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

The correct work angle for a butt weld performed in the flat position is 90 degrees. This angle is crucial because it aligns the welding electrode or torch directly with the two pieces of metal being joined, allowing for optimal penetration and fusion of the base materials.

When performing a butt weld in the flat position, the welding arc is positioned perpendicular to the work surface. This results in a more stable and controlled weld pool, making it easier to achieve a high-quality weld with minimal defects. Additionally, a 90-degree work angle facilitates better visibility and access, allowing the welder to effectively monitor the process.

In contrast, other angles do not provide the same benefits for a flat position weld. For example, a 45-degree angle would be too steep, potentially leading to issues with the weld pool control and inconsistent penetration. Similarly, angles like 60 degrees and 75 degrees also compromise the weld quality by not allowing the welder to maintain the necessary control over the weld pool, which is best achieved at a 90-degree orientation.