"Rev. Kenneth Alan Burch B.Th." wrote:

For TIG welding Inconel, use argon gas in the torch and you must use a backup gas
of argon also underneath the weld.

Well if you are working to full welding specs. But if not a highly stressed, or
rotating part I would not worry about the lack of back up gas or use of a purge box.

. The rod must

match the parent metal.

Yes and no... It depends...
What alloy being welded and what are the properties desired? Many satisfactory
weldments can be made with a mismatch in type or alloy.

It must be tacked together first, using backup the whole

time, then welded in sections to keep it from warping. Inconel welds very slowly
so take your time and wait for it to penetrate. The metal should be prepped prior
to tacking.
Good luck
Ken

Most Inco alloys are a joy to weld. Actually, I'd say that it is generally easier for a
novice to learn on than Aluminum.

Any standard welding procedure should include cleaning and proper welding techniques,
but that FILLS books and years...

Blake Mantel

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