<p>Your expected operating temperature exceeds the glass transition temperature by 3&nbsp;&deg;C. This implies that the structure will become weak and can deform under load. </p>

<p>Note that you cannot simply print PEI on a normal machine, it requires a special high temperature capable printer with hot end temperatures up to 400&nbsp;&deg;C and heated bed over 120&nbsp;&deg;C up to 160&nbsp;&deg;C, furthermore it will need a heated chamber (up to about 80&nbsp;&deg;C) which requires special care to cooling and placement of electronics and motors.</p>

<p>Not having specified what kind of structure you require, you could look into steel.</p>

CC BY-SA 4.0
2019-08-27T12:47:42.637Z
2019-08-28T06:01:55.623Z
2019-08-28T06:01:55.623Z
0scar
<p><strong><a href="https://en.wikipedia.org/wiki/Polyether_ether_ketone" rel="nofollow noreferrer">PEEK</a></strong> is also used in applications where dimensional stability (and/or chemical resistance) over a wide range of temperatures is desired. The requirements for printing are similar to those for PEI.</p>

CC BY-SA 4.0
2019-08-27T13:15:09.220Z
2019-08-27T13:15:09.220Z
Davo
<p>An easier but less simple solution might be to make a PLA 'pattern' that is the right size and shape, then use that to cast your item in aluminium  (melting point ~ 660C) using the 'investment' or 'lost PLA' process.<br>
Links:- 
<a href="https://www.instructables.com/id/3D-Printed-Lost-PLA-Investment-Casting-Aluminium/" rel="nofollow noreferrer">https://www.instructables.com/id/3D-Printed-Lost-PLA-Investment-Casting-Aluminium/</a>
<div class="youtube-embed"><div>
                <iframe width="640px" height="395px" src="https://www.youtube.com/embed/qxj5eUkAFUI?start=0"></iframe>
            </div></div></p>

CC BY-SA 4.0
2019-09-03T18:37:20.040Z
2019-09-03T18:37:20.040Z
Tegra
<p>I'm looking to 3D print a structure that won't deform in high heat, up to about 220&nbsp;&deg;C. The filament itself can be 3D printed all the way up to about 380&nbsp;&deg;C. </p>

<p>PEI seems like it could be a viable option. I found some <a href="https://www.matterhackers.com/store/l/3dxtech-thermax-pei-175mm-05kg/sk/MHCFSNUC?rcode=GAT9HR&amp;gclid=CjwKCAjwqZPrBRBnEiwAmNJsNsqaaSEcWYtaTv1rIwDKuWgI9xCyinqDgV7bYUUO3zX7-pIA0gDPSBoCclYQAvD_BwE" rel="nofollow noreferrer">here</a>. This PEI filament  specifies the glass transition temperature at 217&nbsp;&deg;C.</p>

<p>Would this filament work? Are there any other types of materials that would fulfill this engineering requirement?</p>

<filament><filament-choice>
What is the 3D printer filament (or pellet) most resistant to bending at high heats?
K Mmmm
# What is the 3D printer filament (or pellet) most resistant to bending at high heats?

(Asked by: username_0 on 2019-08-27)

I'm looking to 3D print a structure that won't deform in high heat, up to about 220 °C. The filament itself can be 3D printed all the way up to about 380 °C.

PEI seems like it could be a viable option. I found some [here](https://www.matterhackers.com/store/l/3dxtech-thermax-pei-175mm-05kg/sk/MHCFSNUC?rcode=GAT9HR&gclid=CjwKCAjwqZPrBRBnEiwAmNJsNsqaaSEcWYtaTv1rIwDKuWgI9xCyinqDgV7bYUUO3zX7-pIA0gDPSBoCclYQAvD_BwE). This PEI filament specifies the glass transition temperature at 217 °C.

Would this filament work? Are there any other types of materials that would fulfill this engineering requirement?

**Tags:** filament, filament-choice


---

## 3 answers

### Answer by username_1 on 2019-08-27. Score: 4 | Accepted answer

Your expected operating temperature exceeds the glass transition temperature by 3 °C. This implies that the structure will become weak and can deform under load.

Note that you cannot simply print PEI on a normal machine, it requires a special high temperature capable printer with hot end temperatures up to 400 °C and heated bed over 120 °C up to 160 °C, furthermore it will need a heated chamber (up to about 80 °C) which requires special care to cooling and placement of electronics and motors.

Not having specified what kind of structure you require, you could look into steel.


---

### Answer by username_2 on 2019-08-27. Score: 2

**[PEEK](https://en.wikipedia.org/wiki/Polyether_ether_ketone)** is also used in applications where dimensional stability (and/or chemical resistance) over a wide range of temperatures is desired. The requirements for printing are similar to those for PEI.


---

### Answer by username_3 on 2019-09-03. Score: 1

An easier but less simple solution might be to make a PLA 'pattern' that is the right size and shape, then use that to cast your item in aluminium (melting point ~ 660C) using the 'investment' or 'lost PLA' process.  
Links:-
<https://www.instructables.com/id/3D-Printed-Lost-PLA-Investment-Casting-Aluminium/>


---

