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Acetal is a popular plastic for fabricated parts


  • 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


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.

acetal partAcetal'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.


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


Our application engineers can help. With decades of experience in plastic material selection, we'll help you choose the optimal plastic for your application and budget.

To compare
the cost of this material to other thermoplastics, click here.

General Material Properties

Property   Metric units   English units
Density   1.39e3 - 1.43e3 kg/m^3   86.8 - 89.3 lb/ft^3
Yield Strength   2.86e7 - 7.24e7 Pa   7.05 - 10.5 ksi
Tensile Strength   6e7 - 8.96e7 Pa   8.7 - 13 ksi
Elongation   0.1 - 0.75 % strain   10.0 - 75.0 % strain
Hardness (Vickers)   1.43e8 - 2.43e8 Pa   14.6 - 24.8 HV
Fracture Toughness   1.71e6 - 4.2e6 Pa/m^0.5   1.55 - 3.82 ksi/in^0.5
Young's Modulus   2.5e9 - 5e9 Pa   0.363e6 - 0.725e6 10^6 psi
Max Service Temperature   76.9 - 96.9 °C   170 - 206 °F
Melting Temperature   160 - 184 °C   320 - 363 °F
Insulator or Conductor   Insulator   Insulator
Specific Heat Capability   1.36e3 - 1.43e3 J/kg °C   0.326 - 0.342 BTU/lb. °F
Thermal Expansion Coefficent   7.57e-5 - 2.02e-4 strain/°C   42.1 - 112 µstrain/°F
CO2 Footprint   3.8 - 4.2 kg/kg   3.8 - 4.2 lb/lb
Recycleable   Yes   Yes

The information on this page is intended as general guidance only and is only accurate at the time of posting (see date below). Specific material properties vary by manufacturer. Please contact a Dielectric application engineer for help in choosing the optimal material for your application and budget.

Posting Date: August 16, 2012