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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.
- 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
- Industrial and automotive parts
- Food processing parts
- Medical devices
- Packaging equipment components
- Plumbing parts
Acetal Material Properties
Dielectric Manufacturing, Richfield, Wisconsin USA dielectricmfg.com Acetal Material Properties Provided By Dielectric Manufacturing, Richfield, Wisconsin
Property Metric Units English Units
Density 1.39e3 - 1.43e3 kg/m^3 86.8 - 89.3 lb/ft^3
Mechanical 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
Thermal 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 Co-efficient 7.57e-5 - 2.02e-4 strain/°C 42.1 - 112 µstrain/°F
Eco CO2 Footprint 3.8 - 4.2 kg/kg 3.8 - 4.2 lb/lb
Recyclable Yes Yes
Dielectric Manufacturing, Richfield, Wisconsin USA dielectricmfg.com
Acetal Material Properties Provided By Dielectric Manufacturing, Richfield, Wisconsin