Q&A topic

Flux-core welding: 10 questions answered

• Is gasless MIG actually any good?

  Yes — self-shielded flux-core is a legitimately good process for the right jobs: outdoor and windy work, dirty or painted steel, a…

• How does flux-core welding work?

  Flux-cored arc welding (FCAW — gasless MIG): a hollow wire with flux inside generates its own shield — MIG-style trigger action wi…

• What is flux-core welding used for?

  Flux-core welding is used for windy outdoor work, dirty steel, farm repairs and beginners who work outside. In Australian terms: f…

• How hard is flux-core welding to learn?

  Flux-core welding is as easy as MIG to start, with more spatter and slag to manage. Expect same-day usable beads.…

• Why does flux-core welding not need gas?

  Flux-core welding needs no bottled gas — the hollow wire's flux core generates its own shield as it deposits.…

• What thickness can you weld with flux-core welding?

  Gasless flux-core handles 1.5 mm to 6 mm+ depending on machine class; it penetrates deeper than gas MIG at the same amps on thicke…

• Common flux-core welding mistakes and how to fix them

  The most common flux-core welding mistakes: wrong polarity; dragging the gun like stick; leaving slag-capped wormholes by welding …

• Can you do flux-core welding outdoors?

  Yes — gasless flux-core was built for it. No bottle, no shield to disturb; it's the default recommendation for paddock and fence w…

• Push or pull: which technique for flux-core welding?

  Always drag gasless wire: a 5–15° drag angle keeps the slag forming behind the puddle. Pushing traps slag into the weld — the clas…

• What settings for 3 mm steel on Flux-core?

  For 3 mm mild steel on Flux-core: 110–150 A on 0.9 mm gasless wire — set per the wire packet, and expect to drag with a short stic…