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Overview of materials for Acetal Copolymer, Unreinforced
Categories: Polymer; Thermoplastic; Acetal (Polyoxymethylene, POM); Acetal Copolymer, Unreinforced
Material Notes: This property data is a summary of similar materials in the MatWeb database for the category "Acetal Copolymer, Unreinforced". 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 PropertiesMetricEnglishComments
Density 0.950 - 1.71 g/cc0.0343 - 0.0618 lb/in³Average value: 1.41 g/cc Grade Count:584
Water Absorption 0.0500 - 4.00 %0.0500 - 4.00 %Average value: 0.418 % Grade Count:215
 0.330 - 0.330 %
@Temperature 50.0 - 50.0 °C		0.330 - 0.330 %
@Temperature 122 - 122 °F		Average value: 0.330 % Grade Count:3
 0.330 - 0.330 %
@Time 86400 - 86400 sec		0.330 - 0.330 %
@Time 24.0 - 24.0 hour		Average value: 0.330 % Grade Count:3
Moisture Absorption at Equilibrium 0.0200 - 1.40 %0.0200 - 1.40 %Average value: 0.251 % Grade Count:157
Water Absorption at Saturation 0.100 - 8.00 %0.100 - 8.00 %Average value: 0.875 % Grade Count:95
Maximum Moisture Content 0.0200 - 0.1500.0200 - 0.150Average value: 0.112 Grade Count:39
 0.200 - 0.300
@Temperature 100 - 100 °C		0.200 - 0.300
@Temperature 212 - 212 °F		Average value: 0.250 Grade Count:2
 0.200 - 0.300
@Time 299 - 299 sec		0.200 - 0.300
@Time 0.0830 - 0.0830 hour		Average value: 0.250 Grade Count:2
Linear Mold Shrinkage 0.00210 - 0.0360 cm/cm0.00210 - 0.0360 in/inAverage value: 0.0205 cm/cm Grade Count:382
 0.0200 - 0.0220 cm/cm
@Temperature 80.0 - 80.0 °C		0.0200 - 0.0220 in/in
@Temperature 176 - 176 °F		Average value: 0.0207 cm/cm Grade Count:8
Linear Mold Shrinkage, Transverse 0.00210 - 0.0335 cm/cm0.00210 - 0.0335 in/inAverage value: 0.0204 cm/cm Grade Count:154
 0.0180 - 0.0190 cm/cm
@Temperature 80.0 - 80.0 °C		0.0180 - 0.0190 in/in
@Temperature 176 - 176 °F		Average value: 0.0185 cm/cm Grade Count:8
Melt Flow 0.200 - 58.8 g/10 min0.200 - 58.8 g/10 minAverage value: 14.4 g/10 min Grade Count:439
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell E 52.4 - 86.252.4 - 86.2Average value: 61.5 Grade Count:4
Hardness, Rockwell M 35.0 - 97.035.0 - 97.0Average value: 79.9 Grade Count:152
Hardness, Rockwell R 69.0 - 13069.0 - 130Average value: 103 Grade Count:69
Hardness, Shore D 70.0 - 86.070.0 - 86.0Average value: 80.9 Grade Count:29
Ball Indentation Hardness 30.0 - 180 MPa4350 - 26100 psiAverage value: 137 MPa Grade Count:87
Tensile Strength, Ultimate 6.37 - 71.0 MPa925 - 10300 psiAverage value: 56.6 MPa Grade Count:266
 28.0 - 68.0 MPa
@Temperature -40.0 - 80.0 °C		4060 - 9860 psi
@Temperature -40.0 - 176 °F		Average value: 42.1 MPa Grade Count:3
Tensile Strength, Yield 21.0 - 75.8 MPa3050 - 11000 psiAverage value: 59.7 MPa Grade Count:358
