Welding copper to copper is a common task in plumbing, electrical work, and other metalworking applications. Copper is a relatively soft metal, making it easy to weld, but it is also a good conductor of heat, so it is important to use the correct welding techniques to avoid overheating the metal and damaging it. There are two main types of welding that can be used to weld copper to copper: gas welding and arc welding.
Gas welding is a type of welding that uses a fuel gas, such as acetylene or propane, to create a flame that melts the metal. The welder then uses a filler rod to add molten metal to the joint and create a strong bond. Gas welding is a relatively simple and inexpensive welding process, but it is not as strong as arc welding.