Plastic HDPE

Plastic HDPE strength, stiffness, density and thermal properties, with their source.

A bracket in Plastic HDPE, smooth finish.

Mechanical
Process	Bulk polymer (molded or machined)
Yield strength	24MPasourcetypical, tensile stress at yield 23 °C, 50 mm/min ISO 527
Ultimate tensile strength	not sourced
Elongation at break	not sourced
Young's modulus (stiffness)	0.9GPasourcetypical, tensile modulus 23 °C ISO 527
Density	950kg/m³sourcetypical, ISO 1183
Strength to weight	25.3kN·m/kg
Stiffness to weight	0.947MN·m/kg
Poisson's ratio	0.4–0.45sourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE)
Shear modulus	0.316GPa
Bulk modulus	2GPa
Speed of sound	973m/s
Thermal
Thermal conductivity	0.4–0.49W/m·Ksourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE)
Thermal expansion	120µm/m·Ksourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE)
100 mm part over a 50 °C swing	600µm growth
Specific heat	2,250J/kg·Ksourcebase material: high-density polyethylene family (INEOS Olefins & Polymers USA, Typical Engineering Properties of HDPE)
Heats up and cools (diffusivity)	0.208mm²/s
Thermal shock resistance	56.9W/m
Values for	LyondellBasell Hostalen 23050 B high density polyethylene, typical ISO values

Among 59 materials

Stiffness against density

Strength against density