Wefapress St 7000® EHT PE-UHMW

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Wefapress St 7000® EHT PE-UHMW
Categories:	Polymer; Thermoplastic; Polyethylene (PE); High Density (HDPE); UHMW PE (Ultra High Molecular Weight PE)
Material Notes:	St 7000® EHT is a further development from Wefapress, based on ultra-high molecular weight low pressure polyethylene with a molecular weight of approximately 9.2 million g/mol. This material type was finished with oxidation-inhibiting additives that allow extended use at higher temperatures. Information provided by Wefapress.
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Physical Properties	Metric	English	Comments

Density	>= 0.962 g/cc	>= 0.0348 lb/in³	DIN 53479
Moisture Absorption	<= 0.0100 %	<= 0.0100 %
Molecular Weight	9.20e+6 g/mol	9.20e+6 g/mol

Mechanical Properties	Metric	English	Comments
Hardness, Shore D	60 - 65 @Time 15.0 sec	60 - 65 @Time 0.00417 hour	DIN 53505
Ball Indentation Hardness	38.0 MPa @Time 30.0 sec	5510 psi @Time 0.00833 hour	DIN ISO 2039 Teil 1
Tensile Strength	23.0 MPa	3340 psi	DIN 53455
Tensile Strength, Ultimate	35.0 MPa	5080 psi	DIN 53455
Elongation at Break	>= 350 %	>= 350 %	DIN ISO / R 527
Modulus of Elasticity	0.700 GPa	102 ksi	DIN 53457
Charpy Impact, Notched	>= 10.0 J/cm²	>= 47.6 ft-lb/in²	DIN 53457
Coefficient of Friction	0.12	0.12
Sand Slurry	80	80	% Abrasion

Electrical Properties	Metric	English	Comments
Volume Resistivity	1.00e+15 ohm-cm	1.00e+15 ohm-cm	IEC 60093
Surface Resistance	1.00e+13 ohm	1.00e+13 ohm	IEC 60093
Dielectric Strength	45.0 kV/mm	1140 kV/in	IEC 60243

Thermal Properties	Metric	English	Comments
CTE, linear	90.0 µm/m-°C	50.0 µin/in-°F	DIN ISO 11359
Specific Heat Capacity	1.80 J/g-°C	0.430 BTU/lb-°F
Thermal Conductivity	0.400 W/m-K	2.78 BTU-in/hr-ft²-°F
Melting Point	130 - 135 °C	266 - 275 °F	DTA
Maximum Service Temperature, Air	47.0 °C	117 °F	Dimensional Stability; DIN 53461
	100 °C	212 °F	Continuous Application Temp.
Vicat Softening Point	80.0 °C	176 °F	DIN 53460
Minimum Service Temperature, Air	-200 °C	-328 °F
Flammability, UL94	HB	HB

Compliance Properties	Metric	English	Comments
FDA	Yes	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.

PWEFA916 / 243121

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