How to choose a 3D printing material

Most material choices go wrong in the same way. Someone picks a familiar name, prints a part, and only then finds out it creeps, cracks or softens. A better approach is to start from what the part has to do, narrow the field with data, then test. This guide walks you through it.

Step 1: Write down your requirements

Before you open the finder, answer these questions. Rough answers are fine. Be honest about which ones are must-haves and which are nice-to-haves.

Load

Will the part carry weight, take impacts, flex repeatedly or hold a constant load for months? Stiffness, strength, impact resistance and creep are different things. A stiff material can still snap on impact. Read tensile strength, Young’s modulus and impact strength to see which matters for you.

Temperature

What is the hottest the part will get, and for how long? Think about sunlight, nearby motors, dishwashers and car interiors. Heat deflection temperature is the usual starting point. See heat deflection temperature and high-temperature parts.

Flexibility

Does the part need to bend, stretch or seal? Then elongation at break and hardness matter more than strength. See flexible parts and Shore hardness.

Environment

List what the part will touch: UV light, rain, oils, fuels, cleaning agents, solvents. Humidity matters too, because some plastics absorb water and change. See outdoor and UV parts.

Regulations

Does the part need a flame rating, static control, food contact or biocompatibility? These are pass-or-fail requirements, so check them first. Certifications apply to a specific grade, often with a specific printer and process. Your finished part still has to be validated for its use. See flame-retardant parts, ESD and electronics, food contact and dental and medical.

Appearance

Is surface finish, colour, translucency or fine detail important? Appearance often decides the process before it decides the material.

Process

Which printers can you use, or which service will make the part? A material is only an option if you can print it well. The process guide explains the trade-offs.

Cost

Consider material price, print time, failure rate and post-processing together. A cheaper material that needs three attempts is not cheaper.

Step 2: Build a shortlist

Turn your must-haves into filters in the finder. Start with the hardest constraint, usually temperature or a regulation, and add others one at a time. Watch how fast the list shrinks.

For example, materials in the hub with a heat deflection temperature of at least 100 °C: 128. Add a flame-retardant requirement and the list gets much shorter: 23.

Here are the flame-retardant materials with the highest heat deflection temperatures in our data:

1. PLA 3148–137
2. PETG 1558–78
3. ABS 1770–118.1
4. PA12 1153–165
5. PC 1299–163
6. PEI 13152–215.12
7. PEEK 11140–305

色条 = 最低至最高，圆点 = 中位数。共 110 种材料，数据实时来自我们的数据库。

Aim for three to five candidates. Then put them side by side in the compare tool.

Step 3: Sanity-check the numbers

Datasheet values are useful but easy to misread. Before you rely on a number, check these points.

• Test method. ASTM and ISO tests use different specimens and conditions, so their results are not directly comparable. See ASTM vs ISO.
• Test conditions. Heat deflection temperature can be measured at 0.45 MPa or 1.8 MPa, and the lower load gives a higher number. See HDT at 0.45 vs 1.8 MPa.
• Print orientation. Printed specimens are often tested in their strongest direction. Your part may be loaded across layers. See print orientation.
• Typical or minimum. Most values are averages, not guarantees. See typical vs minimum values.
• Condition of the specimen. Was it annealed, post-cured, dry or conditioned? Nylons, for example, change as they absorb moisture.
• Across brands. Makers test differently, so small differences may not be real. See comparing brands.

The hub’s property explainers help here too:

For a full walkthrough, read how to read a datasheet.

Step 4: Prototype and test

No datasheet can tell you how your geometry will behave. Print your top two or three candidates and test them in conditions as close to real use as you can manage.

• Load the part the way it will be loaded, including the direction relative to the layers.
• Heat it, wet it or expose it to the chemicals it will meet.
• Check fit after a few days, since some materials keep shrinking or absorb moisture.
• For long-term loads, leave a loaded part for a while and measure any creep.

Step 5: Plan for production

Once a material passes testing, lock down the details: grade, colour, process, orientation and settings. Changing any of them can change the result. If the part moves to end-use production, keep a record of what worked so every batch is made the same way. For tooling, see jigs and fixtures.

When to ask Quick3D

Talk to us if your requirements conflict, if no material in the finder meets all of them, or if you need a material we list but you cannot print yourself. We can also help when a regulated application needs a careful choice of grade and workflow, or when you want test prints in several materials before you commit. Bring your requirements list from Step 1. It makes the conversation faster.

Ready to start? Open the finder and apply your first filter.

Browse filaments in the finder 270 种材料

Browse resins in the finder 223 种材料