DELRIN 511 Series Acetal Homopolymer

POM-H enhanced machining

DELRIN 511P is another Homopolymer acetal from DuPont that offers enhanced crystallization characteristics. This higher level of crystallization helps to augment aspects of the physical properties such as fatigue strength, stiffness, and creep resistance.


Chemical designation
POM-H (Polyacetal (Homopolymer))
1,42 g/cm3

Main Features

  • good machinability
  • high stiffness
  • high fatigue strength
  • high creep resistance
  • good wear properties
  • very good abrasion resistance

Target industries

Technical details

  • Mechanical properties
    Mechanical propertiesValueUnitConditionTest Method
    Modulus of elasticity
    (tensile test)
    450,000psiASTM D 638
    Rockwell hardness95-@ 73 °FASTM D 785
    Coefficient of friction0.20%StaticASTM D 3702
    Wear rate55*10-10in3minftlbshr40 psi, 50 fpmASTM D 3702
    Elongation at break25%@ 73 °FASTM D 638
    Compression strength2,100psi@ 73 °F, 1% strainASTM D 695
    Impact strength (Izod)1.25ftlbsin@ 73 °FASTM D 256
    Modulus of elasticity
    (flexural test)
    520,000psi@ 73 °FASTM D 790
    Flexural strength16,000psi@ 73 °FASTM D 790
    Tensile strength at yield10,000psiASTM D 638
    Elongation at yield18%@ 73 °FASTM D 638
    Compression strength16,500psi@ 73 °F, 10% strainASTM D 695
    Coefficient of friction0.35-DynamicASTM D 3702
  • Thermal properties
    Thermal propertiesValueUnitConditionTest Method
    Specific heat0.35butlbf-
    Melting temperature352FDIN EN ISO 11357
    Service temperature300FIntermittent-
    Deflection temperature325F@ 66 psiISO-R 75 Method B
    Thermal expansion (CLTE)6.8*10-5ininFASTM D 696
    Deflection temperature225F@264 psiISO-R 75 Method A
    Service temperature185FLong Term-
  • Electrical properties
    Electrical propertiesValueUnitConditionTest Method
    Volume resistivity1015O*cmASTM D257
  • Other properties
    Other propertiesValueUnitConditionTest Method
    Moisture absorption0.20%@ 24 hrs, 73 °FASTM D 570
    Moisture absorption.90%@ saturation, 73 °FASTM D 570

Stock program