Don't use gas welding rods for tig

[everlastsupport]

As well, in a pinch you can also use your aluminum MIG wire with the TIG.

[blasphemy000]

For welding sheet metal or other thin steel solid MIG wire works really well. Like the OP said though it is very hard to control being so thin. The mild steel TIG rods that I have are ER70S2 where as the solid MIG wire I got is ER70S6, I think that designates a higher silicon content, but it does work on thin steel very well if you can hold on to the thin wire. And just like using the ER70S6 MIG wire for thin steel, aluminum MIG wire works great on thin aluminum as well.

[jerky]

As well, in a pinch you can also use your aluminum MIG wire with the TIG.

or even better, when welding aluminum if you have any scraps or cutoffs of the actual base metal your welding, that is the best filler. sometimes it can be a pain working the scrap into something you can feed into the puddle, but putting base material back is the best. if you know, u have ran out of rod.

[everlastsupport]

Done that with steel. The same steel, you can not get any better than that. I had a trailer bed (expanded metal) and I use the X piece to finish it off, I was to lazy to walk over and get more filler rod.

[sportbike]

or even better, when welding aluminum if you have any scraps or cutoffs of the actual base metal your welding, that is the best filler. sometimes it can be a pain working the scrap into something you can feed into the puddle, but putting base material back is the best. if you know, u have ran out of rod.

For some alloys (including 6000 series) this is NOT recommend as it can lead to hot crasking issues. Welding of 6061 for example is usually done with 4043 for thinner materials, or 5356 filler for higher strength on thicker sections.

It may not be an issue for decorative items or items where stress is not a concern, however filler metals as recommended by the Aluminum Association or similar should be used for anything that is load bearing.

Also not a good idea for 4130 steel that will not be heat trreated after welding.