Laser welding
What gas does laser welding use?
Quick answer
Laser welding uses nitrogen or argon at 15–25 L/min.
Gas or shielding detail
Flow rates for laser welding: nitrogen or argon at 15–25 L/min. Nitrogen is the economical default for steel; argon gives slightly cleaner welds on stainless. Flow matters more than people expect on lasers — turbulence pulls in air at high travel speeds.
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