Polyamide 12 is the most-specified 3D printing nylon. Balanced mechanical properties, excellent chemical resistance, low moisture absorption (unlike PA6 and PA66), and compatibility with both SLS and MJF technologies. The default choice for functional prototypes and low-volume production of nylon parts.
Three properties make PA12 the default nylon for additive:
Low moisture absorption. PA6 and PA66 absorb 1.5–3% moisture at equilibrium — enough to change dimensions and mechanical properties noticeably. PA12 absorbs 0.4%, so parts stay stable in humid environments.
Good cold-flow behavior. PA12 melts cleanly in both SLS (laser-melted) and MJF (thermally-fused via absorbed IR) processes. PA6 and PA66 decompose at their processing temperatures.
Balanced toughness. Tensile 48 MPa, elongation 18% — strong enough for functional parts, ductile enough for snap-fits and living hinges.
| Variant | Tensile | Elongation | Notes |
|---|---|---|---|
| PA12 (unfilled) | 48 MPa | 18% | Standard, most versatile |
| PA12-GB (glass bead) | 30 MPa | 6% | Higher stiffness, lower impact — dimensionally stable |
| PA12-GF (glass fiber) | 51 MPa | 4% | Stiff structural, brittle. SLS only — MJF cannot handle fibers. |
| PA12-CF (carbon fiber) | 70 MPa | 3% | Highest strength-to-weight. Specialty material, SLS only. |
| PA12-AL (alumide) | 48 MPa | 4% | Metallic look, slight thermal conduction. Aesthetic applications. |
| PA12 FR (flame retardant) | 45 MPa | 10% | UL94 V-0 rated — aerospace interior, electrical enclosures |
Send STL. We print on EOS P396 (SLS) or HP Jet Fusion 5210 (MJF) — your choice based on tolerance and finish needs.
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