Thermoplastic comparison

Polyamide 66 (PA66, Nylon 66) vs Polystyrene (GPPS)

Every value below is a typical room-temperature figure with its source, test method and conditions — the same dataset that drives the calculators.

Polyamide 66 (PA66, Nylon 66) in fullPolystyrene (GPPS) in full← All materials
PropertyPolyamide 66 (PA66, Nylon 66)Polystyrene (GPPS)Difference
Density1.14 g/cm³1.05 g/cm³Polyamide 66 (PA66, Nylon 66) — 9% higher
Young's modulus E3.2 GPa3.2 GPaidentical
Tensile strength83 MPa46 MPaPolyamide 66 (PA66, Nylon 66) — 80% higher
Glass transition Tg60 °C100 °CPolystyrene (GPPS) — 40 °C higher
Where these numbers come from
  • CAMPUS plastics database — typical grade datasheet values (campusplastics.com)
  • Callister & Rethwisch, Materials Science and Engineering, 10th ed.

Typical room-temperature values for learning and preliminary design; grades vary widely and a supplier datasheet always overrides a textbook figure. Confirm against the datasheet before design work.