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 - 1.45 g/cc0.0289 - 0.0524 lb/in³Average value: 0.951 g/cc Grade Count:230
Water Absorption 0.000 - 2.30 %0.000 - 2.30 %Average value: 0.0450 % Grade Count:101
Moisture Absorption at Equilibrium 0.000 - 0.100 %0.000 - 0.100 %Average value: 0.0192 % Grade Count:59
Water Absorption at Saturation 0.000 - 0.500 %0.000 - 0.500 %Average value: 0.0321 % Grade Count:58
Particle Size 10.0 - 710 µm10.0 - 710 µmAverage value: 176 µm Grade Count:16
Viscosity Test 470 - 4300 cm³/g4.70 - 43.0 dl/gAverage value: 2500 cm³/g Grade Count:17
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 - 9.20e+6 g/mol300000 - 9.20e+6 g/molAverage value: 6.04e+6 g/mol Grade Count:69
Melt Flow 0.100 - 12.0 g/10 min0.100 - 12.0 g/10 minAverage value: 3.08 g/10 min Grade Count:18
Surface Tension 55.0 dynes/cm55.0 dynes/cmAverage value: 55.0 dynes/cm Grade Count:6
 
Mechanical PropertiesMetricEnglishComments
Hardness, Shore D 57.0 - 12057.0 - 120Average value: 64.1 Grade Count:210
Ball Indentation Hardness 30.0 - 57.0 MPa4350 - 8270 psiAverage value: 39.5 MPa Grade Count:72
Tensile Strength, Ultimate 14.0 - 700 MPa2030 - 102000 psiAverage value: 35.9 MPa Grade Count:114
 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 0.130 - 40.0 MPa18.9 - 5800 psiAverage value: 19.1 MPa Grade Count:140
Elongation at Break 3.50 - 800 %3.50 - 800 %Average value: 238 % Grade Count:210
Elongation at Yield 8.00 - 350 %8.00 - 350 %Average value: 39.1 % Grade Count:19
Creep Strength 3.20 - 13.0 MPa464 - 1890 psiAverage value: 9.74 MPa Grade Count:29
Modulus of Elasticity 0.300 - 750 GPa43.5 - 109000 ksiAverage value: 18.7 GPa Grade Count:156
Flexural Yield Strength 13.8 - 40.0 MPa2000 - 5800 psiAverage value: 22.5 MPa Grade Count:42
Flexural Modulus 0.400 - 1.45 GPa58.0 - 210 ksiAverage value: 0.795 GPa Grade Count:42
 0.641212 - 0.641212 GPa
@Temperature 73.0 - 73.0 °C
93.0014 - 93.0014 ksi
@Temperature 163 - 163 °F
Average value: 0.641 GPa Grade Count:1
Compressive Yield Strength 4.00 - 82.7 MPa580 - 12000 psiAverage value: 17.2 MPa Grade Count:56
Compressive Modulus 0.290 - 0.689 GPa42.0 - 100 ksiAverage value: 0.551 GPa Grade Count:30
Shear Strength 33.1 MPa4800 psiAverage value: 33.1 MPa Grade Count:11
Secant Modulus 0.00100 GPa0.145 ksiAverage value: 0.00100 GPa Grade Count:4
Izod Impact, Notched 2.67 - 5340 J/cm5.00 - 10000 ft-lb/inAverage value: 10.7 J/cm Grade Count:38
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: 85.4 kJ/m² Grade Count:51
Charpy Impact Unnotched 1.00 J/cm² - NB4.76 ft-lb/in² - NBAverage value: 3.77 J/cm² Grade Count:17
Charpy Impact, Notched 2.50 - 1000 J/cm²11.9 - 4760 ft-lb/in²Average value: 12.0 J/cm² Grade Count:83
 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
Coefficient of Friction 0.0200 - 0.3500.0200 - 0.350Average value: 0.144 Grade Count:154
Coefficient of Friction, Static 0.100 - 0.2500.100 - 0.250Average value: 0.154 Grade Count:48
Tensile Creep Modulus, 1 hour 370 - 550 MPa53700 - 79800 psiAverage value: 446 MPa Grade Count:7
Tensile Creep Modulus, 1000 hours 180 - 270 MPa26100 - 39200 psiAverage value: 229 MPa Grade Count:7
K Factor (Wear Factor) 1.00e-9 - 1101.00e-9 - 110Average value: 75.7 Grade Count:7
Limiting Pressure Velocity 0.0500 - 0.210 MPa-m/sec1430 - 6000 psi-ft/minAverage value: 0.108 MPa-m/sec Grade Count:28
Compression Set 1.10 - 1.60 %
@Temperature 80.0 - 80.0 °C
1.10 - 1.60 %
@Temperature 176 - 176 °F
Average value: 1.35 % Grade Count:1
 
Electrical PropertiesMetricEnglishComments
Electrical Resistivity 100 - 1.00e+18 ohm-cm100 - 1.00e+18 ohm-cmAverage value: 8.01e+15 ohm-cm Grade Count:151
Surface Resistance 100 - 1.00e+16 ohm100 - 1.00e+16 ohmAverage value: 1.55e+14 ohm Grade Count:165
Dielectric Constant 2.10 - 3.002.10 - 3.00Average value: 2.45 Grade Count:62
Dielectric Strength 1.90 - 100 kV/mm48.3 - 2540 kV/inAverage value: 50.5 kV/mm Grade Count:99
Dissipation Factor 0.000100 - 0.001000.000100 - 0.00100Average value: 0.000408 Grade Count:42
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:31
 
Thermal PropertiesMetricEnglishComments
CTE, linear 20.0 - 360 µm/m-°C11.1 - 200 µin/in-°FAverage value: 194 µm/m-°C Grade Count:194
 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:70
Thermal Conductivity 0.300 - 4.00 W/m-K2.08 - 27.8 BTU-in/hr-ft²-°FAverage value: 0.437 W/m-K Grade Count:116
Melting Point 127 - 255 °C260 - 491 °FAverage value: 135 °C Grade Count:182
Maximum Service Temperature, Air 45.0 - 135 °C113 - 275 °FAverage value: 85.7 °C Grade Count:186
Deflection Temperature at 0.46 MPa (66 psi) 65.0 - 95.0 °C149 - 203 °FAverage value: 73.5 °C Grade Count:17
Deflection Temperature at 1.8 MPa (264 psi) 42.0 - 78.9 °C108 - 174 °FAverage value: 45.6 °C Grade Count:55
Vicat Softening Point 67.0 - 136 °C153 - 277 °FAverage value: 81.0 °C Grade Count:82
Minimum Service Temperature, Air -269 - -30.0 °C-452 - -22.0 °FAverage value: -189 °C Grade Count:105
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:154
 
Processing PropertiesMetricEnglishComments
Processing Temperature 154 - 268 °C309 - 514 °FAverage value: 209 °C Grade Count:11

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