Tig Welding For Copper. It is different than steel but it is straightforward enough. The little details are various.
Tig welding on copper to aluminum will need a shielding gas which can be usually argon as it is been used widely on many occasions. For example in copper welding with a thickness of 5 mm TIG welding requires a preheating of 50 C and a protective argonhelium gas and mixing up to 300 amps of power. It is different than steel but it is straightforward enough.
Solid wires and rods for fusion welding of copper and copper alloys.
You havent given much detail on what you are welding but in general turn your heat up about 20 0 30 amps higher than you would for SS. Much of my art is welded copper. The surface must be cleaned thoroughly so as done in all other welding processes between dissimilar metals. In these instances the end-product determines what welding process is used with Stick MIG and TIG welding being the most commonly used welding processes for copper.