Inconel

**Tabber05** · 04-01-2010, 05:07 PM

Hi all,

Any of you guys TIG welded "Inconel 600 sheet" x 2mm thick
Looking for info on DOs and DON'Ts.

Thanks
TabberGreenSmoking

**Gadget** · 04-01-2010, 05:28 PM

Here is a PDF on Inconel with welding instructions near the bottom. Hope it helps.
Dan

**Tabber05** · 04-05-2010, 07:45 AM

Thanks for the info.
Enough there to write a small book.

**Gadget** · 04-05-2010, 08:17 AM

It really is but there is a paragraph or two near the bottom covering welding making it worth at least skimming through.
Dan

**ISKI** · 08-21-2010, 07:45 AM

I have only welded short pieces, but I treated it like it was stainless steel. I have two argon tanks, and made a cardboard box for the back with a second feed so the joint was completely covered. I always wanted to make a large glass box to put around the weld area to keep it flooded with argon.

**WookieWelding** · 02-12-2011, 11:06 PM

i weld inconel and monel with 90% argon 10 percent ultra pure helium with a back purge of 100% argon you kind of have to stay on the filler cause the puddle doesnt really like to flow its very sluggish

**SICFabrications** · 02-12-2011, 11:11 PM

do you like the 10% helium mix, wookie? have you tried a heavier mix, like 75/ 25 helium over argon with a argon backpurge? ive had good results this way, but helium is retarded expensive....

**WookieWelding** · 02-12-2011, 11:28 PM

Originally Posted by SICFabrications

do you like the 10% helium mix, wookie? have you tried a heavier mix, like 75/ 25 helium over argon with a argon backpurge? ive had good results this way, but helium is retarded expensive....

i run a mixer so i can change mixtures on the fly i use the 10% on the thinner stuff and 15-25% on thicker material depends on what kind of penetration i am getting on said material and yes ultra pure helium is retarded expensive but so are any Ultra Pure gases for that matter
i have run 75/25 H over A on Aluminum will have to play around with that mixture on Inconel

**SICFabrications** · 02-12-2011, 11:40 PM

let me know if it works better.... ive always been told that helium puts more heat into the actual weld and makes the puddle a little more fluid.... i dont have a mixer, i have to buy the bottles pre-mixed. if you cant really tell much difference, i'll be switching pre-mixes.... quickly

**WookieWelding** · 02-12-2011, 11:57 PM

Originally Posted by SICFabrications

let me know if it works better.... ive always been told that helium puts more heat into the actual weld and makes the puddle a little more fluid.... i dont have a mixer, i have to buy the bottles pre-mixed. if you cant really tell much difference, i'll be switching pre-mixes.... quickly

The more Helium you add to the mix the Heat/penetration goes up .. I try to use only as much helium as required to get the penetration i am trying to achieve without getting a Weld that is too hot also in that keeping the HAZ to a minimum
The puddle is still going to be sluggish that just the way the base material reacts when welded.. in theory with a higher mix you are going to be getting a Bigger HAZ
I can turn my mixer up to that ratio and confirm when i get back to work