[bb1127]

Hello to all, I have a job welding 1/2” stainless and was wondering if anyone could give me some advice on weld settings and tungsten and cup size? Will I need tungsten bigger than 3/32?
Thanks

[cj737]

Plate? Tubing? Pipe? Application? Position?

3/32 tungsten is fine.
#8 or larger cup (me, I'd use a ceramic #12 Fupa)
Purge line and tinfoil at the ready.
Can't know the amps without the other details.

[bb1127]

It is plate, fillet welds flat on a table.

[Poland308]

Is it beveled or just 2 plates flat togeather? Do you need full penetration? Can it be welded from both sides?

[bb1127]

It is not beveled but it can be if I need to. Full penetration. Yes it will be welded on all sides.

[cj737]

Like pulling teeth...

[BillE.Dee]

Ever hear of pocket teeth?

[tungstendipper]

Like pulling teeth...

LOL!

[bb1127]

Thanks guys y’all have really helped clear the water.

[weldin mike 27]

In Australia we would never dream of welding stainless that thick with the tig. Mig all the way. Maybe even a dual shield flux core.

[bap_]

The do make 308L stick rods and MIG wire for $$$.

[weldin mike 27]

Amazing what you can get in exchange for legal tender.

[VA-Sawyer]

Unless you have a free source of Stainless tig rod, I think the cost of filler will be similar across the three methods. Time required will be the big factor.

[bap_]

1/2 plate/bar is pretty doable with a good bevel/multipass weldment. So agreed, pretty much any process will do the job. Tig is what I would go for with stainless. Fit-up really tight.

[weldin mike 27]

Don't forget it's a fillet weld. I know it's a thing in the USA, but we hardly ever see structures welded with tig. Only pipes.

[noddybrian]

Norm in the UK for structural in 1/2" would be stick unless it's a high volume repetitive part - then Mig.