For most thin section copper welds, Argon shielding gas is perfectly adequate. However, when trying to weld thicker sections or joints with difficult geometry, the advantage of the increased heat input of Helium when trying to fuse copper will become evident. Penetration would be offset by the increased thickness of the joint and arc characteristics would not be really different to be noticed,cost would prop be the most noticeable consideration!
Thanks 46.00,
That's what I wanted to know. No more than I would use it in my circles I will probably forget it before I get to use it but it is still good to know and maybe someone reading this can make quick and good application of the information.
Have a Great Day, Brent
46 makes a strong point.
Helium is an advantage.
But that advantage may or may not be reasonable, depending on things like thickness and number of welds required.
If I were making hundreds/thousands of welds, Helium could be worth the trouble, even on sheet or gauge thicknesses. Also there are thicker sections or complex castings where a GTAW weld just might not be made without He. That little punch He gives can make a big difference sometimes.
On the other hand if I have a short run or just a couple of welds that are non-critical.. GTAW with Argon is perfectly fine.
By DaveBoyer
Date 08-11-2012 01:46
Edited 08-11-2012 01:49
Since HELIUM has been mentioned, what is the availability situation for all of You in various arieas ?
My friend with the garden center is the area FTD florist, and sells helium balloons & cards as well as flowers as part of the deal.
He got a letter from Airgas stating that they will not be able to supply helium to non contract customers, and some other information explaning the present helium shortage.
He recieved similar notice a few years ago in a previous helium shortage.