Overview of materials for High Density Polyethylene (HDPE), Ultra High Molecular Weight
Categories: Polymer; Thermoplastic; Polyethylene (PE); High Density (HDPE); UHMW PE (Ultra High Molecular Weight PE)

Material Notes: This property data is a summary of similar materials in the MatWeb database for the category "High Density Polyethylene (HDPE), Ultra High Molecular Weight". 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 0.800 - 1.80 g/cc0.0289 - 0.0650 lb/in³Average value: 0.952 g/cc Grade Count:292
Water Absorption 0.000 - 1.50 %0.000 - 1.50 %Average value: 0.0404 % Grade Count:104
Moisture Absorption at Equilibrium 0.000 - 0.100 %0.000 - 0.100 %Average value: 0.0178 % Grade Count:63
Water Absorption at Saturation 0.000 - 0.500 %0.000 - 0.500 %Average value: 0.0510 % Grade Count:29
Particle Size 10.0 - 710 µm10.0 - 710 µmAverage value: 186 µm Grade Count:20
Viscosity Test 470 - 4300 cm³/g4.70 - 43.0 dl/gAverage value: 2530 cm³/g Grade Count:21
Environmental Stress Crack Resistance 300 - 600 hour300 - 600 hourAverage value: 500 hour Grade Count:3
 >= 600 hour
@Temperature 50.0 - 50.0 °C
>= 600 hour
@Temperature 122 - 122 °F
Average value: 700 hour Grade Count:4
Oxidative Induction Time (OIT) >= 50.0 min
@Temperature 210 - 210 °C
>= 50.0 min
@Temperature 410 - 410 °F
Average value: 50.0 min Grade Count:1
Molecular Weight 300000 - 9.50e+6 g/mol300000 - 9.50e+6 g/molAverage value: 6.27e+6 g/mol Grade Count:111
Melt Flow 0.0400 - 12.0 g/10 min0.0400 - 12.0 g/10 minAverage value: 2.86 g/10 min Grade Count:22
Ash 0.0000550 - 0.00400 %0.0000550 - 0.00400 %Average value: 0.000882 % Grade Count:3
Surface Tension 55.0 dynes/cm55.0 dynes/cmAverage value: 55.0 dynes/cm Grade Count:6
 
