Hello Bob,
I'm not exactly a newB to this group but I haven't watched or posted for about 8 years or so. I remember Ernie though.
On to your aluminum weld.
- 5052 is a MAG based high strength non heat-treatable AL alloy so your filler is correct. It starts to anneal at 650F so puddling around is not a good idea, I also would not pre-heat the structure.
- The 3/8" to 1/8" would require enough TIG (even pulsed TIG) energy that short cracking would be an issue making MIG or electrode the best choice. (NOTE.. I hate AL electrode but everyone should try it once.)
- If your 53XX wire is .035 you can successfully weld at around 120 to
- I agree with Ernie on the stitch weld with each joint divided at least
- Aluminum grows fast, but it also gives up retained heat to the air at approx 6 times the rate of iron based materials. Aluminum also responds well when the weldment is restrained as any upset of the material will occur within the weld and the HAZ.
- The guy a Oquaqua boats probably would just attach a strong-back to the
- The torch should be angled at least 20 degrees (some go 30 to 45 degrees) in the direction of travel (push angle) and the travel speed of at least 1 inch every 3 seconds is important.
- On a 3/8" test piece get your volts up to reduce spatter and soot. With
I'll check my docs' at the shop and post back on the wire feed and volts but you've probably already finished the job by now...
Matt