👉 Welds are a type of fastening method that involves two or more pieces of metal being joined together using heat to permanently hold them in place. They can be used for securing various types of objects, such as pipes, cables, and other materials, and are often used in construction, automotive manufacturing, and aerospace industries. Welds can be classified into different types based on their method of joining the pieces of metal: mechanical welding, chemical bonding, or electrochemical bonding. Mechanical welding involves