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Elmet Technologies

Overview of materials for Acetal Homopolymer, Unreinforced
Categories: Polymer; Thermoplastic; Acetal (Polyoxymethylene, POM); Acetal Homopolymer, Unreinforced
Material Notes: This property data is a summary of similar materials in the MatWeb database for the category "Acetal Homopolymer, 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 1.34 - 1.67 g/cc0.0484 - 0.0603 lb/in³Average value: 1.42 g/cc Grade Count:167
 1.14 - 1.19 g/cc
@Temperature 205 - 215 °C		0.0412 - 0.0430 lb/in³
@Temperature 401 - 419 °F		Average value: 1.17 g/cc Grade Count:14
Water Absorption 0.0100 - 1.40 %0.0100 - 1.40 %Average value: 0.470 % Grade Count:46
Moisture Absorption at Equilibrium 0.100 - 0.900 %0.100 - 0.900 %Average value: 0.266 % Grade Count:29
Water Absorption at Saturation 0.200 - 1.40 %0.200 - 1.40 %Average value: 0.846 % Grade Count:15
Viscosity  47100 - 183000 cP
@Temperature 195 - 235 °C		47100 - 183000 cP
@Temperature 383 - 455 °F		Average value: 104000 cP Grade Count:1
 47100 - 183000 cP
@Shear Rate 500 - 7000 1/s		47100 - 183000 cP
@Shear Rate 500 - 7000 1/s		Average value: 104000 cP Grade Count:1
Linear Mold Shrinkage 0.0100 - 0.0400 cm/cm0.0100 - 0.0400 in/inAverage value: 0.0198 cm/cm Grade Count:114
Linear Mold Shrinkage, Transverse 0.0100 - 0.0300 cm/cm0.0100 - 0.0300 in/inAverage value: 0.0183 cm/cm Grade Count:40
Melt Flow 1.00 - 70.0 g/10 min1.00 - 70.0 g/10 minAverage value: 12.6 g/10 min Grade Count:138
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell M 50.0 - 95.050.0 - 95.0Average value: 88.3 Grade Count:33
Hardness, Rockwell R 78.0 - 12278.0 - 122Average value: 115 Grade Count:37
Hardness, Shore D 76.0 - 85.076.0 - 85.0Average value: 82.2 Grade Count:6
Ball Indentation Hardness 150 - 175 MPa21800 - 25400 psiAverage value: 161 MPa Grade Count:4
Tensile Strength, Ultimate 45.0 - 78.0 MPa6530 - 11300 psiAverage value: 63.8 MPa Grade Count:48
 31.0 - 90.0 MPa
@Temperature -40.0 - 100 °C		4500 - 13100 psi
@Temperature -40.0 - 212 °F		Average value: 50.5 MPa Grade Count:3
Tensile Strength, Yield 13.0 - 90.0 MPa1890 - 13100 psiAverage value: 67.3 MPa Grade Count:133
 28.0 - 88.0 MPa
@Temperature -40.0 - 100 °C		4060 - 12800 psi
@Temperature -40.0 - 212 °F		Average value: 58.0 MPa Grade Count:1
Elongation at Break 2.00 - 110 %2.00 - 110 %Average value: 35.9 % Grade Count:158
 10.0 - 230 %
@Temperature -40.0 - 100 °C		10.0 - 230 %
@Temperature -40.0 - 212 °F		Average value: 160 % Grade Count:2
Elongation at Yield 7.00 - 30.0 %7.00 - 30.0 %Average value: 16.7 % Grade Count:53
 8.00 - 8.00 %
@Temperature -40.0 - 100 °C		8.00 - 8.00 %
@Temperature -40.0 - 212 °F		Average value: 8.00 % Grade Count:1
Modulus of Elasticity 1.93 - 3.72 GPa280 - 540 ksiAverage value: 3.05 GPa Grade Count:111
 0.930 - 3.62 GPa
@Temperature -40.0 - 100 °C		135 - 525 ksi
@Temperature -40.0 - 212 °F		Average value: 2.28 GPa Grade Count:1
Flexural Yield Strength 37.9 - 267 MPa5500 - 38800 psiAverage value: 93.4 MPa Grade Count:76
Flexural Modulus 1.38 - 3.90 GPa200 - 565 ksiAverage value: 2.84 GPa Grade Count:143
 0.900 - 4.14 GPa
@Temperature -40.0 - 100 °C		131 - 600 ksi
