Hostalen 4731B



Hostalen 4731 B is a high density polyethylene (HDPE) with high melt viscosity for extrusion. The product provides excellent stress crack resistance properties (ESCR) combined with very good long term hydrostatic strength, high heat- and extremely high extraction stability. Hostalen 4731 B fullfills the requirements of DIN 16833 / ISO 24033 for PE-RT, Typ II. Typical customer applications are underfloor heating and multilayer pipes for heating and plumbing.


Africa-Middle East, Asia-Pacific, Europe, North America, South & Central America


SDS - Safety Data Sheet
PSB - Product Stewardship Bulletin

Product Data and Technical Information

Typical Properties

Melt Flow Rate (190 °C/5.0 kg) 0.45 g/10 min
Melt Flow Rate (190 °C/21.6 kg) 9.5 g/10 min
Density 0.947 g/cm³
Tensile Modulus (23 °C) 850 MPa
Tensile Stress at Yield (23 °C, 50 mm/min) 22 MPa
Tensile Strain at Break (23 °C) 650 %
Tensile Strain at Yield (23 °C, 50 mm/min) 8 %
MRS Classification 10 MPa
FNCT (4.0 MPa, 2% Arkopal N100, 80 °C) >=350 hr
Charpy Impact Strength - Notched (23 °C) 24 kJ/m²
Charpy Impact Strength - Notched (-30 °C) 8 kJ/m²
Shore Hardness (Shore D, 3 sec) 59
Vicat Softening Temperature (A50) 120 °C
Vicat Softening Temperature (B50) 70 °C
Oxidation Induction Time (210 °C) 40 min

Technical Data Sheet

Technical Data Sheet


Pipe, Sheet


High Density Polyethylene


Drinking Water Pipe, Plumbing, Heating & Cooling