DELRIN® 527UV black

POM-H UV Resistant

Delrin® 527UV BK701 is a black homopolymer acetal that has been enhanced with UV stabilizers. It is also available in natural on a custom run basis. Developed by DuPont to replace Delrin® 507, this material is particularly suited to automotive and other outdoor applications. It exhibits improvements in UV aging characteristics and thermal stability.  Delrin® is a registered trademark of DuPont. 



Chemical designation
POM-H (Polyacetal (Homopolymer))
1,41 g/cm3

Main Features

  • very good UV and weather resistance
  • improved surface hardness
  • good machinability
  • very good mechanical strength

Target industries

Technical details

  • Mechanical properties
    Mechanical propertiesValueUnitConditionTest Method
    Tensile strength at yield10,300psi@ 73 °FASTM D 638
    Elongation at break15%@ 73 °FASTM D 638
    Modulus of elasticity
    (tensile test)
    420,000psi@ 73 °FASTM D 638
    Flexural strength13,500psi@ 73 °FASTM D 790
    Modulus of elasticity
    (flexural test)
    490,000psi@ 73 °FASTM D 790
    Impact strength (Izod)1.25ftlbsin@ 73 °FASTM D 256
    Rockwell hardness89-M ScaleASTM D 785
    Rockwell hardness120-R ScaleASTM D 785
  • Thermal properties
    Thermal propertiesValueUnitConditionTest Method
    Melting temperature352F-
    Deflection temperature325F@ 66 psiASTM D 648
    Deflection temperature198F@ 264 psi-
    Service temperature185FLong Term-
    Thermal expansion (CLTE)6.1*10-5ininF-
  • Other properties
    Other propertiesValueUnitConditionTest Method
    Moisture absorption0.14%@ 24 hrs, 73 °FASTM D 570
    Flammability (UL94)HB--

Stock program