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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
Resin

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Technical Information

Stock Products Properties Applications Advantages

Stock Products

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

Properties

Physical PropertiesUnitsASTMResults
Density kg/m3 (g/cm3 ) ISO 1183 1600 (1.60)
Mechanical PropertiesUnitsASTMResults
Tensile Strength MPa (kpsi) ASTM D 638 5mm/min (0.2in/min) - 151 (21.9)
Elongation at Break % ASTM D 638 5mm/min (0.2in/min) - 3.2
Tensile Modulus MPa (kpsi) ASTM D 638 5mm/min (0.2in/min) - 9000 (1310)
Flexural Modulus MPa (kpsi) ASTM D 790 8000 (1160)
Izod Impact J/m (ft lb/in) ASTM D 256 96 (1.8)
Unnotched Impact J/m (ft lb/in) ASTM D 4812 1100 (20.6)
Thermal PropertiesUnitsASTMResults
Heat Deflection Temperature °C (°F) ASTM D 648
0.45MPa (66psi), Not Annealed 177 (351)
1.8MPa (264psi), Not Annealed 173 (344)
CLTE, Parallel ASTM E 831 E-4/C
23 - 55C (73 - 130F) 0.29
CLTE, Normal ASTM E 831 E-4/C
23 - 55C (73 - 130F) 0.83
Electrical PropertiesUnitsASTMResults
Surface Resistivity ohm ASTM D 257 2 E15
Volume Resistivity ohm cm ASTM D 257 4 E13
Dielectric Strength, Short Time kV/mm (V/mil) ASTM D 149
3.2mm (0.126in) 17.3 (440)
Dielectric Constant ASTM D 150
1E6 Hz 3.8
Dissipation Factor ASTM D 150
1E6 Hz 0.0076

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.

Applications

  • Automotive

Advantages

  • Creep Resistance
  • Weldable
  • Homopolymer
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