lincoln le31mp porosity on welds

Lisa Allen · 2025-06-07T10:23:00-04:00

i’m a little bit confused cause my Lincoln LE31MP leaves porous welds on aluminum with 0.035-inch mig wire at 20 CFH argon, welds look bad. Can you give me a solution to this?

This topic has 3 replies, 4 voices, and was last updated 6 months, 1 week ago by Sharon Bradley.

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- June 7, 2025 at 10:23 am #53441
  Participant
  Lisa Allen
  i’m a little bit confused cause my Lincoln LE31MP leaves porous welds on aluminum with 0.035-inch mig wire at 20 CFH argon, welds look bad. Can you give me a solution to this?
- June 7, 2025 at 3:51 pm #53443
  Participant
  Angela Ramirez
  Check for gas leaks on your Lincoln LE31MP, use 25 CFH argon, fixes porosity.
- June 7, 2025 at 10:07 pm #53444
  Participant
  Katherine Fernandez
  Clean aluminum with alchohol before welding, dirty metal causes porosity, use fresh mig wire.
- June 8, 2025 at 3:40 am #53445
  Participant
  Sharon Bradley
  Use gas lens on your Lincoln LE31MP, improves argon coverage, set flow to 22 CFH.
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