In which position is arc welding most commonly performed?

Arc welding is most commonly performed in the flat position because this orientation typically allows for better control of the welding process and more consistent weld quality. When welding in the flat position, the gravitational forces aid in maintaining a uniform weld pool and make it easier to manipulate the welding electrode. This position minimizes the risk of issues such as slag inclusion or excessive spatter, which can occur more frequently in other positions. Additionally, welders can generally achieve higher travel speeds and better penetration in the flat position, making it the preferred choice for many welding applications.

While other positions like vertical or overhead have their uses in specific scenarios, they often require more advanced skills and techniques to achieve the same level of quality and efficiency that can be achieved in the flat position. Therefore, the flat position is widely recognized as the most common and advantageous position for arc welding tasks.