All standard welding processes, including TIG, MIG, and stick, are capable of welding carbon steel pipes to stainless steel pipes. The standard carbon E-class welding electrodes, such as E70 for MIG and 7018 for stick, will hold the pipe together but will not allow for the inclusion of nickel or chromium in the alloy.
To seal the joint, a high-carbon stainless metal electrode is required. The 309 welding electrodes have the right composition to ensure proper penetration and structural integrity. You can find more about shielded metal arc welding via various online sources.
The wire cutters can be used to cut the ends of the welding wire sticking out from the welder's welding tip. To remove the wire from both the MIG gun's lead and the welding wire, back-spool it. The spool of wire should be removed. The 309 welding wire should be spooled into the welder.
The three-part shielding gas mixture should be used to exchange the gas. To ensure that the gas mixture is thoroughly mixed, place the gas bottle on its back. Roll the tank around for 2 minutes before attaching the three-part shielding gas. Attach the gas gauges and the three-part gas bottles.
Turn on the welding machine and adjust the wire speed and heat. Your standard settings for carbon steel heat will not be sufficient due to the greater heat needed to weld stainless steel.
To determine the initial setting for your heat or wire speed, consult your welding guide. To ensure the settings are correct, run a test pass together with your welder.