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Engineering 185°F - 300°F | Acetal

DELRIN®* acetal homopolymer

DELRIN® is a crystalline plastic which offers an excellent balance of properties that bridge the gap between metals and plastics. DELRIN® possesses high tensile strength, creep resistance and toughness. It also exhibits low moisture absorption. It is chemically resistant to hydrocarbons, solvents and neutral chemicals. These properties along with its fatigue endurance make DELRIN® ideal for many industrial applications.

*Delrin is a trademark of the DuPont Company.

  • Good dimensional stability
  • Low moisture absorption
    DELRIN® can operate in wet environments with little effect on performance or dimensions.
  • Excellent machinability
  • High fatigue endurance
  • High strength and stiffness properties
  • Superior impact and creep resistance
  • Chemical resistance to fuels and solvents
  • Natural grade is made from resin that is FDA, NSF and USDA compliant
  • Good wear and abrasion properties
    With its low coefficient of friction and hard and resilient surface, DELRIN® is the material of choice in
    many wear applications.

Ensinger manufactures homopolymer acetal stock shapes using DuPont's Delrin® 150 series acetal resin. It is a crystalline plastic which offers an excellent balance of properties to bridge the gap between metals and plastics. It possesses high tensile and flexural properties, along with creep resistance and toughness, while exhibiting low moisture absorption, and fatigue endurance.

  Properties Condition Units Value
Physical Chemical Designation POM
Density g/cm3 1.41
Mechanical Tensile Modulus @ 73 °F PSI 450,000
Tensile Strength @ Yld @ 73 °F PSI 11,000
Tensile Strength @ Brk @ 73 °F PSI
Shear Strength @ 73 °F PSI
Elongation @ Yld @ 73 °F %
Elongation @ Brk @ 73 °F % 25
Flexural Modulus @ 73 °F PSI 420,000
Flexural Strength @ 73 °F PSI 11,500
Compressive Modulus @ 73 °F PSI
Compressive Strength @ 73 °F, 10% strain PSI
Izod (charpy) Impact Strength @ 73 °F ft-lbs/in 1.5
Rockwell Hardness @ 73 °F M (R) Scale 94
Coefficient of Friction Static
Coefficient of Friction Dynamic, 40 PSI, 50 FPM 0.2
Wear (K) Factor in3-min/ft-lbs-hr 55*10-10
Limiting PV psi-fpm
Thermal Vicat Softening Point °F
Melting Temperature °F 347
Heat Deflection Temperature @ 66 °F 336
Heat Deflection Temperature @ 264 °F 257
Service Temperature Intermittent °F 300
Service Temperature Long Term °F 185
Thermal Expansion (CLTE) in/in/°F 6.8*10-5
Specific Heat BTU/lb-°F 0.35
Thermal Conductivity BTU-in/hr-ft2-°F
Electrical Surface Resistivity ohms/square
Volume Resistivity ohm-cm >1015
Dielectric Strength V/mil 500
Dielectric Contant @ 60 HZ, 73 °F, 50% RH 3.7
Dissipation Factor @ 60 Hz, 73 °F 0.005
Other Moisture Absorption @ 24 hrs, 73 °F % 0.25
Moisture absorption @ Saturation, 73 °F % 0.90
Flammability UL 94 HB
Food Grade Y
Relative Cost $