Murtfeldt Murytal® H Acetal Homopolymer

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Murtfeldt Murytal® H Acetal Homopolymer
Categories:	Polymer; Thermoplastic; Acetal (Polyoxymethylene, POM); Acetal Homopolymer, Unreinforced
Material Notes:	In addition to the excellent properties of Murytal® C, Murytal® H is stronger and more rigid with a lower expansion coefficient. Special Properties: • High rigidity • Excellent ability to regain its form • Extremely good electric isolation properties • Practically no moisture absorption • Good resistance to chemicals (pH 4 – 9) • Approved for use in the food industry (EU and FDA) • Extremely good machinability Information provided by Murtfeldt Kunststoffe GmbH & Co. KG.
Key Words:	POM-H
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Physical Properties	Metric	English	Comments

Density	1.43 g/cc	0.0517 lb/in³	ISO 1183-1
Moisture Absorption at Equilibrium	0.20 % @Temperature 23.0 °C	0.20 % @Temperature 73.4 °F	50% RH
Water Absorption at Saturation	0.80 % @Temperature 23.0 °C	0.80 % @Temperature 73.4 °F

Mechanical Properties	Metric	English	Comments
Hardness, Rockwell M	88	88	dry; ISO 2039-2
Hardness, Shore D	83	83	DIN 53505
Ball Indentation Hardness	160 MPa	23200 psi	dry; ISO 2039-1
Tensile Strength, Yield	78.0 MPa	11300 psi	dry; ISO 527-1
	78.0 MPa	11300 psi	50% RH; ISO 527-1
Elongation at Break	50 %	50 %	dry; ISO 527-1
	50 %	50 %	50% RH; ISO 527-1
Creep Strength	15.0 MPa @Time 3.60e+6 sec	2180 psi @Time 1000 hour	stress leading to 1% elongation; dry; ISO 899-1
	15.0 MPa @Time 3.60e+6 sec	2180 psi @Time 1000 hour	stress leading to 1% elongation; 50% RH; ISO 899-1
Modulus of Elasticity	3.30 GPa	479 ksi	dry
	3.30 GPa	479 ksi	50% RH
Compressive Yield Strength	22.0 MPa @Strain 1 %	3190 psi @Strain 1 %	dry; ISO 604
	40.0 MPa @Strain 2 %	5800 psi @Strain 2 %	dry; ISO 604
	75.0 MPa @Strain 5.0 %	10900 psi @Strain 5.0 %	dry; ISO 604
Charpy Impact Unnotched	20.0 J/cm²	95.2 ft-lb/in²	dry; ISO 179-1/1eU
	>= 20.0 J/cm²	>= 95.2 ft-lb/in²	ISO 179
Charpy Impact, Notched	1.00 J/cm²	4.76 ft-lb/in²	dry; ISO 179-1/1eA
Coefficient of Friction, Dynamic	0.34	0.34

Electrical Properties	Metric	English	Comments
Electrical Resistivity	>= 1.00e+14 ohm-cm	>= 1.00e+14 ohm-cm	dry; IEC 60093
	>= 1.00e+14 ohm-cm	>= 1.00e+14 ohm-cm	50% RH; IEC 60093
Surface Resistance	>= 1.00e+13 ohm	>= 1.00e+13 ohm	dry; IEC 60093
	>= 1.00e+13 ohm	>= 1.00e+13 ohm	50% RH; IEC 60093
Dielectric Constant	3.8 @Frequency 100 Hz	3.8 @Frequency 100 Hz	dry; IEC 60250
	3.8 @Frequency 100 Hz	3.8 @Frequency 100 Hz	50% RH; IEC 60250
	3.8 @Frequency 1e+6 Hz	3.8 @Frequency 1e+6 Hz	dry; IEC 60250
	3.8 @Frequency 1e+6 Hz	3.8 @Frequency 1e+6 Hz	50% RH; IEC 60250
Dielectric Strength	20.0 kV/mm	508 kV/in	dry; IEC 60243-1
	20.0 kV/mm	508 kV/in	50% RH; IEC 60243-1
Dielectric Loss Index	0.0030 @Frequency 100 Hz	0.0030 @Frequency 100 Hz	dry; IEC 60250
	0.0030 @Frequency 100 Hz	0.0030 @Frequency 100 Hz	50% RH; IEC 60250
	0.0080 @Frequency 1e+6 Hz	0.0080 @Frequency 1e+6 Hz	dry; IEC 60250
	0.0080 @Frequency 1e+6 Hz	0.0080 @Frequency 1e+6 Hz	50% RH; IEC 60250

Thermal Properties	Metric	English	Comments
CTE, linear	95.0 µm/m-°C @Temperature 23.0 - 60.0 °C	52.8 µin/in-°F @Temperature 73.4 - 140 °F
	110 µm/m-°C @Temperature 23.0 - 100 °C	61.1 µin/in-°F @Temperature 73.4 - 212 °F
Thermal Conductivity	0.310 W/m-K	2.15 BTU-in/hr-ft²-°F
Melting Point	180 °C	356 °F	ISO 11357-1
Maximum Service Temperature, Air	90.0 °C @Time 7.20e+7 sec	194 °F @Time 20000 hour
	105 °C @Time 1.80e+7 sec	221 °F @Time 5000 hour
	150 °C @Time <=86400 sec	302 °F @Time <=24.0 hour
Minimum Service Temperature, Air	-50.0 °C	-58.0 °F
Glass Transition Temp, Tg	-50.0 °C	-58.0 °F	ISO 11357-1
Flammability, UL94	HB	HB

Compliance Properties	Metric	English	Comments
FDA	Yes	Yes

Descriptive Properties
Color	Natural/Black

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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PMURT928 / 156575

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