Acetal (Delrin®)

 In Food-Safe Materials, Thermoplastics

How Can We Help?

Table of Contents
< Back
You are here:

Acetal Characteristics

Acetal is an easy-to-machine, general purpose engineering plastic that has excellent dimensional stability. It is rigid, strong and has a low coefficient of friction against metals, other acetals and plastics. Its superior creep resistance makes acetal a good choice when dimensional stability is needed. Delrin® is a trade name of a homopolymer acetal.

See the chart below for details of acetal’s material properties.

Acetal’s other benefits include low water absorption, good electrical properties, resistance to fatigue and organic solvents, and outstanding wear characteristics.

Several grades of Acetal are FDA-approved for use with foods.

here to help 200Acetal’s characteristics include:

  • Strong, rigid and tough
  • Excellent mechanical stability
  • Excellent creep, moisture and fatigue resistance
  • Low coefficient of friction
  • Easily machined and fabricated
  • Low water absorption
  • FDA approved
  • Good electrical properties

Applications for Acetal – Delrin®

  • Mechanical gears and valves
  • Bearings
  • Industrial and automotive parts
  • Food processing parts
  • Medical devices
  • Packaging equipment components
  • Plumbing parts
  • Fixtures

Contact a Dielectric Manufacturing knowledge expert to discuss the use of acetal for fabrication of your thermoplastic parts. Call 800-367-9122 or email

Acetal Material Properties

Property MetricUnits EnglishUnits
Density1.39e3 - 1.43e3kg/m^386.8 - 89.3lb/ft^3
Yield Strength2.86e7 - 7.24e7Pa7.05 - 10.5ksi
Tensile Strength6e7 - 8.96e7Pa8.7 - 13ksi
Elongation0.1 - 0.75% strain10.0 - 75.0% strain
Hardness (Vickers)1.43e8 - 2.43e8Pa14.6 - 24.8HV
Fracture Toughness1.71e6 - 4.2e6Pa/m^0.51.55 - 3.82ksi/in^0.5
Young's Modulus2.5e9 - 5e9Pa0.363e6 - 0.725e610^6 psi
Max Service Temperature76.9 - 96.9°C170 - 206°F
Melting Temperature160 - 184°C320 - 363°F
Insulator or ConductorInsulatorInsulator
Specific Heat Capability1.36e3 - 1.43e3J/kg °C0.326 - 0.342BTU/lb. °F
Thermal Expansion Co-efficient7.57e-5 - 2.02e-4strain/°C42.1 - 112µstrain/°F
CO2 Footprint3.8 - 4.2kg/kg3.8 - 4.2lb/lb
Get a Quote

Previous ABS (Acrylonitrile-Butadlene-Styrene)
Next Acrylic