POM-H black

POM-H black is a homopolymer acetal material that is manufactured by Ensinger (using black DuPont™ Delrin® resin) under the tradename TECAFORM AD black. With regard to the properties of POM-H black, the material exibits a high melting point and high strength, but is sensitive to hydrolysis with continuous exposure to hot water over 60°C and steam. Black Delrin, like all other POM-H materials, holds a slightly higher density, hardness and strength than POM-C. ​Furthermore, POM-H black has excellent wear resistance and good sliding properties, as well as an outstanding machining ability, thus, making POM-H black an extremely adaptable engineering material. ​​



Chemical designation
POM-H (Polyacetal (Homopolymer))
Alternative colours available
1,43 g/cm3

Main Features

  • high strength
  • difficult to bond
  • good slide and wear properties
  • good machinability
  • not hot water resistant over 60°C
  • good chemical resistance
  • easy to polish

Target industries

Technical details

  • Mechanical properties
    Mechanical propertiesValueUnitParameterNorm
    Ball indentation hardness185MPaISO 2039-1
    Notched impact strength (Charpy)14kJ/m2max. 7,5JDIN EN ISO 179-1eA
    Impact strength (Charpy)n.b.kJ/m2max. 7,5JDIN EN ISO 179-1eU
    Modulus of elasticity
    (flexural test)
    3600MPa2mm/min, 10 NDIN EN ISO 178
    Compression strength22/38/72MPa1% / 2% / 5%EN ISO 604
    Flexural strength106MPa2mm/min, 10 NDIN EN ISO 178
    Tensile strength80MPa50mm/minDIN EN ISO 527-2
    Tensile strength at yield80MPa50mm/minDIN EN ISO 527-2
    Elongation at yield32%50mm/minDIN EN ISO 527-2
    Modulus of elasticity
    (tensile test)
    3600MPa1mm/minDIN EN ISO 527-2
    Elongation at break (tensile test)43%50mm/minDIN EN ISO 527-2
    Compression modulus2800MPa5mm/min, 10 NEN ISO 604
  • Thermal properties
    Thermal propertiesValueUnitParameterNorm
    Service temperature110Clong termNN
    Melting temperature182CDIN EN ISO 11357
    Glass transition temperature-60CDIN EN ISO 11357
    Service temperature150Cshort termNN
    Thermal expansion (CLTE)1110-5*1/K23-60°C, long.DIN EN ISO 11359-1;2
    Thermal expansion (CLTE)1110-5*1/K23-100°C, long.DIN EN ISO 11359-1;2
    Thermal conductivity0.43W/(k*m)ISO 22007-4:2008
    Specific heat1.3J/(g*K)ISO 22007-4:2008
  • Electrical properties
    Electrical propertiesValueUnitParameterNorm
    volume resistivity1014O*cmSilver electrode, 23°C, 12% r.h.DIN IEC 60093
    surface resistivity1014OSilver electrode, 23°C, 12% r.h.DIN IEC 60093
    Dielectric strength38kV/mm23°C, 50% r.h.ISO 60243-1
    Resistance to tracking (CTI)600VPlatin electrode, 23°C, 50% r.h., solvent ADIN EN 60112
  • Other properties
    Other propertiesValueUnitParameterNorm
    Water absorption0.1%24h / 96h (23°C)DIN EN ISO 62
    Resistance to hot water/ bases---
    Resistance to weathering--NN
    Flammability (UL94)HB-corresponding toDIN IEC 60695-11-10;

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