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Overview of materials for Polybutylene Terephthalate (PBT), 20% Glass Fiber Filled
Categories: Polymer; Thermoplastic; Polyester, TP; Polybutylene Terephthalate (PBT); Polybutylene Terephthalate (PBT), 20% Glass Fiber Filled
Material Notes: This property data is a summary of similar materials in the MatWeb database for the category "Polybutylene Terephthalate (PBT), 20% Glass Fiber Filled". Specific grades with glass content between 15% and 24% are included. 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 1.22 - 1.80 g/cc0.0441 - 0.0650 lb/in³Average value: 1.46 g/cc Grade Count:331
 1.14 - 1.32 g/cc
@Temperature 205 - 250 °C		0.0412 - 0.0477 lb/in³
@Temperature 401 - 482 °F		Average value: 1.20 g/cc Grade Count:8
Filler Content 15.0 - 20.0 %15.0 - 20.0 %Average value: 16.9 % Grade Count:86
Water Absorption 0.0100 - 0.500 %0.0100 - 0.500 %Average value: 0.213 % Grade Count:123
Moisture Absorption at Equilibrium 0.0200 - 0.400 %0.0200 - 0.400 %Average value: 0.150 % Grade Count:126
Water Absorption at Saturation 0.150 - 0.500 %0.150 - 0.500 %Average value: 0.345 % Grade Count:23
Viscosity 150000 cP150000 cPAverage value: 150000 cP Grade Count:3
 17.0 - 18.0 cP
@Temperature 250 - 265 °C		17.0 - 18.0 cP
@Temperature 482 - 509 °F		Average value: 45700 cP Grade Count:3
 17.0 - 18.0 cP
@Load 5.00 - 5.00 kg		17.0 - 18.0 cP
@Load 11.0 - 11.0 lb		Average value: 45700 cP Grade Count:3
 9.00 - 460190 cP
@Shear Rate 10.0 - 100000 1/s		9.00 - 460190 cP
@Shear Rate 10.0 - 100000 1/s		Average value: 45700 cP Grade Count:6
 9.00 - 460190 cP
@Temperature 230 - 280 °C		9.00 - 460190 cP
@Temperature 446 - 536 °F		Average value: 45700 cP Grade Count:6
Viscosity Test 69.0 - 116 cm³/g0.690 - 1.16 dl/gAverage value: 91.5 cm³/g Grade Count:10
Viscosity Number 94.0 - 135 cm³/g0.940 - 1.35 dl/gAverage value: 107 cm³/g Grade Count:19
Maximum Moisture Content 0.0200 - 0.04000.0200 - 0.0400Average value: 0.0209 Grade Count:22
 0.200 - 0.200
@Temperature 120 - 120 °C		0.200 - 0.200
@Temperature 248 - 248 °F		Average value: 0.200 Grade Count:1
 0.200 - 0.200
@Time 299 - 299 sec		0.200 - 0.200
@Time 0.0830 - 0.0830 hour		Average value: 0.200 Grade Count:1
Linear Mold Shrinkage 0.00100 - 0.0200 cm/cm0.00100 - 0.0200 in/inAverage value: 0.00603 cm/cm Grade Count:235
 0.00400 - 0.00400 cm/cm
@Temperature 80.0 - 80.0 °C		0.00400 - 0.00400 in/in
@Temperature 176 - 176 °F		Average value: 0.00367 cm/cm Grade Count:2
 0.00300 - 0.00400 cm/cm
@Temperature 260 - 260 °C		0.00300 - 0.00400 in/in
@Temperature 500 - 500 °F		Average value: 0.00367 cm/cm Grade Count:2
 0.00300 - 0.00400 cm/cm
@Pressure 60.0 - 60.0 MPa		0.00300 - 0.00400 in/in
@Pressure 8700 - 8700 psi		Average value: 0.00367 cm/cm Grade Count:2
Linear Mold Shrinkage, Transverse 0.00100 - 0.0180 cm/cm0.00100 - 0.0180 in/inAverage value: 0.0107 cm/cm Grade Count:95
 0.0110 - 0.0120 cm/cm
@Temperature 80.0 - 80.0 °C		0.0110 - 0.0120 in/in
@Temperature 176 - 176 °F		Average value: 0.0108 cm/cm Grade Count:2
