What is a typical acceptance criterion for undercut in welded joints per AWS D1.1?

The typical acceptance criterion for undercut in welded joints as per AWS D1.1 specifies that the depth of undercut must not exceed 1/32 inch (0.8 mm). This criterion ensures the structural integrity and performance of the weld by limiting the potential for stress concentrations that could lead to premature failure. Keeping the undercut within this maximum depth helps maintain the strength and quality of the welded joint, which is crucial in structural applications where welding defects can have significant repercussions.

Determining acceptable limits like this is part of maintaining quality control in welding practices, as excessive undercut can weaken the welded area and increase the likelihood of cracking or other failures over time. Therefore, adherence to this specific dimension is vital for the safety and durability of welded structures.