@Temperature -40.0 - 212 °F		Average value: 1.89 GPa Grade Count:2
Compressive Yield Strength 14.0 - 114 MPa2030 - 16500 psiAverage value: 65.6 MPa Grade Count:11
Compressive Modulus 0.317 - 3.10 GPa46.0 - 450 ksiAverage value: 2.17 GPa Grade Count:3
Poissons Ratio 0.3700.370Average value: 0.370 Grade Count:21
Shear Modulus 0.203 - 1.50 GPa
@Temperature -50.0 - 150 °C		29.4 - 218 ksi
@Temperature -58.0 - 302 °F		Average value: 0.822 GPa Grade Count:1
Shear Strength 55.0 - 67.0 MPa7980 - 9720 psiAverage value: 62.4 MPa Grade Count:6
Izod Impact, Notched 0.374 - 12.8 J/cm0.700 - 24.0 ft-lb/inAverage value: 1.01 J/cm Grade Count:73
 0.400 - 0.960 J/cm
@Temperature -40.0 - -29.0 °C		0.749 - 1.80 ft-lb/in
@Temperature -40.0 - -20.2 °F		Average value: 0.705 J/cm Grade Count:4
Izod Impact, Unnotched 0.667 J/cm - NB1.25 ft-lb/in - NBAverage value: 8.16 J/cm Grade Count:10
Izod Impact, Notched (ISO) 4.00 - 15.0 kJ/m²1.90 - 7.14 ft-lb/in²Average value: 8.56 kJ/m² Grade Count:16
 6.00 - 12.0 kJ/m²
@Temperature -40.0 - -30.0 °C		2.86 - 5.71 ft-lb/in²
@Temperature -40.0 - -22.0 °F		Average value: 7.82 kJ/m² Grade Count:11
Izod Impact, Unnotched (ISO) 250 - 250 kJ/m²
@Temperature -30.0 - -30.0 °C		119 - 119 ft-lb/in²
@Temperature -22.0 - -22.0 °F		Average value: 250 kJ/m² Grade Count:1
Charpy Impact Unnotched 4.00 J/cm² - NB19.0 ft-lb/in² - NBAverage value: 21.5 J/cm² Grade Count:38
 3.50 - 999.9 J/cm²
@Temperature -30.0 - -30.0 °C		16.7 - 4759 ft-lb/in²
@Temperature -22.0 - -22.0 °F		Average value: 25.3 J/cm² Grade Count:27
Charpy Impact, Notched 0.300 - 1.60 J/cm²1.43 - 7.61 ft-lb/in²Average value: 0.891 J/cm² Grade Count:90
 0.300 - 1.30 J/cm²
@Temperature -40.0 - -30.0 °C		1.43 - 6.19 ft-lb/in²
@Temperature -40.0 - -22.0 °F		Average value: 0.813 J/cm² Grade Count:36
Gardner Impact 22.6 - 22.6 J16.7 - 16.7 ft-lbAverage value: 22.6 J Grade Count:6
Tensile Impact Strength 98.1 - 358 kJ/m²46.7 - 170 ft-lb/in²Average value: 199 kJ/m² Grade Count:6
Coefficient of Friction 0.110 - 0.4600.110 - 0.460Average value: 0.260 Grade Count:15
Coefficient of Friction, Static 0.140 - 0.4500.140 - 0.450Average value: 0.224 Grade Count:7
Tensile Creep Modulus, 1 hour 2300 - 3000 MPa334000 - 435000 psiAverage value: 2820 MPa Grade Count:11
Tensile Creep Modulus, 1000 hours 1100 - 1700 MPa160000 - 247000 psiAverage value: 1570 MPa Grade Count:11
K (wear) Factor 11.1 - 111 x 10-8 mm³/N-M5.50 - 55.0 x 10-10 in³-min/ft-lb-hrAverage value: 44.3 x 10-8 mm³/N-M Grade Count:3
Taber Abrasion, mg/1000 Cycles 10.0 - 13.010.0 - 13.0Average value: 12.3 Grade Count:4
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 1.00e+10 - 1.00e+15 ohm-cm1.00e+10 - 1.00e+15 ohm-cmAverage value: 6.38e+14 ohm-cm Grade Count:31
Surface Resistance 1.00e+13 - 1.00e+16 ohm1.00e+13 - 1.00e+16 ohmAverage value: 2.80e+15 ohm Grade Count:26
Dielectric Constant 3.10 - 4.103.10 - 4.10Average value: 3.71 Grade Count:31
Dielectric Strength 15.7 - 118 kV/mm399 - 3000 kV/inAverage value: 28.5 kV/mm Grade Count:22
Dissipation Factor 0.00150 - 0.01800.00150 - 0.0180Average value: 0.00617 Grade Count:27
Comparative Tracking Index 600 V600 VAverage value: 600 V Grade Count:17
 