 25.0 - 94.4582 MPa
@Temperature -40.0 - 120 °C		3630 - 13700.0 psi
@Temperature -40.0 - 248 °F		Average value: 55.5 MPa Grade Count:5
Elongation at Break 1.50 - 250 %1.50 - 250 %Average value: 35.1 % Grade Count:512
 15.0 - 98.0 %
@Temperature -40.0 - 90.0 °C		15.0 - 98.0 %
@Temperature -40.0 - 194 °F		Average value: 84.0 % Grade Count:10
Elongation at Yield 6.50 - 50.0 %6.50 - 50.0 %Average value: 11.3 % Grade Count:189
 5.80 - 10.0 %
@Temperature -40.0 - 80.0 °C		5.80 - 10.0 %
@Temperature -40.0 - 176 °F		Average value: 8.37 % Grade Count:2
Modulus of Elasticity 0.586 - 11.7 GPa85.0 - 1700 ksiAverage value: 2.66 GPa Grade Count:369
 0.480 - 4.50 GPa
@Temperature -40.0 - 90.0 °C		69.6 - 653 ksi
@Temperature -40.0 - 194 °F		Average value: 1.71 GPa Grade Count:10
 2.41 - 2.81 GPa
@Temperature 30.0 - 120 °C		350 - 408 ksi
@Temperature 86.0 - 248 °F		Average value: 1.71 GPa Grade Count:1
 2.41 - 2.81 GPa
@Thickness 1.50 - 4.00 mm		350 - 408 ksi
@Thickness 0.0591 - 0.157 in		Average value: 1.71 GPa Grade Count:1
Flexural Yield Strength 24.0 - 862 MPa3480 - 125000 psiAverage value: 83.6 MPa Grade Count:370
Flexural Modulus 0.276 - 210 GPa40.0 - 30500 ksiAverage value: 2.95 GPa Grade Count:433
Compressive Yield Strength 8.27 - 110 MPa1200 - 16000 psiAverage value: 54.0 MPa Grade Count:40
Compressive Modulus 1.03 - 2.76 GPa150 - 400 ksiAverage value: 2.07 GPa Grade Count:21
Poissons Ratio 0.350 - 0.4300.350 - 0.430Average value: 0.363 Grade Count:6
Fatigue Strength 22.8 - 31.0 MPa3300 - 4500 psiAverage value: 27.1 MPa Grade Count:4
Shear Strength 40.0 - 55.2 MPa5800 - 8000 psiAverage value: 52.0 MPa Grade Count:21
Izod Impact, Notched 0.320 J/cm - NB0.599 ft-lb/in - NBAverage value: 1.15 J/cm Grade Count:191
 0.300 - 1.00 J/cm
@Temperature -40.0 - -29.0 °C		0.562 - 1.87 ft-lb/in
@Temperature -40.0 - -20.2 °F		Average value: 0.569 J/cm Grade Count:11
Izod Impact, Unnotched 0.363 J/cm - NB0.680 ft-lb/in - NBAverage value: 5.36 J/cm Grade Count:28
Izod Impact, Notched (ISO) 2.50 - 19.8 kJ/m²1.19 - 9.42 ft-lb/in²Average value: 7.05 kJ/m² Grade Count:105
 3.99 - 7.00 kJ/m²
@Temperature -40.0 - -30.0 °C		1.90 - 3.33 ft-lb/in²
@Temperature -40.0 - -22.0 °F		Average value: 5.61 kJ/m² Grade Count:30
Izod Impact, Unnotched (ISO) 100 kJ/m² - NB47.6 ft-lb/in² - NBAverage value: 407 kJ/m² Grade Count:10
 100 - 100 kJ/m²
@Temperature -30.0 - -30.0 °C		47.6 - 47.6 ft-lb/in²
@Temperature -22.0 - -22.0 °F		Average value: 100 kJ/m² Grade Count:1
Charpy Impact Unnotched 2.40 J/cm² - NB11.4 ft-lb/in² - NBAverage value: 18.1 J/cm² Grade Count:153
 2.00 J/cm² - NB
@Temperature -40.0 - -20.0 °C		9.52 ft-lb/in² - NB
