at Break	31 %	31 %	Nominal; ISO 527-2
Elongation at Yield	11 %	11 %	ISO 527-2
Tensile Modulus	2.40 GPa	348 ksi	ISO 527-1
Izod Impact, Notched (ISO)	6.09 kJ/m² @Temperature -30.0 °C	2.90 ft-lb/in² @Temperature -22.0 °F	ISO 180
	6.51 kJ/m² @Temperature 22.8 °C	3.10 ft-lb/in² @Temperature 73.0 °F	ISO 180
Charpy Impact Unnotched	25.2 J/cm² @Temperature -30.0 °C	120 ft-lb/in² @Temperature -22.0 °F	ISO 179
	25.2 J/cm² @Temperature 22.8 °C	120 ft-lb/in² @Temperature 73.0 °F	ISO 179
Charpy Impact, Notched	0.546 J/cm² @Temperature -30.0 °C	2.60 ft-lb/in² @Temperature -22.0 °F	ISO 179
	0.651 J/cm² @Temperature 22.8 °C	3.10 ft-lb/in² @Temperature 73.0 °F	ISO 179

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+13 ohm-cm	1.00e+13 ohm-cm	IEC 60093
Surface Resistance	1.00e+13 ohm	1.00e+13 ohm	IEC 60093
Dielectric Constant	3.8 @Frequency 1e+6 Hz	3.8 @Frequency 1e+6 Hz	IEC 60250
Dissipation Factor	0.0050 @Frequency 1e+6 Hz	0.0050 @Frequency 1e+6 Hz	IEC 60250
Comparative Tracking Index	600 V	600 V	Solution A; IEC 60112

Thermal Properties	Metric	English	Comments
CTE, linear, Parallel to Flow	121 µm/m-°C	67.0 µin/in-°F	ASTM E831
Melting Point	163 °C	325 °F	ISO 3146
Deflection Temperature at 1.8 MPa (264 psi)	90.0 °C	194 °F	Unannealed; ISO 75-2/A

Processing Properties	Metric	English	Comments
Melt Temperature	190 - 230 °C	374 - 446 °F
Mold Temperature	60.0 - 120 °C	140 - 248 °F
Drying Temperature	80.0 - 110 °C	176 - 230 °F
Dry Time	2.00 - 4.00 hour	2.00 - 4.00 hour
Injection Pressure	3.50 - 7.03 MPa	508 - 1020 psi

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PBASG2143 / 310836

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