Thermal PropertiesMetricEnglishComments
CTE, linear 21.6 - 180 µm/m-°C12.0 - 100 µin/in-°FAverage value: 104 µm/m-°C Grade Count:82
 99.0 - 150 µm/m-°C
@Temperature 22.8 - 150 °C		55.0 - 83.3 µin/in-°F
@Temperature 73.0 - 302 °F		Average value: 135 µm/m-°C Grade Count:5
CTE, linear, Transverse to Flow 90.0 - 120 µm/m-°C50.0 - 66.7 µin/in-°FAverage value: 106 µm/m-°C Grade Count:25
 130 - 160 µm/m-°C
@Temperature 55.0 - 100 °C		72.2 - 88.9 µin/in-°F
@Temperature 131 - 212 °F		Average value: 143 µm/m-°C Grade Count:3
Specific Heat Capacity 3.00 - 3.02 J/g-°C
@Temperature 215 - 215 °C		0.717 - 0.722 BTU/lb-°F
@Temperature 419 - 419 °F		Average value: 3.01 J/g-°C Grade Count:3
Thermal Conductivity 0.230 - 0.375 W/m-K1.60 - 2.60 BTU-in/hr-ft²-°FAverage value: 0.311 W/m-K Grade Count:10
 0.220 - 0.220 W/m-K
@Temperature 215 - 215 °C		1.53 - 1.53 BTU-in/hr-ft²-°F
@Temperature 419 - 419 °F		Average value: 0.220 W/m-K Grade Count:2
Melting Point 157 - 180 °C315 - 356 °FAverage value: 175 °C Grade Count:98
Maximum Service Temperature, Air 80.0 - 150 °C176 - 302 °FAverage value: 104 °C Grade Count:16
Deflection Temperature at 0.46 MPa (66 psi) 115 - 340 °C239 - 644 °FAverage value: 163 °C Grade Count:117
Deflection Temperature at 1.8 MPa (264 psi) 78.8 - 277 °C174 - 531 °FAverage value: 107 °C Grade Count:157
Vicat Softening Point 148 - 180 °C298 - 356 °FAverage value: 160 °C Grade Count:9
Minimum Service Temperature, Air -50.0 °C-58.0 °FAverage value: -50.0 °C Grade Count:5
UL RTI, Electrical 50.0 - 110 °C122 - 230 °FAverage value: 88.0 °C Grade Count:8
UL RTI, Mechanical with Impact 50.0 - 90.0 °C122 - 194 °FAverage value: 73.9 °C Grade Count:8
UL RTI, Mechanical without Impact 50.0 - 95.0 °C122 - 203 °FAverage value: 77.2 °C Grade Count:8
Flammability, UL94 HBHBGrade Count:91
Flame Spread 20.0 - 80.0 mm/min0.787 - 3.15 in/minAverage value: 28.5 mm/min Grade Count:13
Oxygen Index 15.0 - 23.0 %15.0 - 23.0 %Average value: 20.4 % Grade Count:5
 
Processing PropertiesMetricEnglishComments
Processing Temperature 177 - 300 °C350 - 572 °FAverage value: 227 °C Grade Count:8
Nozzle Temperature 188 - 216 °C370 - 420 °FAverage value: 195 °C Grade Count:5
Melt Temperature 177 - 230 °C350 - 446 °FAverage value: 206 °C Grade Count:81
Mold Temperature 40.0 - 121 °C104 - 250 °FAverage value: 85.2 °C Grade Count:74
Drying Temperature 71.1 - 121 °C160 - 250 °FAverage value: 82.4 °C Grade Count:73
Moisture Content 0.0500 - 0.200 %0.0500 - 0.200 %Average value: 0.191 % Grade Count:39
Injection Pressure 68.9 - 110 MPa10000 - 16000 psiAverage value: 90.9 MPa Grade Count:12
Vent Depth 0.00127 cm0.000500 inAverage value: 0.00127 cm Grade Count:3
Annealing Temperature 160 °C320 °FAverage value: 160 °C Grade Count:20

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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O1280 / 77853




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