What is a weld used to fill a corner joint called?

A weld used to fill a corner joint is called a fillet weld. This type of weld is specifically designed to join two surfaces at a right angle, characteristic of corner joints. Fillet welds are commonly used in various types of metal fabrication and construction, as they effectively provide strength and support to the joint, ensuring the connection between the two pieces is robust.

Fillet welds are typically triangular in shape when viewed in cross-section, which allows them to distribute the load evenly across the joint, thus reinforcing the connection. This makes them particularly suitable for applications where strength is crucial and where the components being joined are at perpendicular angles.

In contrast, groove welds are used to join pieces that are aligned edge-to-edge rather than at a corner. Butt welds are intended for joining two pieces of material end-to-end, and tack welds serve as temporary joints to hold pieces in place prior to full welding. Understanding the specific functions of these different types of welds is essential in selecting the appropriate technique for a given application.