PETG-HT: density, print temperature and when to choose it
PETG-HT is a modified PETG (usually based on glycol copolyesters with a higher glass transition temperature) whose softening temperature (HDT) is raised from PETG's typical ~70°C to 90–100°C and above. It's an attempt to occupy the niche between plain PETG and polycarbonate: noticeably higher heat resistance than base PETG, but easier to print than PC and not always requiring an enclosure.
Key properties
| Parameter | Value |
|---|---|
| Density | ≈1.28 g/cm³ (close to plain PETG) |
| Nozzle temperature | 250–275°C (noticeably higher than plain PETG) |
| Bed temperature | 80–95°C |
| Part cooling | 10–30% |
| Shrinkage | small, slightly higher than plain PETG due to the higher print temperatures |
| Enclosure required | recommended, especially for large parts — reduces the risk of delamination while cooling |
When to use it
- Parts that need to withstand heat up to 90–100°C — e.g. near electronics or in warm rooms, where plain PETG won't do.
- Replacing polycarbonate where you'd rather avoid PC's hygroscopic, drying-sensitive nature.
- Functional housings and fasteners with higher heat-resistance requirements than standard PETG.
When to pick something else
- Printing on a printer without a bed that can hold 80°C+ steadily — plain PETG is the better choice then.
- You need maximum heat resistance and impact resistance together — PC or PC-ABS give a higher heat ceiling.
- Budget is limited and the part won't heat above 60–70°C — plain PETG handles it more cheaply.
Pros and cons
Pros: noticeably higher heat resistance than plain PETG while staying relatively easy to print, without the mandatory drying nylon or PC needs; retains PETG's chemical and moisture resistance.
Cons: requires high nozzle and bed temperatures that not every printer can hold steadily, costs more than base PETG, large parts can delaminate while cooling without an enclosure.
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RuStoreHow it affects your print cost
The elevated nozzle and bed temperatures increase power consumption while printing and require a printer with a more capable hotend and bed — if the equipment isn't rated for these temperatures out of the box, that's a one-time capital expense worth accounting for separately from the spool price. The filament itself usually costs 20–40% more than plain PETG.