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Rulon Bearings

Celanese Celcon® M25 POM, Unfilled
Categories: Polymer; Thermoplastic; Acetal (Polyoxymethylene, POM)
Material Notes: Celcon« acetal copolymer grade M25 is a high molecular weight, higher toughness and impact resistance grade primarily used for extrusion and selected injection molding applications.

Information provided by Celanese
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Physical PropertiesMetricEnglishComments
Specific Gravity 1.41 g/cc1.41 g/ccASTM D792
Density 1.41 g/cc0.0509 lb/in³ISO 1183
Density of Compound 1.20 g/cc0.0434 lb/in³
Moisture Absorption 0.200 %0.200 %23°C/50%RH; ISO 62
Water Absorption at Saturation 0.75 %0.75 %ISO 62
Linear Mold Shrinkage, Flow 0.022 cm/cm0.022 in/inASTM D955
 0.022 cm/cm0.022 in/inISO 294-4
Linear Mold Shrinkage, Transverse 0.018 cm/cm0.018 in/inASTM D955
 0.018 cm/cm0.018 in/inISO 294-4
Melt Flow 2.5 g/10 min2.5 g/10 minASTM D1238
 2.2 g/10 min
@Load 2.16 kg,
Temperature 190 °C		2.2 g/10 min
@Load 4.76 lb,
Temperature 374 °F		[cm3/10min]; ISO 1133
 
Mechanical PropertiesMetricEnglishComments
Tensile Strength, Yield 60.7 MPa8800 psiASTM D638
 63.0 MPa9140 psi50mm/min; ISO 527-2/1A
 34.5 MPa
@Temperature 71.1 °C		5000 psi
@Temperature 160 °F		ASTM D638
 94.5 MPa
@Temperature -40.0 °C		13700 psi
@Temperature -40.0 °F		ASTM D638
Elongation at Yield 12 %12 %50mm/min; ISO 527-2/1A
Tensile Modulus 2.46 GPa357 ksi50mm/min; ISO 527-2/1A
Flexural Modulus 2.43 GPa352 ksiISO 178
 2.59 GPa375 ksiASTM D790
 0.689 GPa
@Temperature 104 °C		100 ksi
@Temperature 220 °F		ASTM D790
 1.24 GPa
@Temperature 71.1 °C		180 ksi
@Temperature 160 °F		ASTM D790
Izod Impact, Notched 0.801 J/cm1.50 ft-lb/inASTM D256
 0.641 J/cm
@Temperature -40.0 °C		1.20 ft-lb/in
@Temperature -40.0 °F		ASTM D256
Izod Impact, Notched (ISO) 8.30 kJ/m²3.95 ft-lb/in²ISO 180/1A
Charpy Impact Unnotched 25.0 J/cm²119 ft-lb/in²partial break; ISO 179/1eU
 19.0 J/cm²
@Temperature -30.0 °C		90.4 ft-lb/in²
@Temperature -22.0 °F		ISO 179/1eU
Charpy Impact, Notched 0.910 J/cm²4.33 ft-lb/in²ISO 179/1eA
Tensile Creep Modulus, 1 hour 2100 MPa305000 psiISO 899-1
Tensile Creep Modulus, 1000 hours 1100 MPa160000 psiISO 899-1
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity 1.00e+14 ohm-cm1.00e+14 ohm-cmASTM D257
 
Thermal PropertiesMetricEnglishComments
CTE, linear, Parallel to Flow 120 µm/m-°C66.7 µin/in-°FISO 11359-2
CTE, linear, Transverse to Flow 120 µm/m-°C66.7 µin/in-°FISO 11359-2
Specific Heat Capacity 2.21 J/g-°C0.528 BTU/lb-°F
Thermal Conductivity 0.155 W/m-K1.08 BTU-in/hr-ft²-°F
Melting Point 165 °C329 °FASTM D3418
 166 °C331 °F10°C/min; ISO 11357-1,-2,-3
Deflection Temperature at 1.8 MPa (264 psi) 94.0 °C201 °FISO 75-1, -2
 110 °C230 °FASTM D648
 
Processing PropertiesMetricEnglishComments
Processing Temperature 80.0 - 120 °C176 - 248 °Fcavity
 180 - 200 °C356 - 392 °Fhot runner
Zone 1 170 - 180 °C338 - 356 °F
Zone 2 180 - 190 °C356 - 374 °F
Zone 3 180 - 190 °C356 - 374 °F
Zone 4 190 - 200 °C374 - 392 °F
Die Temperature 190 - 200 °C374 - 392 °F
Melt Temperature 180 - 200 °C356 - 392 °F
Ejection Temperature 140 °C284 °F
Drying Temperature 80.0 - 100 °C176 - 212 °F
Dry Time 3.00 hour3.00 hour
Injection Pressure 60.0 - 120 MPa8700 - 17400 psi
Hold Pressure 60.0 - 120 MPa8700 - 17400 psi
Back Pressure <= 4.00 MPa<= 580 psi
 
Descriptive Properties
Injection moldingYes
Injection speedslow
PelletsYes
Processing conditions acc. ISO9988-2
Profile extrusionYes

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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