HDPE 300 - High Density Polyethylene

Excellent price/performance ratio

HDPE 300 is a crystalline thermoplastic and belongs to the group of polyolefins. The well-known black version of HDPE 300 pipe is resistant to sunlight (UV radiation) and other weather influences and can therefore be used permanently outdoors. HDPE 300 does not absorb moisture, is moisture repellent and can be used at temperatures from -30°C to +80°C.

The plastic Polyethylene has an apolar surface and can therefore not be glued. Thanks to its excellent price-quality ratio, HDPE 300 is one of the most widely used plastics in the industry.

HDPE 300 is Polyethylene with a molecular weight between 930 to 970 kg/m3 and is therefore known as High Density Polyethylene. 

HDPE 300 in our webshop

Unique features

  • Very good welding and processing properties
  • Good chemical resistance
  • Good mechanical properties


  • Chemical engineering
  • Corrosion protection
  • Food production
  • Tank building
  • Water treatment
  • Fish farms
  • Equipment construction
  • Orthopedic applications

Machining options

  • Machining (routing, turning, milling)
  • Welding
  • Water jet cutting
  • Laser cutting
  • Warm bending
  • Gluing
  • Thermoforming
  • Yes
  • No
  • Not in all cases

HDPE 300 welding

HDPE 300 can be easily welded. Firstly, the material is suitable for infrared welding. In addition, HDPE 300 is good for wire welding. The air volume (L/min) is 45-55, the welding air Temp. 300-340ºC (measured approx. 5mm in the welding nozzle) the welding speed cm/min is 25-35. HDPE 300 is also good for extrusion welding. The welding parameters here are: air volume (L/min) 300, welding air Temp. 210-230ºC and the welding mass Temp. 250-300ºC. 

PE100-RC is easy to electroweld and PE100/PE100-RC are also very suitable for socket welding/mirror welding.

Main technical properties of HDPE 300

HDPE 300 is a fairly soft plastic, which makes it scratch-sensitive. When you ignite HDPE 300 you can identify the material by the blue flame, yellow top and white smoke. 

The specific gravity is less than 1, which makes HDPE 300 float.

How to identify HDPE 300

HDPE 300 is a very tough and strong material with a temperature range of up to 80 degrees. The black version is UV-resistant and therefore suitable for permanent outdoor applications.

The chemical resistance and food suitability make HDPE 300 one of the most widely used plastics.

HDPE 300 is excellent to weld and suitable for storage tanks and piping. 

HDPE 300 per sector

HDPE 300 Industrial Plastics

Play-Tec® - for play areas
A long-lasting, low-maintenance material that’s highly resistant to rain, sun, wind and dirt, with little to no fading.

Polystone G® - for numerous applications
Suitable for a wide range of industrial applications and approved in many countries for chemical engineering and tank building.

Polystone G® CubX® - for tank construction
A unique cross-ribbed twinwall sheet with internal cubiform cell structure.  Its interior consists of a homogeneous, orthogonal grid pattern welded on the outside to two sheets, which form the surface of the sheet. It is resistant to stress cracking and UV light and suitable for outdoor use. 

HDPE 300 Engineering Plastics

The slightly greasy feeling HDPE 300 is moisture repellent and UV and weather resistant due to the addition of soot (black colour). Due to the excellent price/performance ratio, PE with PVC and PP is the most widely used plastic in the industry.

In addition, HDPE 300 is approved for contact with food, which is essential in, for example, the canning industry, food, meat and fish processing plants or other applications where non-toxic behaviour, environment and hygiene are important.

We have extensive certificates (BGA and FDA). You can request this by contacting us.

Applications of HDPE 300

  • Water treatment sector
  • Fish farms
  • Tank construction, equipment construction
  • Food industry
  • Orthopedic Applications


HDPE 300

Technical information

  • General
    Definition Norm Unit Value
    Density ISO 1183 g/cm³ 0.95
    Moisture absorption in normal climate 0.05
    Fire rating DIN 4102 B 2
    Specific heat capacity kj/Kg°C 2.5
  • Mechanical
    Definition Norm Unit Value
    Tensile strength DIN 53455 N/mm 22
    Elongation to break DIN 53455 >500
    E-Module DIN 53457 (23°C) N/mm²  800
    Bending strength DIN 53452 N/mm²  25
    Impact strength DIN 53453 (23°C) Charpy 12
    Shore or ball pressure hardness Shore °D 63
    Coefficient of friction 0.25
  • Electrical
    Definition Norm Unit Value
    Relative electrical constant DIN 53485 (100Hz) 100 Hz 2.3
    Dielectric loss factor DIN 53483 (100Hz) tan (..x10-³ 0.0002
    Specific resistance DIN 53482 16 cm >10
    Surface resistance DIN 53482 13 >10
    Creep current resistance DIN 53480 KC >600
    Breakdown voltage DIN 53481 kV/mm 50
  • Thermal
    Definition Norm Unit Value
    Crystalline melting point °C 126-135
    Heat conductivity DIN 52162 W/m°K 0.38
    Linear coefficient of expansion DIN 53762 mm/m°C 0.18
    Long-term no-load operating temperature °C -50 / 80
    Maximum short-term operating temperature °C 100
    Heat deformation Tue 53461 °C 48
  • Temperature range (tbc)
    Minimum temperature Maximum temperature
     -50°C  +80°C

Machining data

  • Circular sawing
    Clearance angle (α) 10 - 15 [o]
    Rake angle (λ) 0 - 15 [o]
    Cutting speed 2000 - 4000 [m/min]
    Tooth pitch 2 - 8 [mm]
  • Band sawing
    Clearance angle (α) 30 - 40 [o]
    rake angle (λ) 0 - 10 [o]
    Cutting speed 500 - 1500 [m/min]
    Tooth pitch 2 - 8 [mm]
  • Drilling
    Clearance angle (α) 10 - 15 [o]
    Rake angle (λ) 0 [o]
    Top angle (φ) 80 - 110 [o]
    Cutting speed 50 - 100 [m/min]
    Start 0.2 - 0.4 [mm/rev]
  • Turning
    Clearance angle (α) 5 - 15 [o]
    rake angle (λ) 0 - 15 [o]
    Setting angle (χ) 45 - 60 [o]
    Cutting speed 200 - 500 [m/min]
    Start 0.1 - 0.5 [mm]
  • Milling
    Clearance angle (α) 5 - 15 [o]
    Rake angle (λ) <15 [o]
    Cutting speed <1000 [m/min]
    Start 0.1 - 0.5 [mm/rev]