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Copolymer of Polyamide (AK 80/20)


Copolymer of Polyamide Molding AK 80/20 is intended for production of constructional parts by injection molding.

Copolymer AK 80/20 is applied in machine building, electrical engineering, instrument making industries and in other spheres. It is often used as a substitute of non-ferrous metals.

Copolymer of Polyamide is resistant to hydrocarbon connections, organic solvents, oils, alkali solutions. AK 80/20 is dissolved in concentrated mineral acids, formic and acetic acids, phenols. Temperature range of operation is from -50 to +70 °C.


Properties of Polyamide AK 80/20 (GOST 19459-87)

Indicator Value
Density, g/cm³ 1.13
Melting temperature, °C, not lower 212
Mass fraction of water, %, not more 0.4
Tensile strength, MPa (kgf/cm²) 58.8 - 68.6 (600 - 700)
Critical stress at cut, MPa (kgf/cm²) 49.5 - 58.8 (550 - 600)
Critical stress at compression,
MPa (kgf/cm²)
68.6 - 88.2 (700 - 900)
Brinell hardness, MPa (kgf/cm²) 98.0 - 117.6 (1000-1200)
Breaking alongation, % 200 - 300
Coefficient of friction against steel 0.22 - 0.23
Water absorption for 24 h, % 2.5 - 2.6
Water absorption, max., % 10.0 - 11.0
Shrinkage, % 1.4 - 1.8
Impact strength of a sample without
cut at 0 °C, kJ/m² (kgf·cm/cm²)
91.1 - 98.0 (93 - 100)
Impact strength of a sample without
cut at -20 °C, kJ/m² (kgf·cm/cm²)
107.8-112.7 (110 - 115)
Impact strength of a sample without
cut at -50 °C, kJ/m² (kgf·cm/cm²)
98.0 - 107.8 (100 - 110)
Charpy impact strength, kJ/m²
(kgf·cm/cm²), not less
3.9 (4.0)
Bending stress at specified value,
MPa (kgf/cm²), not less
55.8 (570)
Volume resistivity, Ohm·cm, not less 1·10¹²
Dielectric strength, kV/mm, not less 20
Dielectric loss tangent at
frequency 10⁶ Hz, not more
0.12
Combustion resistance PV-2