Mechanical PropertiesMetricEnglishComments
Hardness, Rockwell R 49.0 - 70.049.0 - 70.0Average value: 62.1 Grade Count:7
Hardness, Shore D 54.0 - 12054.0 - 120Average value: 63.5 Grade Count:265
Ball Indentation Hardness 30.0 - 57.0 MPa4350 - 8270 psiAverage value: 38.3 MPa Grade Count:101
Tensile Strength, Ultimate 14.0 - 700 MPa2030 - 102000 psiAverage value: 32.5 MPa Grade Count:141
 35.0 - 35.0 MPa
@Temperature 32.0 - 32.0 °C
5080 - 5080 psi
@Temperature 89.6 - 89.6 °F
Average value: 35.0 MPa Grade Count:1
Tensile Strength, Yield 11.6 - 40.0 MPa1680 - 5800 psiAverage value: 19.5 MPa Grade Count:200
Elongation at Break 3.50 - 800 %3.50 - 800 %Average value: 244 % Grade Count:241
Elongation at Yield 8.00 - 350 %8.00 - 350 %Average value: 26.6 % Grade Count:51
Creep Strength 3.20 - 13.0 MPa464 - 1890 psiAverage value: 9.70 MPa Grade Count:28
Modulus of Elasticity 0.300 - 1.10 GPa43.5 - 160 ksiAverage value: 0.730 GPa Grade Count:180
Flexural Yield Strength 11.0 - 40.0 MPa1600 - 5800 psiAverage value: 19.3 MPa Grade Count:37
Flexural Modulus 0.0158 - 1.45 GPa2.29 - 210 ksiAverage value: 0.970 GPa Grade Count:21
Compressive Yield Strength 4.00 - 82.7 MPa580 - 12000 psiAverage value: 12.4 MPa Grade Count:55
Shear Strength 18.0 - 4800 MPa2610 - 696000 psiAverage value: 624 MPa Grade Count:16
Secant Modulus 0.00100 - 0.760 GPa0.145 - 110 ksiAverage value: 0.461 GPa Grade Count:15
Izod Impact, Notched 2.67 - 5340 J/cm5.00 - 10000 ft-lb/inAverage value: 7.88 J/cm Grade Count:25
Izod Impact, Unnotched 0.641 J/cm - NB1.20 ft-lb/in - NBAverage value: 0.641 J/cm Grade Count:6
 5338.47 - 5338.47 J/cm
@Temperature -40.0 - -40.0 °C
10001.1 - 10001.1 ft-lb/in
@Temperature -40.0 - -40.0 °F
Grade Count:1
Izod Impact, Notched (ISO) 8.00 - 100000 kJ/m²3.81 - 47600 ft-lb/in²Average value: 97.9 kJ/m² Grade Count:91
Charpy Impact Unnotched 1.00 J/cm² - NB4.76 ft-lb/in² - NBAverage value: 3.77 J/cm² Grade Count:19
Charpy Impact, Notched 1.50 - 1000 J/cm²7.14 - 4760 ft-lb/in²Average value: 13.3 J/cm² Grade Count:120
 3.00 - 3.00 J/cm²
@Temperature -20.0 - -20.0 °C
14.3 - 14.3 ft-lb/in²
@Temperature -4.00 - -4.00 °F
Average value: 3.00 J/cm² Grade Count:1
Tensile Impact Strength 206 - 2870 kJ/m²97.9 - 1370 ft-lb/in²Average value: 1310 kJ/m² Grade Count:11
Coefficient of Friction 0.0200 - 0.3500.0200 - 0.350Average value: 0.142 Grade Count:178
Coefficient of Friction, Static 0.100 - 0.3000.100 - 0.300Average value: 0.163 Grade Count:99
Tensile Creep Modulus, 1 hour 370 - 550 MPa53700 - 79800 psiAverage value: 459 MPa Grade Count:8
Tensile Creep Modulus, 1000 hours 180 - 300 MPa26100 - 43500 psiAverage value: 238 MPa Grade Count:8
K Factor (Wear Factor) 70.0 - 11070.0 - 110Average value: 88.3 Grade Count:6
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 100 - 1.00e+18 ohm-cm100 - 1.00e+18 ohm-cmAverage value: 9.01e+15 ohm-cm Grade Count:205
Surface Resistance 100 - 1.00e+17 ohm100 - 1.00e+17 ohmAverage value: 2.85e+15 ohm Grade Count:225
Dielectric Constant 2.10 - 3.002.10 - 3.00Average value: 2.44 Grade Count:71
Dielectric Strength 1.90 - 100 kV/mm48.3 - 2540 kV/inAverage value: 49.9 kV/mm Grade Count:103
Dissipation Factor 0.000100 - 0.005000.000100 - 0.00500Average value: 0.000504 Grade Count:47
Dielectric Loss Index 0.000100 - 0.001000.000100 - 0.00100Average value: 0.000407 Grade Count:8
Arc Resistance 180 - 240 sec180 - 240 secAverage value: 210 sec Grade Count:3
Comparative Tracking Index 600 V600 VAverage value: 600 V Grade Count:30
 
Thermal PropertiesMetricEnglishComments
CTE, linear 15.0 - 360 µm/m-°C8.33 - 200 µin/in-°FAverage value: 162 µm/m-°C Grade Count:256
 150 - 150 µm/m-°C
@Temperature 30.0 - 100 °C
83.3 - 83.3 µin/in-°F
@Temperature 86.0 - 212 °F
Average value: 150 µm/m-°C Grade Count:1
Specific Heat Capacity 0.400 - 2.30 J/g-°C0.0956 - 0.550 BTU/lb-°FAverage value: 1.82 J/g-°C Grade Count:71
Thermal Conductivity 0.300 - 4.00 W/m-K2.08 - 27.8 BTU-in/hr-ft²-°FAverage value: 0.426 W/m-K Grade Count:166
Melting Point 127 - 255 °C260 - 491 °FAverage value: 135 °C Grade Count:222
Maximum Service Temperature, Air 45.0 - 135 °C113 - 275 °FAverage value: 86.3 °C Grade Count:205
Deflection Temperature at 0.46 MPa (66 psi) 65.0 - 95.0 °C149 - 203 °FAverage value: 73.5 °C Grade Count:19
Deflection Temperature at 1.8 MPa (264 psi) 28.9 - 78.9 °C84.0 - 174 °FAverage value: 45.3 °C Grade Count:56
Vicat Softening Point 67.0 - 136 °C153 - 277 °FAverage value: 80.9 °C Grade Count:85
Minimum Service Temperature, Air -269 - -30.0 °C-452 - -22.0 °FAverage value: -184 °C Grade Count:139
Brittleness Temperature -91.0 - -70.0 °C-132 - -94.0 °FAverage value: -84.8 °C Grade Count:6
Glass Transition Temp, Tg -120 °C-184 °FAverage value: -120 °C Grade Count:13
Flammability, UL94 HB - V-0HB - V-0Grade Count:164
 
Processing PropertiesMetricEnglishComments
Processing Temperature 154 - 268 °C309 - 514 °FAverage value: 209 °C Grade Count:11

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