Choose a material for end-use parts

More printed parts now go straight into products: housings, brackets, ducts, clips, custom grips and spare parts. An end-use part has to work for its whole life, every time, across every copy you make. That changes how you choose a material.

What fails in end-use parts

• Inconsistency. One good prototype does not prove the hundredth part will be good. Printer, batch and setting changes all add variation.
• Ageing. UV, heat, moisture and chemicals change properties over months and years.
• Fatigue. Parts that flex or vibrate fail after many cycles, well below their one-time strength.
• Creep. Parts under constant load slowly deform.
• Missing paperwork. Customers and regulators may need flame, food, skin-contact or RoHS documentation.

Which properties matter

Start from the environment, then the load. Check heat deflection temperature for the hottest the part will see. Use tensile strength, flexural modulus and impact strength for the loads. Read elongation at break as a sign of toughness: materials that stretch before breaking usually tolerate abuse and fatigue better.

Material families that usually work

• PA12 and PA11 powders are the most proven choice for printed production parts. They are tough, isotropic and consistent. Our powder materials show tensile strength of 8–84 MPa (median 42 MPa, 27 bahan).
• Engineering filaments such as ASA, PC, nylon and fibre-filled grades work well for large or low-volume parts.
• High-performance polymers such as PEI and PEEK serve aerospace, automotive and industrial parts that need heat, chemical or flame resistance.
• Durable and high-temperature resins suit small, detailed parts, but check how they age under UV.
• TPU in any process makes durable soft-touch and flexible parts.

Process considerations

Powder processes (SLS and MJF) are built for production. They need no supports, nest many parts per build and give consistent results. We list 10 MJF materials and 17 SLS materials. FFF works well for large parts and low volumes, with care over orientation. Resin is best for small precise parts where surface finish matters. See the process guide.

Design and post-processing tips

• Lock the process. Fix the material, printer, profile, orientation and post-processing once validated, and record them.
• Test samples from production, not only the first article.
• Seal or dye powder parts to reduce moisture uptake and staining.
• Coat for UV if the part lives outdoors. See outdoor and UV-exposed parts.
• Use inserts for threads that will be assembled more than a few times.
• Design for the process: uniform walls, fillets and no unsupported overhangs where possible.

A shortlist from our data

For parts that need to take abuse, these powder materials stretch the furthest before breaking:

1. PA12 74–25
2. PA11 97–40
3. PP 316–34
4. TPU 8280–440

Bar = terendah hingga tertinggi, titik = median. 27 bahan, terus daripada pangkalan data kami. Skala log.

Common mistakes

• Scaling up from a single good prototype without a validation run.
• Designing to typical datasheet values with no margin.
• Forgetting UV, moisture and heat ageing.
• Changing material batch, colour or settings without retesting.
• Assuming the material’s certifications cover your finished part.

See all powder materials for production 27 bahan