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Helium mixed gas for copper mig welding

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Helium mixed gas for copper mig welding

Postby Welderhayden » Sun Oct 22, 2017 6:04 pm

Hi,

Has anyone used mixed helium gas say 50/50 or 80/20 helium/argon to weld copper about 10mm too 25mm thick (1/2inch- 1inch)

Some context, the welding is just rebuild work on copper lances that are used to deliver oxygen into a furnace, current repair procedure is to just heat until red hot and weld with "cu-si" wire and 100%argon, problem is you can never be sure you are really fusing into the copper and the weld always looks cold no matter how high you turn the machine up.

I will attach a photo soon hopefully give a better idea
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Re: Helium mixed gas for copper mig welding

Postby Welderhayden » Sun Oct 22, 2017 7:15 pm

Standard hole to be filled in
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