Overview of materials for Acetal Homopolymer, Unreinforced, Impact Grade

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Overview of materials for Acetal Homopolymer, Unreinforced, Impact Grade
Categories:	Polymer; Thermoplastic; Acetal (Polyoxymethylene, POM); Acetal Homopolymer, Unreinforced, Impact Grade
Material Notes:	This property data is a summary of similar materials in the MatWeb database for the category "Acetal Homopolymer, Unreinforced, Impact Grade". Each property range of values reported is minimum and maximum values of appropriate MatWeb entries. The comments report the average value, and number of data points used to calculate the average. The values are not necessarily typical of any specific grade, especially less common values and those that can be most affected by additives or processing methods.
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Physical Properties	Metric	English	Comments

Density	1.35 - 1.42 g/cc	0.0488 - 0.0513 lb/in³	Average value: 1.40 g/cc Grade Count:6
Water Absorption	0.500 - 1.90 %	0.500 - 1.90 %	Average value: 1.07 % Grade Count:3
Moisture Absorption at Equilibrium	0.170 - 0.300 %	0.170 - 0.300 %	Average value: 0.223 % Grade Count:3
Linear Mold Shrinkage	0.0140 - 0.0220 cm/cm	0.0140 - 0.0220 in/in	Average value: 0.0188 cm/cm Grade Count:6
Linear Mold Shrinkage, Transverse	0.0150 - 0.0190 cm/cm	0.0150 - 0.0190 in/in	Average value: 0.0177 cm/cm Grade Count:3
Melt Flow	1.70 - 10.0 g/10 min	1.70 - 10.0 g/10 min	Average value: 6.62 g/10 min Grade Count:5

Mechanical Properties	Metric	English	Comments
Tensile Strength, Ultimate	67.0 - 72.0 MPa	9720 - 10400 psi	Average value: 69.8 MPa Grade Count:4
Tensile Strength, Yield	43.0 - 70.0 MPa	6240 - 10200 psi	Average value: 57.5 MPa Grade Count:3
Elongation at Break	30.0 - 70.0 %	30.0 - 70.0 %	Average value: 49.6 % Grade Count:6
Elongation at Yield	12.0 - 22.0 %	12.0 - 22.0 %	Average value: 16.0 % Grade Count:3
Modulus of Elasticity	1.60 - 3.23 GPa	232 - 468 ksi	Average value: 2.73 GPa Grade Count:6
Izod Impact, Notched (ISO)	8.00 - 9.00 kJ/m² @Temperature -40.0 - -40.0 °C	3.81 - 4.28 ft-lb/in² @Temperature -40.0 - -40.0 °F	Average value: 8.50 kJ/m² Grade Count:2
Charpy Impact Unnotched	26.0 - 1000 J/cm²	124 - 4760 ft-lb/in²	Average value: 26.0 J/cm² Grade Count:3
	23.0 - 999.9 J/cm² @Temperature -30.0 - -30.0 °C	109 - 4759 ft-lb/in² @Temperature -22.0 - -22.0 °F	Average value: 24.5 J/cm² Grade Count:3
Charpy Impact, Notched	0.900 - 2.00 J/cm²	4.28 - 9.52 ft-lb/in²	Average value: 1.30 J/cm² Grade Count:6
	0.650 - 1.00 J/cm² @Temperature -30.0 - -30.0 °C	3.09 - 4.76 ft-lb/in² @Temperature -22.0 - -22.0 °F	Average value: 0.817 J/cm² Grade Count:3

Thermal Properties	Metric	English	Comments
CTE, linear	120 - 130 µm/m-°C	66.7 - 72.2 µin/in-°F	Average value: 125 µm/m-°C Grade Count:3
Melting Point	167 - 178 °C	333 - 352 °F	Average value: 175 °C Grade Count:3
Deflection Temperature at 0.46 MPa (66 psi)	127 - 168 °C	261 - 334 °F	Average value: 158 °C Grade Count:5
Deflection Temperature at 1.8 MPa (264 psi)	66.0 - 104 °C	151 - 219 °F	Average value: 91.3 °C Grade Count:6
Flammability, UL94	HB	HB	Grade Count:5

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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