Welding Tips and Tricks

I am getting ready to take a test with 2 inch pipes .154 thickness in the 6g position, can someone help me & tell me how much heat should I use because I'm not used to welding copper nickel pipe with tig, thanks in advance

You say copper nickel 2"x .154 wall. Does this mean you intend to braze weld it as in a square butt or silver solder a capillary joint. What filler are you using? More info please.

I've never done it, damnit, but I'll clarify for others before confusion starts...

Cu-Ni (copper-nickel) can probably be brazed, but is most commonly welded.

I've been told the settings are similar to stainless of the same sizes, and to expect a "dead" puddle, that does not wet out readily, requiring more torch manipulation while feeding rod.

I think there is Cu-Ni experience here, so be patient. Maybe the guru will comment, as well.

Steve S

Does'nt help much but assuming this is similar to the alloy widely used in the UK called " Kunifer " I've done plenty in sizes from 1/8" up to 4" ( very common in heat exchangers & low volume boilers ) - but it's always been silver soldered - I never heard of it being welded - I guess as both base metals weld then the alloy should as well - if I get time I might try a bit - think there's half a length of 4" still on the metal rack if it will clean up - when silver soldering it unless it's really new & spotless it's normal to clean it with " spirit of salts " first.

In the US, the most adverts I see for Cu-Ni welding are shipyard jobs, and my assumption is it has to do with moving steam around.

Steve S