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

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    Mechanical properties Value Unit Condition Test Method
    Tensile strength at break 17,700 psi ASTM D 638
    Modulus of elasticity
    (tensile test)
    537,000 psi ASTM D 638
    Compression strength 4,500 psi 1% strain ASTM D 695
    Compression strength 25,000 psi 10% strain ASTM D 695
    Compression modulus 374,000 psi ASTM D 695
    Shore hardness 90 - D scale ASTM D 2240
    Impact strength (Izod) 1.2 ftlbsin notched ASTM D 256
    Modulus of elasticity
    (flexural test)
    567,000 psi ASTM D 790
    Elongation at break (tensile test) 6.4 % ASTM D 638
    Flexural strength 21,000 psi ASTM D 790
    Coefficient of friction 0.18 - static ASTM D 1894
    Coefficient of friction 0.19 - dynamic ASTM D 1894
  • product-technical-detail-collapse-item-1-lvl-1
    Thermal properties Value Unit Condition Test Method
    Glass transition temperature 529 F ASTM D3418
    Thermal expansion (CLTE) 2.15 *10^-5 in/in / degre range -40 °F to 302 °F ASTM E 831
    Deflection temperature 494 F @ 264 psi ASTM D 648
  • product-technical-detail-collapse-item-2-lvl-1
    Electrical properties Value Unit Condition Test Method
    Dielectric strength 348 V/mil ASTM D 149
    Surface resistivity 1013 Ω/sq ASTM D 257
    Dielectric constant 3.34 - @ 1 MHz ASTM D 150
    Dissipation factor 0.014 - @ 1 MHz ASTM D 150
  • product-technical-detail-collapse-item-3-lvl-1
    Other properties Value Unit Condition Test Method
    Flammability (UL94) V-0 - 3.2 mm -
    Moisture absorption 0.2 % 24 hr immersion ASTM D 570
    Moisture absorption 1.7 % saturation ASTM D 570
    Limiting PV 10,000 psi-fpm ASTM D 3702

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