Thermoplastic
Polyethylene, high-density (HDPE)
Semi-crystalline commodity thermoplastic; tough, cheap, chemically inert — pipes, containers, cutting boards.
| Property | Value | Source | Method | Conditions | Note |
|---|---|---|---|---|---|
| Density | 0.95 g/cm³ | Callister & Rethwisch, Materials Science and Engineering, 10th ed. | ASTM D792 | 23 °C, dry | — |
| Young's modulus E | 1 GPa | Callister & Rethwisch, Materials Science and Engineering, 10th ed. | ASTM D638 | 23 °C, dry | 0.8–1.3 typical range |
| Tensile strength | 27 MPa | Callister & Rethwisch, Materials Science and Engineering, 10th ed. | ASTM D638 | 23 °C, dry | — |
| Glass transition Tg | -120 °C | Callister & Rethwisch, Materials Science and Engineering, 10th ed. | DSC | 23 °C, dry | deep below room temperature — always in its ductile state in use |
| Melting point Tm | 131 °C | Callister & Rethwisch, Materials Science and Engineering, 10th ed. | DSC | 23 °C, dry | — |
Compare with
Polyethylene, high-density (HDPE) vs Polypropylene (PP)
Polyethylene, high-density (HDPE) vs Polyamide 6 (PA6, Nylon 6)
Polyethylene, high-density (HDPE) vs Polycarbonate (PC)
Polyethylene, high-density (HDPE) vs PEEK
Polyethylene, high-density (HDPE) vs PVC, rigid (uPVC)
Polyethylene, high-density (HDPE) vs Polystyrene (GPPS)
Sources
- Callister & Rethwisch, Materials Science and Engineering, 10th ed.
Typical room-temperature values for learning and preliminary design; grades vary. Always confirm against the supplier datasheet before design work. Data policy: docs/DATA-SOURCES.md in the repository.