Plastic POM/Acetal

Plastic POM/Acetal (Delrin) strength, stiffness, density and thermal properties, with their source.

A bracket in Plastic POM/Acetal, smooth finish.

Mechanical
Process	Bulk polymer (molded or machined)
Yield strength	69MPasourcetypical (single ASTM D638 tensile strength)
Ultimate tensile strength	69MPasourcetypical
Compressive strength	124MPasourcecompressive stress at 10% deformation
Flexural strength	99MPasourceflexural yield strength, typical
Elongation at break	75%sourcetypical
Young's modulus (stiffness)	2.8GPasourcetypical
Density	1,420kg/m³sourcetypical (DuPont product information for Delrin 100 NC010; 'The data listed here fall within the normal range of product properties')
Strength to weight	48.6kN·m/kg
Stiffness to weight	1.97MN·m/kg
Poisson's ratio	0.35sourcetypical
Shear modulus	1.04GPa
Bulk modulus	3.11GPa
Speed of sound	1,404m/s
Thermal
Thermal conductivity	0.4W/m·Ksourcetypical
Thermal expansion	122µm/m·Ksourcemean, 29 to 60 °C
100 mm part over a 50 °C swing	610µm growth
Specific heat	1,465J/kg·Ksourceaverage -18 to 100 °C, Delrin acetal resins (not grade-specific)
Heats up and cools (diffusivity)	0.192mm²/s
Thermal shock resistance	52.5W/m
Melting point	175°Csourcecrystalline melting point
Max service temperature	125°CsourceHDT 1.8 MPa (annealed)
Values for	DuPont Delrin 100 acetal homopolymer, Table 2 'Typical Properties of Delrin Acetal Resins' (ASTM methods), Delrin Design Guide Module III hosted on delrin.com

Among 59 materials

Stiffness against density

Strength against density