Zell-Metall Engineering Plastics Zellamid 250 (PA6.6)

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Zell-Metall Engineering Plastics Zellamid 250 (PA6.6)
Categories:	Polymer; Thermoplastic; Nylon (Polyamide PA); Nylon 66 (PA66); Nylon 66, Impact Grade
Material Notes:	Zellamid® 250 is noted for its high temperature resistance and high tensile strength. It is the hardest and most rigid type of extruded Nylon. Main characteristics are high resistance to fuels, oils, greases, most organic solvents and alkalis. Moisture absorption is lower than for Nylon 6. Typical applications are friction bearings, gears, cams and cam followers, guides, sleeves, valve seats and articles subjected to high loads and/or for high temperature.
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Physical Properties	Original Value	Comments

Density	1.13 - 1.15 g/cc
Moisture Absorption at Equilibrium	2.5 - 3.1 %	50% RH; ISO 1110; DIN 53714
Water Absorption at Saturation	8.0 - 9.0 %	23°C; ISO 62; DIN 53495

Mechanical Properties	Original Value	Comments
Ball Indentation Hardness	160 MPa	H 358/30; ISO 2039; DIN 53456
Tensile Strength at Break	80.0 MPa	ISO 527; DIN 53455
Elongation at Break	50 %	ISO 527; DIN 53455
Tensile Modulus	3.20 GPa	ISO 527; DIN 53452
Izod Impact, Notched	0.300 J/cm @Temperature -40.0 °C	ISO 180 Method A
Charpy Impact Unnotched	NB @Temperature -40.0 °C	ISO 179; DIN 53453
	NB @Temperature 23.0 °C	ISO 179; DIN 53453
Charpy Impact, Notched	8.00 J/cm²	double V-notch, rk=1.5 mm; DIN 53753
Dart Drop, Total Energy	>= 140 J	DIN 53443
	50.0 J @Temperature -20.0 °C	DIN 53443

Electrical Properties	Original Value	Comments
Volume Resistivity	1.00e+15 ohm-cm	IEC 167; DIN 53482
Surface Resistance	1.00e+13 ohm	IEC 167; DIN 53482
Dielectric Constant	3.2 @Frequency 1e+6 Hz	IEC 250; DIN 53483
Dielectric Strength	120 kV/mm	IEC 243; DIN 53481
Dissipation Factor	0.026 @Frequency 1e+6 Hz	IEC 250; DIN 53483
Comparative Tracking Index	>= 600 V	KB Method; IEC 112; DIN 53480
	>= 600 V	KC Method; IEC 112; VDE 0303T1

Thermal Properties	Original Value	Comments
CTE, linear	70.0 - 100 µm/m-°C @Temperature 20.0 °C	DIN 53752
Specific Heat Capacity	1.70 J/g-°C	DIN 52612
Thermal Conductivity	0.230 W/m-K	DIN 53612 Method A
Melting Point	255 °C	ISO 1218 Method A; DIN 53736
Maximum Service Temperature, Air	80.0 °C	20,000 hours; 50% Tensile Strength; IEC 216; DIN 53446
	95.0 °C	5000 hours; 50% Tensile Strength; IEC 216; DIN 53446
	<= 200 °C	a few hours operation
Deflection Temperature at 0.46 MPa (66 psi)	>= 200 °C	ISO 75; DIN 53461
Deflection Temperature at 1.8 MPa (264 psi)	100 °C	ISO 75; DIN 53461
Flammability, UL94	HB @Thickness 1.60 mm

Descriptive Properties
Time yield limit	3.5 MPa	100°C, s1/1000; ISO.899 DIN.53444
VDE Fire Performance	ll b	VDE 0304T3

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