Use the proper gas ratio.
Welding copper pipe with tig.
In the past we have.
The oxygen will corrode your weld bead under the heat of tig welding.
As a general rule of thumb copper under 2 mm should have argon gas and up to 160 a applied.
Tig welding copper pipes 22 x 1 mm.
152 4 to 304 8 mm away from the weld.
In welding copper sheets the heat is conducted away from the welding zone so rapidly that it is difficult to bring the temperature up to the fusion point.
I am an experienced 6g pipe welder with certs in both stick and tig.
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Oxygen free copper doesn t have this problem and it takes tig welds beautifully.
Some grades of copper have oxygen dissolved in the metal.
It is often necessary to raise the temperature level of the sheet in an area of 6 0 to 12 0 in.
виг заваряване на медни тръби 22 х 1мм.
For example in welding copper with thickness of 5mm 0 196 inch tig welding requires a preheating of 50 c as well as shielding gas of argon helium and mix up to 300 amps of power.
Whereas mig welding requires a preheating of 10 100 c and up to 240 amps of power with argon as its shielding gas.
If you are tig welding copper buy oxygen free copper.
Buy the right copper.
Depending on if you are using tig tungsten inert gas or mig metal inert gas and the thickness of your copper you will need to adjust the ratio of your gas and temperature.