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Material Information

Delrin® 150 (unfilled) belongs to the acetal family of materials. Acetals are thermoplastics with the chemical name “PolyOxyMethylene” (POM). Overall, acetal provides high strength and stiffness, enhanced dimensional stability, low moisture absorption, a low coefficient of friction, good wear and abrasion properties, good chemical resistance, and is easy to machine. Moisture, lubricants, and solvents including gasoline have little effect on acetal, making them ideal for parts incorporating self-threading screws or interference fits. Acetals are available in a copolymer grade, a homopolymer grade (Delrin®), and a variety of filled Delrin® grades. The Delrin® 150 acetal homopolymer offers higher mechanical properties than the acetal copolymer, but slightly less chemical resistance. This makes it ideal for small diameter, thin walled, bushings that benefit from the additional strength and rigidity. Also unlike the acetal copolymer, the Delrin® 150 homopolymer has center line porosity, especially in large cross-sections. Because of this porosity, Delrin® 150 is not compliant with USP class 6 However, it is FDA, USDA, and NSP compliant in the natural grade. Delrin ® 150 is only available in the colors black and natural, in the forms of rod and plate.


  • Garden chemical sprayers
  • Pumps and beverage valves
  • Soap dispensers
  • Water softeners
  • Irrigation components
  • Gears
  • Bearings
  • Bushings
  • Washers
  • Rollers
  • Electrical insulator parts
  • Wear surfaces
  • Gears
  • Conveyers
  • Coil forms
  • Electrical and automotive switch components
  • Clothes dryers
  • Gas caps


  • Excellent moisture and chemical resistance
  • Has center line porosity
  • High tensile strength
  • Excellent fatigue endurance
  • Excellent dimensional stability
  • Good electrical properties
  • Good creep resistance
  • Natural lubricant
  • Excellent machinability
  • FDA, NSF, and USDA approved (natural)


PhysicalAstm Test MethodDelrin® 150 (Homo-Polymer)
Density (lb/in^3)D7920.051
Specific GravityD7921.41
Water Absorption @ 24 hours (%)D5700.2
Tensile Strength (PSI)D63811,000
Tensile Modulus (PSI)D638450,000
Tensile Elongation at Break (%)D63830
Flexural Strength (PSI)D79013,000
Flexural Modulus (PSI)D790450,000
Compressive Strength (PSI)D69516,000
Compressive Modulus (PSI)D695450,000
Izod Impact (Notched), ft-lb/inD2561
Rockwell HardnessD785M89, R122
Coefficient of Thermal Expansion,
Heat Deflection Temperature 264 psi, ºFD648250
Melting Point, °FD3418347
Continous Service Temp (Operating), °F180
Thermal Conductivity, BTU-in/hr-ft² °FF4332.5
Flammability RatingUL94HB
Dielectric Strength, Short Term,
(Volts/Mil) @ .125″ Thick
Volume Resistivity (ohm/square)D25710^15
Dielectric Constant at 1 MHzD1503.7
Dissipation Factor at 1 MHzD1500.005

Disclosure: The information contained herein are typical values intended for reference and comparison purposes only. They should NOT be used as a basis for design specifications or quality control. Contact us for manufacturers’ complete material property datasheets. All values at 73°F (23°C) unless otherwise noted.


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