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Delrin® 525GR is a 25% glass reinforced acetal homopolymer for injection molding. It has very high strength, stiffness, and high deflection temperature, and excellent creep resistance. Delrin® is the crystalline thermoplastic of choice for impact and wear resistance in a wide range of industrial and mechanical applications. With low, consistent internal stress, the material is easily machined and fabricated, experiencing little dimensional change during machining and use.

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At a Glance

Generic Name
Polyoxymethylene, Polyacetal

Available In
Sheet, Rod

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Technical Information

Stock Products Properties Applications Advantages

Stock Products

Sheet 1/4″ – 4′ 24” x 48’, 12” x 48”, 48” x 96” Brown, White (FDA)
Rod 1/8″ – 4″ 96”, 120” Brown, White (FDA)

Give us your cut-to-size dimensions. We will precision-cut these plastics to your exact size. Additional sizes and colors available upon request.


Physical PropertiesUnitsASTMResults
Density lb/in³ D792 1.50
Water Absorption, 24 hrs % D570 0.15
Mechanical PropertiesUnitsASTMResults
Tensile Strength @ yield psi D638 6800
Tensile Modulus psi D638
Tensile Elongation @Break % D638 22.3
Flexural Strength psi D790 9500
Flexural Modulus psi D790 299000
Compressive Strength psi D695
Compressive Modulus psi D695
Hardness, Rockwell R D785
IZOD Impact Strength Notched ft-lb/in D256 0.8
Thermal PropertiesUnitsASTMResults
Coeffcient of Linear Thermal Expansion (x 10^-5 in./in./°F)
Heat Deflection Temp at 264 psi °F 184
Melting Temperature °F
Max Operating Temp. °F
Flammability Rating
Electrical PropertiesUnitsASTMResults
Dielectric Strength. 1/8″ th. V/mil D149 450000
Dielectric Constant @1 MHz
Dissipation Factor@1 MHz D150
Volume Resistivity, 50% RH ohm-cm D257

NOTE: The property values presented above 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.


  • Bushings
  • Bearings
  • Seals
  • Gaskets
  • Slide Pads


  • Excellent Wear Properties in both wet and dry environments
  • Low moisture absorption
  • Low friction
  • Good chemical resistance
  • Good dimensional stability
  • Easy to machine
  • FDA Compliant (white only)
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