@Temperature -40.0 - -4.00 °F		Average value: 18.6 J/cm² Grade Count:85
Charpy Impact, Notched 0.140 - 1000 J/cm²0.666 - 4760 ft-lb/in²Average value: 0.694 J/cm² Grade Count:348
 0.250 J/cm² - NB
@Temperature -40.0 - -20.0 °C		1.19 ft-lb/in² - NB
@Temperature -40.0 - -4.00 °F		Average value: 0.590 J/cm² Grade Count:82
 1.30 - 1.30 J/cm²
@Temperature -30.0 - -30.0 °C		6.19 - 6.19 ft-lb/in²
@Temperature -22.0 - -22.0 °F		Average value: 0.590 J/cm² Grade Count:1
 1.30 - 1.30 J/cm²
@Thickness 4.00 - 4.00 mm		6.19 - 6.19 ft-lb/in²
@Thickness 0.157 - 0.157 in		Average value: 0.590 J/cm² Grade Count:1
Gardner Impact 22.6 - 22.6 J16.7 - 16.7 ft-lbAverage value: 22.6 J Grade Count:5
Tensile Impact Strength 5.78 - 1060 kJ/m²2.75 - 506 ft-lb/in²Average value: 240 kJ/m² Grade Count:8
Falling Dart Impact 22.6 - 32.1 J16.7 - 23.7 ft-lbAverage value: 27.8 J Grade Count:3
Instrumented Impact Total Energy 16.5 - 18.4 J12.2 - 13.6 ft-lbAverage value: 17.2 J Grade Count:3
Coefficient of Friction 0.0980 - 0.8000.0980 - 0.800Average value: 0.294 Grade Count:100
Coefficient of Friction, Static 0.110 - 0.3300.110 - 0.330Average value: 0.157 Grade Count:24
Tensile Creep Modulus, 1 hour 1800 - 2500 MPa261000 - 363000 psiAverage value: 2270 MPa Grade Count:15
Tensile Creep Modulus, 1000 hours 400 - 1450 MPa58000 - 210000 psiAverage value: 1210 MPa Grade Count:57
K (wear) Factor 0.200 - 10000 x 10-8 mm³/N-M0.0993 - 4960 x 10-10 in³-min/ft-lb-hrAverage value: 786 x 10-8 mm³/N-M Grade Count:56
Limiting Pressure Velocity 0.0701 - 0.600 MPa-m/sec2000 - 17100 psi-ft/minAverage value: 0.208 MPa-m/sec Grade Count:9
Taber Abrasion, mg/1000 Cycles 14.014.0Average value: 14.0 Grade Count:18
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 0.200 - 1.00e+16 ohm-cm0.200 - 1.00e+16 ohm-cmAverage value: 1.75e+15 ohm-cm Grade Count:298
Surface Resistance 100 - 3.00e+16 ohm100 - 3.00e+16 ohmAverage value: 3.87e+15 ohm Grade Count:311
Static Decay 0.00300 - 2.00 sec0.00300 - 2.00 secAverage value: 1.34 sec Grade Count:6
Dielectric Constant 3.40 - 5.003.40 - 5.00Average value: 3.83 Grade Count:154
Dielectric Strength 15.7 - 86.6 kV/mm399 - 2200 kV/inAverage value: 26.3 kV/mm Grade Count:204
Dissipation Factor 0.00100 - 0.5300.00100 - 0.530Average value: 0.0106 Grade Count:133
Dielectric Loss Index 0.00200 - 0.008000.00200 - 0.00800Average value: 0.00418 Grade Count:8
Arc Resistance 1.90 - 240 sec1.90 - 240 secAverage value: 121 sec Grade Count:23
Comparative Tracking Index 600 V600 VAverage value: 600 V Grade Count:115
Hot Wire Ignition, HWI 0.000 - 15.0 sec0.000 - 15.0 secAverage value: 9.13 sec Grade Count:4
High Amp Arc Ignition, HAI 120 arcs120 arcsAverage value: 120 arcs Grade Count:4
 
Thermal PropertiesMetricEnglishComments