 0.0100 - 0.0110 cm/cm
@Temperature 260 - 260 °C		0.0100 - 0.0110 in/in
@Temperature 500 - 500 °F		Average value: 0.0108 cm/cm Grade Count:2
 0.0100 - 0.0110 cm/cm
@Pressure 60.0 - 60.0 MPa		0.0100 - 0.0110 in/in
@Pressure 8700 - 8700 psi		Average value: 0.0108 cm/cm Grade Count:2
Melt Flow 2.00 - 58.0 g/10 min2.00 - 58.0 g/10 minAverage value: 22.4 g/10 min Grade Count:120
Spiral Flow 36.0 - 43.0 cm14.2 - 16.9 inAverage value: 39.7 cm Grade Count:3
Ash 13.0 - 24.0 %13.0 - 24.0 %Average value: 17.4 % Grade Count:10
 15.0 - 15.0 %
@Temperature 625 - 625 °C		15.0 - 15.0 %
@Temperature 1160 - 1160 °F		Average value: 15.0 % Grade Count:1
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell M 70.0 - 10970.0 - 109Average value: 90.2 Grade Count:42
Hardness, Rockwell R 90.0 - 12090.0 - 120Average value: 115 Grade Count:33
Ball Indentation Hardness 128 - 200 MPa18600 - 29000 psiAverage value: 167 MPa Grade Count:11
Tensile Strength, Ultimate 47.0 - 140 MPa6820 - 20300 psiAverage value: 99.8 MPa Grade Count:268
 40.0 - 165 MPa
@Temperature -40.0 - 150 °C		5800 - 23900 psi
@Temperature -40.0 - 302 °F		Average value: 79.0 MPa Grade Count:8
Tensile Strength, Yield 62.1 - 125 MPa9000 - 18100 psiAverage value: 96.9 MPa Grade Count:80
Elongation at Break 1.00 - 155 %1.00 - 155 %Average value: 5.03 % Grade Count:285
 1.90 - 6.30 %
@Temperature 0.000 - 150 °C		1.90 - 6.30 %
@Temperature 32.0 - 302 °F		Average value: 4.37 % Grade Count:5
Elongation at Yield 2.00 - 115 %2.00 - 115 %Average value: 11.9 % Grade Count:9
Modulus of Elasticity 3.50 - 14.0 GPa508 - 2030 ksiAverage value: 6.58 GPa Grade Count:179
 2.06843 - 6.41212 GPa
@Temperature -40.0 - 150 °C		300.005 - 930.014 ksi
@Temperature -40.0 - 302 °F		Average value: 4.22 GPa Grade Count:5
Flexural Yield Strength 86.0 - 190 MPa12500 - 27600 psiAverage value: 152 MPa Grade Count:241
 80.0 - 80.0 MPa
@Temperature 90.0 - 90.0 °C		11600 - 11600 psi
@Temperature 194 - 194 °F		Average value: 80.0 MPa Grade Count:1
Flexural Modulus 3.20 - 10.0 GPa464 - 1450 ksiAverage value: 5.66 GPa Grade Count:245
 3.50 - 5.00 GPa
@Temperature 60.0 - 120 °C		508 - 725 ksi
@Temperature 140 - 248 °F		Average value: 4.03 GPa Grade Count:2
Flexural Strain at Break 3.00 - 4.50 %3.00 - 4.50 %Average value: 3.54 % Grade Count:5
Flexural Strain at Yield 3.70 - 4.40 %3.70 - 4.40 %Average value: 4.06 % Grade Count:5
Poissons Ratio 0.340 - 0.3700.340 - 0.370Average value: 0.351 Grade Count:14
Izod Impact 50.0 J36.9 ft-lbAverage value: 50.0 J Grade Count:3
 50.0 - 50.0 J
@Temperature -30.0 - 0.000 °C		36.9 - 36.9 ft-lb
@Temperature -22.0 - 32.0 °F		Average value: 50.0 J Grade Count:3
Izod Impact, Notched 0.267 - 1.60 J/cm0.500 - 3.00 ft-lb/inAverage value: 0.634 J/cm Grade Count:134
 0.430 - 0.600 J/cm
@Temperature -40.0 - -20.0 °C		0.806 - 1.12 ft-lb/in
@Temperature -40.0 - -4.00 °F		Average value: 0.570 J/cm Grade Count:5
Izod Impact, Unnotched 0.588 - 8.17 J/cm1.10 - 15.3 ft-lb/inAverage value: 5.37 J/cm Grade Count:20
 3.30 - 3.60 J/cm
@Temperature -30.0 - -30.0 °C		6.18 - 6.74 ft-lb/in
