Thermoplastic comparison
ABS vs 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 | ABS | PET | Difference |
|---|---|---|---|
| Density | 1.05 g/cm³ | 1.37 g/cm³ | PET — 30% higher |
| Young's modulus E | 2.3 GPa | 2.9 GPa | PET — 26% higher |
| Tensile strength | 44 MPa | 60 MPa | PET — 36% higher |
| Glass transition Tg | 105 °C | 76 °C | ABS — 29 °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.