CTE, linear 11.0 - 216 µm/m-°C6.11 - 120 µin/in-°FAverage value: 109 µm/m-°C Grade Count:318
CTE, linear, Transverse to Flow 20.0 - 180 µm/m-°C11.1 - 100 µin/in-°FAverage value: 115 µm/m-°C Grade Count:107
Specific Heat Capacity 1.30 - 1.50 J/g-°C0.311 - 0.359 BTU/lb-°FAverage value: 1.46 J/g-°C Grade Count:26
Thermal Conductivity 0.231 - 0.390 W/m-K1.60 - 2.71 BTU-in/hr-ft²-°FAverage value: 0.307 W/m-K Grade Count:35
Melting Point 160 - 186 °C320 - 367 °FAverage value: 167 °C Grade Count:339
Maximum Service Temperature, Air 47.0 - 150 °C117 - 302 °FAverage value: 108 °C Grade Count:127
Deflection Temperature at 0.46 MPa (66 psi) 95.0 - 316 °C203 - 601 °FAverage value: 157 °C Grade Count:200
Deflection Temperature at 1.8 MPa (264 psi) 49.0 - 205 °C120 - 401 °FAverage value: 102 °C Grade Count:528
Vicat Softening Point 10.5 - 180 °C50.9 - 356 °FAverage value: 148 °C Grade Count:123
Heat Distortion Temperature 72.2 - 98.0 °C162 - 208 °FAverage value: 84.0 °C Grade Count:5
Minimum Service Temperature, Air -50.0 - -20.0 °C-58.0 - -4.00 °FAverage value: -40.4 °C Grade Count:25
Glass Transition Temp, Tg -65.0 - -50.0 °C-85.0 - -58.0 °FAverage value: -58.4 °C Grade Count:16
Decomposition Temperature 240 °C464 °FAverage value: 240 °C Grade Count:21
UL RTI, Electrical 50.0 - 110 °C122 - 230 °FAverage value: 104 °C Grade Count:5
UL RTI, Mechanical with Impact 50.0 - 95.0 °C122 - 203 °FAverage value: 89.0 °C Grade Count:4
UL RTI, Mechanical without Impact 50.0 - 100 °C122 - 212 °FAverage value: 92.0 °C Grade Count:4
Flammability, UL94 HB - V-2HB - V-2Grade Count:342
Oxygen Index 15.0 - 18.0 %15.0 - 18.0 %Average value: 15.6 % Grade Count:5
Ignition Temperature 320 - 340 °C608 - 644 °FAverage value: 330 °C Grade Count:22
 
Processing PropertiesMetricEnglishComments
Processing Temperature 80.0 - 300 °C176 - 572 °FAverage value: 197 °C Grade Count:81
Nozzle Temperature 170 - 227 °C338 - 440 °FAverage value: 194 °C Grade Count:60
Melt Temperature 100 - 230 °C212 - 446 °FAverage value: 193 °C Grade Count:215
Mold Temperature 40.0 - 140 °C104 - 284 °FAverage value: 82.5 °C Grade Count:251
Injection Velocity 20.0 - 90.0 mm/sec0.787 - 3.54 in/secAverage value: 41.1 mm/sec Grade Count:9
Drying Temperature 71.1 - 121 °C160 - 250 °FAverage value: 92.3 °C Grade Count:202
Moisture Content 0.0200 - 0.200 %0.0200 - 0.200 %Average value: 0.0903 % Grade Count:30
Dew Point -31.7 °C-25.0 °FAverage value: -31.7 °C Grade Count:3
Injection Pressure 2.76 - 118 MPa400 - 17100 psiAverage value: 52.7 MPa Grade Count:73
Vent Depth 0.00127 cm0.000500 inAverage value: 0.00127 cm Grade Count:4

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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