@Temperature -22.0 - -22.0 °F		Average value: 3.52 J/cm Grade Count:4
Izod Impact, Notched (ISO) 3.50 - 60.0 kJ/m²1.67 - 28.6 ft-lb/in²Average value: 8.25 kJ/m² Grade Count:85
 4.00 - 10.0 kJ/m²
@Temperature -40.0 - 30.0 °C		1.90 - 4.76 ft-lb/in²
@Temperature -40.0 - 86.0 °F		Average value: 7.18 kJ/m² Grade Count:26
Izod Impact, Unnotched (ISO) 12.2 - 65.0 kJ/m²5.81 - 30.9 ft-lb/in²Average value: 44.0 kJ/m² Grade Count:41
 10.5 - 55.0 kJ/m²
@Temperature -40.0 - 30.0 °C		5.00 - 26.2 ft-lb/in²
@Temperature -40.0 - 86.0 °F		Average value: 33.5 kJ/m² Grade Count:18
Charpy Impact Unnotched 0.450 - 6.90 J/cm²2.14 - 32.8 ft-lb/in²Average value: 4.32 J/cm² Grade Count:121
 1.39 - 6.50 J/cm²
@Temperature -40.0 - -20.0 °C		6.62 - 30.9 ft-lb/in²
@Temperature -40.0 - -4.00 °F		Average value: 3.77 J/cm² Grade Count:73
Charpy Impact, Notched 0.350 - 2.00 J/cm²1.67 - 9.52 ft-lb/in²Average value: 0.737 J/cm² Grade Count:167
 0.300 - 1.00 J/cm²
@Temperature -40.0 - -20.0 °C		1.43 - 4.76 ft-lb/in²
@Temperature -40.0 - -4.00 °F		Average value: 0.690 J/cm² Grade Count:76
Dart Drop, Total Energy 5.00 J3.69 ft-lbAverage value: 5.00 J Grade Count:3
Coefficient of Friction 0.150 - 0.2000.150 - 0.200Average value: 0.174 Grade Count:4
Tensile Creep Modulus, 1 hour 3500 - 7300 MPa508000 - 1.06e+6 psiAverage value: 5600 MPa Grade Count:11
Tensile Creep Modulus, 1000 hours 2400 - 6900 MPa348000 - 1.00e+6 psiAverage value: 4510 MPa Grade Count:12
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 1.00e+13 - 1.00e+17 ohm-cm1.00e+13 - 1.00e+17 ohm-cmAverage value: 1.44e+16 ohm-cm Grade Count:173
Surface Resistance 120 - 3.00e+17 ohm120 - 3.00e+17 ohmAverage value: 1.02e+16 ohm Grade Count:103
Dielectric Constant 2.70 - 5.202.70 - 5.20Average value: 3.63 Grade Count:119
Dielectric Strength 14.0 - 100 kV/mm356 - 2540 kV/inAverage value: 24.8 kV/mm Grade Count:157
Dissipation Factor 0.000700 - 0.1500.000700 - 0.150Average value: 0.0167 Grade Count:87
Dielectric Loss Index 0.00200 - 0.02000.00200 - 0.0200Average value: 0.0187 Grade Count:14
Arc Resistance 0.000 - 180 sec0.000 - 180 secAverage value: 111 sec Grade Count:30
Comparative Tracking Index 125 - 600 V125 - 600 VAverage value: 330 V Grade Count:120
Hot Wire Ignition, HWI 7.00 - 120 sec7.00 - 120 secAverage value: 36.4 sec Grade Count:8
High Amp Arc Ignition, HAI 30.0 - 120 arcs30.0 - 120 arcsAverage value: 112 arcs Grade Count:8
High Voltage Arc-Tracking Rate, HVTR 25.4 - 150 mm/min1.00 - 5.91 in/minAverage value: 99.5 mm/min Grade Count:5
 
Thermal PropertiesMetricEnglishComments
CTE, linear 20.0 - 110 µm/m-°C11.1 - 61.1 µin/in-°FAverage value: 40.4 µm/m-°C Grade Count:117
 30.0 - 30.0 µm/m-°C
@Temperature 50.0 - 120 °C		16.7 - 16.7 µin/in-°F
@Temperature 122 - 248 °F		Average value: 30.0 µm/m-°C Grade Count:1
CTE, linear, Transverse to Flow 61.0 - 173 µm/m-°C33.9 - 96.1 µin/in-°FAverage value: 99.7 µm/m-°C Grade Count:68
 150 - 150 µm/m-°C
@Temperature 50.0 - 120 °C		83.3 - 83.3 µin/in-°F
@Temperature 122 - 248 °F		Average value: 150 µm/m-°C Grade Count:1
