2 tips in this video are:
- How to get full smooth penetration on a thin aluminum butt joint.
- How to avoid porosity on an aluminum weld that will be machined.
For full penetration butt welds on aluminum
- Clean both sides and edge
- Tight arc
- #5 cup can help
Avoiding porosity on aluminum that gets a final machine
- Clean metal and wipe with acetone
- Preheat to around 200f
- Set AC balance to more cleaning
- 4047 filler helps if permitted
- For castings, let the cleaning action work a bit before puddling.
