Functional parts fail when material properties don’t match the application. Match three properties to your use case: mechanical load (strength), operating temperature (heat resistance), and environmental exposure (chemical/UV resistance).
Step 1: Define the Load
| Load Type | Best Material | Why |
|---|---|---|
| Static (constant weight) | PETG | Good creep resistance |
| Dynamic (repeated stress) | PETG-CF | Carbon fiber reinforcement |
| Impact (sudden force) | PETG | High impact resistance |
| Torque (twisting) | PETG-CF | Best layer adhesion |
Step 2: Define the Temperature Range
| Operating Temp | Material Choice |
|---|---|
| Below 50°C | PLA, PETG |
| 50-80°C | PETG |
| 80-100°C | ASA |
| Above 100°C | Consider industrial materials |
Step 3: Define the Environment
| Environment | Risk | Solution |
|---|---|---|
| Outdoor (UV) | Photo-degradation | ASA |
| Humid/wet | Moisture absorption | PETG (sealed) |
| Chemical exposure | Dissolution | Check MSDS compatibility |
| Abrasive contact | Surface wear | PETG-CF |
Step 4: Validate
Before committing to production, print a test piece in the actual orientation it will be used. Layer direction affects strength — parts loaded parallel to layers are weakest at layer interfaces.
Individual results depend on your printer, environment and application.