Specific Heat Capacity 1.50 - 1.84 J/g-°C0.359 - 0.440 BTU/lb-°FAverage value: 1.67 J/g-°C Grade Count:6
 1.85 - 1.90 J/g-°C
@Temperature 205 - 250 °C		0.442 - 0.454 BTU/lb-°F
@Temperature 401 - 482 °F		Average value: 1.87 J/g-°C Grade Count:5
Thermal Conductivity 0.150 - 0.280 W/m-K1.04 - 1.94 BTU-in/hr-ft²-°FAverage value: 0.217 W/m-K Grade Count:9
 0.240 - 0.260 W/m-K
@Temperature 205 - 250 °C		1.67 - 1.80 BTU-in/hr-ft²-°F
@Temperature 401 - 482 °F		Average value: 0.248 W/m-K Grade Count:5
Melting Point 178 - 255 °C352 - 491 °FAverage value: 224 °C Grade Count:158
Maximum Service Temperature, Air 75.0 - 330 °C167 - 626 °FAverage value: 167 °C Grade Count:28
Hot Ball Pressure Test 125 - 215 °C257 - 419 °FAverage value: 159 °C Grade Count:5
Deflection Temperature at 0.46 MPa (66 psi) 99.0 - 230 °C210 - 446 °FAverage value: 213 °C Grade Count:217
Deflection Temperature at 1.8 MPa (264 psi) 65.0 - 220 °C149 - 428 °FAverage value: 194 °C Grade Count:299
Deflection Temperature at 8.0 MPa 65.0 - 140 °C149 - 284 °FAverage value: 94.4 °C Grade Count:16
Vicat Softening Point 128 - 220 °C262 - 428 °FAverage value: 206 °C Grade Count:74
Glass Transition Temp, Tg 44.0 - 65.0 °C111 - 149 °FAverage value: 57.5 °C Grade Count:23
UL RTI, Electrical 50.0 - 140 °C122 - 284 °FAverage value: 127 °C Grade Count:13
UL RTI, Mechanical with Impact 50.0 - 140 °C122 - 284 °FAverage value: 121 °C Grade Count:13
UL RTI, Mechanical without Impact 50.0 - 140 °C122 - 284 °FAverage value: 124 °C Grade Count:13
Flammability, UL94 HB - 5VAHB - 5VAGrade Count:292
Flame Spread 24.0 - 100 mm/min0.945 - 3.94 in/minAverage value: 45.5 mm/min Grade Count:12
Oxygen Index 19.0 - 35.0 %19.0 - 35.0 %Average value: 24.7 % Grade Count:37
Glow Wire Test 650 - 960 °C1200 - 1760 °FAverage value: 802 °C Grade Count:53
 
Processing PropertiesMetricEnglishComments
Processing Temperature 20.0 - 275 °C68.0 - 527 °FAverage value: 184 °C Grade Count:51
Nozzle Temperature 225 - 270 °C437 - 518 °FAverage value: 250 °C Grade Count:55
Die Temperature 240 - 275 °C464 - 527 °FAverage value: 257 °C Grade Count:22
Melt Temperature 203 - 280 °C397 - 536 °FAverage value: 250 °C Grade Count:159
Mold Temperature 30.0 - 130 °C86.0 - 266 °FAverage value: 79.9 °C Grade Count:174
Injection Velocity 70.0 - 300 mm/sec2.76 - 11.8 in/secAverage value: 261 mm/sec Grade Count:16
Drying Temperature 80.0 - 140 °C176 - 284 °FAverage value: 118 °C Grade Count:141
Moisture Content 0.000 - 0.400 %0.000 - 0.400 %Average value: 0.0417 % Grade Count:86
Dew Point -40.0 - -28.9 °C-40.0 - -20.0 °FAverage value: -29.8 °C Grade Count:12
Injection Pressure 3.50 - 120 MPa508 - 17400 psiAverage value: 80.9 MPa Grade Count:45
Vent Depth 0.00127 - 0.00381 cm0.000500 - 0.00150 inAverage value: 0.00154 cm Grade Count:7
Hot-Working Temperature 250 - 260 °C482 - 500 °FAverage value: 255 °C Grade Count:5
Precipitation Temperature 40.0 - 60.0 °C104 - 140 °FAverage value: 50.0 °C Grade Count:3

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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