Thermoplastic comparison
Polyamide 12 (PA12, Nylon 12) vs PETG (glycol-modified PET)
Every value below is a typical room-temperature figure with its source, test method and conditions — the same dataset that drives the calculators.
| Property | Polyamide 12 (PA12, Nylon 12) | PETG (glycol-modified PET) | Difference |
|---|---|---|---|
| Density | 1.01 g/cm³ | 1.3 g/cm³ | PETG (glycol-modified PET) — 29% higher |
| Young's modulus E | 1.4 GPa | 2.2 GPa | PETG (glycol-modified PET) — 57% higher |
| Tensile strength | 50 MPa | 53 MPa | PETG (glycol-modified PET) — 6% higher |
| Glass transition Tg | 45 °C | 81 °C | PETG (glycol-modified PET) — 36 °C higher |
Where these numbers come from
- CAMPUS plastics database — typical grade datasheet values (campusplastics.com)
- MakeItFrom.com materials database — typical grade values
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.