TECAPAI® CM XP403 green

​Unreinforced polyamide-imide (PAI)

TECAPAI CM XP403 green is a compression molded Torlon® plastic material that is unreinforced and delivers an excellent combination of physical properties. Made from Solvay Torlon® powder, this PAI material offers excellent ductility and toughness as well as good strength and stiffness at elevated temperatures. Additional characteristics include good dielectric properties, wear performance, and excellent chemical resistance in its staple, which is typical of polyamide-imide properties. Users will find this PAI polymer extremely useful in applications such as electrical connectors, wear components and large parts that require strength and stiffness. Because it is compression molded, TECAPAI CM XP403 green can be ordered by the piece, adding to its usefulness and versatility. TECAPAI CM XP403 green is Ensinger's version of a product commonly referred to in web searches as "torlon 4503".


Chemical designation
PAI (Polyamide-imide)
1,41 g/cm3

Main Features

  • good wear properties
  • excellent strength and stiffness
  • excellent dimensional stability
  • very good thermal stability
  • excellent chemical resistance

Target industries

Technical details

  • Mechanical properties
    Mechanical propertiesValueUnitConditionTest Method
    Tensile strength at break17,700psiASTM D 638
    Modulus of elasticity
    (tensile test)
    537,000psiASTM D 638
    Compression strength4,500psi1% strainASTM D 695
    Compression strength25,000psi10% strainASTM D 695
    Compression modulus374,000psiASTM D 695
    Shore hardness90-D scaleASTM D 2240
    Impact strength (Izod)1.2ftlbsinnotchedASTM D 256
    Modulus of elasticity
    (flexural test)
    567,000psiASTM D 790
    Elongation at break6.4%ASTM D 638
    Flexural strength21,000psiASTM D 790
    Coefficient of friction0.18-staticASTM D 1894
    Coefficient of friction0.19-dynamicASTM D 1894
  • Thermal properties
    Thermal propertiesValueUnitConditionTest Method
    Glass transition temperature529FASTM D3418
    Thermal expansion (CLTE)2.15*10^-5 in/in / degrerange -40 °F to 302 °FASTM E 831
    Deflection temperature494F@ 264 psiASTM D 648
  • Electrical properties
    Electrical propertiesValueUnitConditionTest Method
    Dielectric strength348V/milASTM D 149
    Surface resistivity1013Ω/sqASTM D 257
    Dielectric constant3.34-@ 1 MHzASTM D 150
    Dissipation factor0.014-@ 1 MHzASTM D 150
  • Other properties
    Other propertiesValueUnitConditionTest Method
    Flammability (UL94)V-0-3.2 mm-
    Moisture absorption0.2%24 hr immersionASTM D 570
    Moisture absorption1.7%saturationASTM D 570
    Limiting PV10,000psi-fpmASTM D 3702

Stock program