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We help innovators
find the cheapest
3D printing supplier.

SLM 3D Printing (Selective Laser Melting)

Fully dense metal parts built layer by layer from fine metal powder.

Selective Laser Melting (SLM) is a powder-bed metal additive process. A high-power laser scans each cross-section of your CAD model, melting metal powder that solidifies into a dense part. SLM is suited to lightweight structures, internal channels, and consolidated assemblies that are costly or impossible to machine from solid stock.

SLM 3D printing on AIHFABS
Metal

How it works

  1. Your 3D model is oriented, supported where needed, and sliced into thin layers.
  2. A recoater spreads a uniform layer of metal powder across the build plate.
  3. The laser melts the powder along the slice contour; the plate lowers and the cycle repeats.
  4. After printing, parts are depowdered, supports removed, and finished with heat treat or machining as required.

Key advantages

  • Near-full density suitable for structural and end-use metal components
  • Freedom to consolidate assemblies and embed lightweight lattice or internal cooling paths
  • Broad metal portfolio including aluminum, titanium, and stainless alloys
  • Consistent repeatability for serial production after process qualification

Typical applications

  • Aerospace brackets, ducting, and weight-optimized structural hardware
  • Automotive tooling inserts, jigs, and low-volume performance parts
  • Medical instruments and patient-specific surgical guides (material dependent)
  • Robotics end-effectors, heat sinks, and industrial automation fixtures

Materials

Aluminum AlSi10Mg Aluminum 6061 Titanium Ti6Al4V Stainless 316L Stainless 17-4 PH Tool steel & nickel alloys (project review)

Specifications

1 From 5 business days (express options where available)
2 ±0.3 mm or ±0.3% (whichever is greater), tighter after machining
3 420 × 420 × 450 mm (larger projects — contact us)
4 As-built grainy metallic; polishing, coating, or CNC finishing available
5 Required for overhangs; removed in post-processing

Design tips

  • Avoid unsupported overhangs below ~45° without fillets or lattice transitions.
  • Plan access for depowdering on blind cavities and narrow channels.
  • Specify critical fits and threads as secondary machining operations when needed.
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