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Materials

Can you laser welding aluminium?

Quick answer

Yes — yes, with wire feed and care on reflectivity. Laser on aluminium: match technique to the material; filler ER4043.

· · Technical guidance compiled from trade practice and manufacturer data; our source-verification program is in progress — see our editorial policy.

The verdict and why

Yes, with wire feed and care on reflectivity. Oxide melts at ~2000°C while the metal underneath melts at ~660°C — cleaning and AC balance are everything

Watch-outs

  • stainless brush the oxide layer off right before welding — it reforms within hours
  • Prep: stainless brush the oxide layer off right before welding — it reforms within hours

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