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PAI - Polyamide Imide

Excellent mechanical properties

Due to its excellent mechanical properties, good notch impact resistance and low tendency to creep, Polyamide Imide (PAI) is used for manufacturing parts that can be subjected to heavy loads and require close tolerances at high operating temperatures.

In addition it has good wear resistance and is self-lubricating depending on fillers. PAI is self-extinguishing and has excellent resistance to UV, X-rays and gamma radiation.

PAI in our webshop

PAI rod Rod

Unique features

  • Extremely low linear expansion coefficient
  • Resistant to Gamma radiation
  • Resistant to X-ray radiation
  • Excellent UV resistance
  • Low friction resistance and very wear resistant
  • Dimensionally stable under high thermal loads

Applications

  • Dynamic dimensionally stable machine parts
  • Precision parts
  • Electronically insulating parts
  • Electrically insulating parts
  • Applications in the medical sector

Machining options

  • Water jet cutting
  • Laser cutting
  • Gluing
  • Welding
  • Hot bending
  • Cold bending
  • Thermoforming
  • Yes
  • Not in all cases
  • No

Technical information

  • General
    Description Norm Unit Value
    Density ISO 1183 g/cm³ 1.6
    Moisture absorption in normal climate - % <0.18
    Fire behavior DIN 4102 - -
    Specific heat capacity - kj/Kg°C -
  • Mechanical
    Description Norm Unit Value
    Tensile strength DIN 53455 N/mm 90
    Stretch to break DIN 53455 % 5
    E-Modulus DIN 53457 (23 °C) N/mm²  6000
    Flexural strength DIN 53452 N/mm²  -
    Impact strength DIN 53453 (23 °C) Charpy -
    Shore or ball pressure hardness - Shore °D -
    Coefficient of friction - - -
  • Electrical
    Description Norm Unit Value
    Relative electrical constant DIN 53485 (100Hz) 100Hz 4.4
    Dielectric loss factor DIN 53483 (100Hz) tan (..x10-³ 0.022
    Specific resistance DIN 53482 16 Ω cm 10
    Surface resistance DIN 53482 13 Ω 10
    Creep current resistance DIN 53480 KC -
    Breakdown voltage DIN 53481 kV/mm 28
  • Thermal
    Description Norm Unit Value
    Crystalline melting point - °C 285
    Thermal conductivity DIN 52162 W/m°K 0.36
    Linear expansion coefficient DIN 53762 mm/m°C 0.025
    Long-term operating temperature without load - °C -50 / 250
    Maximum short-term use temperature - °C 300
    Heat shape resistance DIN 53461 °C 260
  • Temperature range
    Minimum temperature Maximum temperature
     -20°C  +115°C

Processing data

  • Circular sawing
    Clearance angle (α) 15 - 30 [o]
    Rake angle (λ) 0 - 5 [o]
    Cutting speed 500 - 800 [m/min]
    Tooth spacing 3 - 5 [mm]
  • Band sawing
    Clearance angle (α) 15 - 30 [o]
    Rake angle (λ) 0 - 5 [o]
    Cutting speed 500 - 800 [m/min]
    Tooth spacing 3 - 5 [mm]
  • Drilling
    Clearance angle (α) 3 - 10 [o]
    Rake angle (λ) 10 - 30 [o]
    Top angle (φ) 90 [o]
    Cutting speed 40 - 200 [m/min]
    Start 0.1 - 0.3 [mm/rev]
  • Turning
    Clearance angle (α) 5 - 8 [o]
    Rake angle (λ) 0 - 5 [o]
    Setting angle (χ) 45 - 60 [o]
    Cutting speed 200 - 500 [m/min]
    Start 0.1 - 0.3 [mm]
  • Milling
    Clearance angle (α) 5 - 15 [o]
    Rake angle (λ) 5 - 15 [o]
    Cutting speed 250 - 500 [m/min]
    Start 0.2 - 0.5 [mm/rev]