Ra330/inconel Tig

[jasowiii]

Does anyone have any experience welding Inconel or RA330? I am building a couple of small (8"x8") torts (boxes) out of 0.091" RA330 sheet and some 1/2" schedule 40 pipe. I am hoping that it welds like stainless??? I do not no the best electrode, shield gas or other parameters. I have an old AIRCO 300.

They will be used in a furnace so any technic/process info that results in a weld more capable of handling extreme thermal cycles would be great.

Any info would be very helpful.

Jimmy

[metal tech]

this is a general Inconel answer, since I don't have a book at home that tells me what RA330 crosses to. I've welded Inconel 718 many times. The weld pool is what I call "muddy" it has oxides that float in it. I consider it to weld good overall. We use 100% argon gas. As far as lasting in a furnace environment, depending on the max temp you expose it to it should last. Inconel has been used in the afterburner area of jet engines.

Al

[dseman]

Originally posted by metal tech
The weld pool is what I call "muddy" it has oxides that float in it.

I've not welded inconel before, but I've heard from others within the aerospace industry that they will adjust the ac balance of their dynasty or aerowave to about 98% dcen. The small amount of dcep removes the oxides in the pool and it becomes quite clear. If you have a machine with agressive balance control, you may want to try this.

-dseman

[metal tech]

dseman, I read that info in the other thread you posted, good info. This is the first AFB I've been at that has had an Aerowave. Most times you'll find a Syncrowave 350, 250 machines, and these don't have that adjustability. I've used what I've read here and the owners manual and enjoy the added control the Aerowave offers.

Al

[Guest]

Rolled Alloys RA330 is a high heat resistant stainless used in furnace applications. It welds like any 300 series stainless, and has a unique ability to get stronger above 1500 degrees. It must be welded with RA 330 wire, and it doesn't cross with any other alloy...it's in a class by itself.

[L.U.572]

?

I have been welding on a lot of Inconel @ work. We use 82 and 625 wire. It's hard to explain. Parts of the weld will be real shiny and other parts mostly around the edges looks like it has a film or something on it. If anyone knows can help me i would appreciate it.

[Guest]

I have been welding on a lot of Inconel @ work. We use 82 and 625 wire. It's hard to explain. Parts of the weld will be real shiny and other parts mostly around the edges looks like it has a film or something on it. If anyone knows can help me i would appreciate it.

I see that too, and just take it as normal. It never stopped a certification test I did.

[Bob the Welder]

Posted by L.U.572;

It's hard to explain. Parts of the weld will be real shiny and other parts mostly around the edges looks like it has a film or something on it.

My experience exactly. Just learned to live with it.

[snoeproe]

this is a general Inconel answer, since I don't have a book at home that tells me what RA330 crosses to. I've welded Inconel 718 many times. The weld pool is what I call "muddy" it has oxides that float in it. I consider it to weld good overall. We use 100% argon gas. As far as lasting in a furnace environment, depending on the max temp you expose it to it should last. Inconel has been used in the afterburner area of jet engines.

Al

Inconel is also found in many boilers/pressure vessels.

[heidy_james]

This is a revealing site, which have the most up-to-date news and links. The perks are endless of this handy site. Thanks for giving out this info; it’s really precious for me.

[Guest]

Welcome to the forum heidy, there is a lot of good information here, and we have some fun, too. So join in with your questions, and share your experience. There's no such thing as a dumb or stupid question....we have all had them at one time or another....glad to have you aboard!

[azmac54]

welcome back!

Welcome to the forum heidy, there is a lot of good information here, and we have some fun, too. So join in with your questions, and share your experience. There's no such thing as a dumb or stupid question....we have all had them at one time or another....glad to have you aboard!

Nice to see your smiling face again Rocky. You must be feeling better- I hope. I look forward to reading your knowledgable comments.
Jim

[frankcc]

Inconel Welding

I have been welding on a lot of Inconel @ work. We use 82 and 625 wire. It's hard to explain. Parts of the weld will be real shiny and other parts mostly around the edges looks like it has a film or something on it. If anyone knows can help me i would appreciate it.

I found that inconel welds better when you cool each pass. I like to use the biggest cup allowable for the joint with plenty of shielding.
I weld mostly with inco 82. The joints consist of an open root with backing gas. The fill passes always run better when you cool each pass. I run stringer beads versus the weave. This allows you to move the puddle quicker and avoids the heat buildup that will turn the weld grayish looking.
This works for me. I weld Inconel 800 on a daily basis.

Hope this Helps

FrankCC

[kcd616]

I found that inconel welds better when you cool each pass. I like to use the biggest cup allowable for the joint with plenty of shielding.
I weld mostly with inco 82. The joints consist of an open root with backing gas. The fill passes always run better when you cool each pass. I run stringer beads versus the weave. This allows you to move the puddle quicker and avoids the heat buildup that will turn the weld grayish looking.
This works for me. I weld Inconel 800 on a daily basis.

Hope this Helps

FrankCC

I have weld inco alot and cooling it does help alot for a clean look also if it is pipe after the root you can continue to run the purge gas to help with the cool slightly and keep a clean nice color on the inside of the root pass.
Also run a little more gas has worked for me.
Sincerely,
Kent