What is the correct work angle for a butt weld in the flat position?

The correct work angle for a butt weld in the flat position is 90 degrees. In the flat welding position, the surface to be welded is horizontal, and the welder holds the welding torch or electrode at a perpendicular angle to the workpiece. This 90-degree angle effectively allows for optimal penetration, ensuring that the weld metal properly fuses with the base metal on both sides of the joint, which is essential for achieving a strong and durable weld.

Using a 90-degree work angle also helps in controlling the heat input and minimizing the risk of defects, such as undercut or incomplete fusion, which can occur if the angle is too steep or too shallow. Proper adherence to this angle is a vital skill for welders to master, as it directly affects the quality and integrity of the weld.