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PA6.6 – Polyamide 6.6 PA66 GF25 FR

AKROMID® A3 K1 FR natural (2312)

9200 MPa

140 MPa

65 kJ/m²

AKROMID® A3 K1 FR natural (2312) is a 25% glass fibre reinforced, halogen- and red phosphourus free flame retardant polyamide 6.6 with light inherent color, all color listed at UL and NF F 16-101.

Typical applications

Switch housings in the electric industry



Processing information

The listed values are recommendations. Higher values should be used for higher glass loadings. We recommend only de-humidifying or vacuum dryers. Extensive drying can cause filling problems and surface defects.

6Drying time2 - 4 h

Drying temperature (τ ≤ -30°C)80°C

Processing moisture0,02 - 0,08%

1Feed section60 - 80°C

2Temperature zone 1 - Zone 4260 - 290°C

3Nozzle temperature260 - 300°C

4Melt temperature270 - 290°C

5Mold temperature60 - 100°C

P NachHolding pressure, spec.300 - 800 bar

P StauBack pressure, spec.30 - 100 bar

Injection speedmedium

Screw speed5 - 10 m/min

  • Mechanical Properties
    Tensile modulus (1 mm/min | ISO 527-2)
    d.a.m.9200 MPa
    conditioned6500 MPa

    Stress at break (5 mm/min | ISO 527-2)
    d.a.m.140 MPa
    conditioned100 MPa

    Strain at break (5 mm/min | ISO 527-2)
    d.a.m.3 %
    conditioned4 %

    Flexural modulus (2 mm/min | ISO 178)
    d.a.m.9000 MPa
    conditioned7000 MPa

    Flexural strength (2 mm/min | ISO 178)
    d.a.m.220 MPa
    conditioned170 MPa

    Flexural strain at break (2 mm/min | ISO 178)
    d.a.m.3 %
    conditioned4 %

    Charpy impact strength (23°C | ISO 179-1/1eU)
    d.a.m.65 kJ/m²
    conditioned70 kJ/m²

    Charpy impact strength (-30°C | ISO 179-1/1eU)
    d.a.m.65 kJ/m²

    Charpy notched impact strength (23°C | ISO 179-1/1eA)
    d.a.m.11 kJ/m²
    conditioned13 kJ/m²

    Izod-notched impact strength (23°C | ISO 180/1A)
    d.a.m.10 kJ/m²

    Ball indentation hardness (358N/30s | ISO 2039-1)
    d.a.m.221 MPa

  • Thermal Properties
    Temperature of deflection under load HDT/A (1,8 MPa | ISO 75)246 °C

    Temperature of deflection under load HDT/B (0,45 MPa | ISO 75)261 °C

    Melt temperature (DSC, 10K/min | DIN EN 11357-1)262 °C

    Temperature index for 50% loss of tensile strength after 20.000h (20.000 Std. | IEC 60216)120-130 °C

  • Flammability
    Burning rate (UL 94)
    0,4mm Wall thicknessV0 Class
    0,8mm Wall thicknessV0 Class
    1,6mm Wall thicknessV0 Class
    3,2mm Wall thicknessV0 Class

    GWFI (IEC 60695-2-12)
    0,4mm Wall thickness960 °C
    0,8mm Wall thickness960 °C
    1,6mm Wall thickness960 °C
    3,2mm Wall thickness960 °C

    GWIT (IEC 60695-2-13)
    0,4mm Wall thickness775 °C
    0,8mm Wall thickness750 °C
    1,6mm Wall thickness775 °C
    3,2mm Wall thickness775 °C

    HWI (UL 746A)
    0,8mm Wall thickness0 PLC

    HAI (UL 746A)
    0,8mm Wall thickness0 PLC

    Oxygen index (ISO 4589-2)32 %

  • General properties
    Density (23°C | ISO 1183)1,34 g/cm³

    Molding shrinkage (flow | ISO 294-4)0,2-0,4 %

    Molding shrinkage (transverse | ISO 294-4)0,9-1,1 %

  • Electrical Properties
    Comparative tracking index (Test liquid A | IEC 60112)600 V

    Dieletric strength (3 mm | IEC 60243)28 kV/mm

    Permittivity (1 MHz | IEC 60250)3,7


All specifications and information given on this website are based on our current knowledge and experience. A legally binding promise of certain characteristics or suitability for a concrete individual case cannot be derived from this information. The information supplied here is not intended to release processors and users from the responsibility of carrying out their own tests and inspections in each concrete individual case. AKRO®, AKROMID®, AKROLEN®, AKROLOY®, AKROTEK®, ICX® and PRECITE® are registered trademarks of the Feddersen Group.

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