If a groove weld has a stated size, what kind of penetration is typically expected?

In the context of groove welds, when a specific size is indicated, it typically implies that the weld is designed to create a certain amount of fusion and metal deposition between the joint edges. When we refer to a "stated size," it usually pertains to the nominal size of the weld, which is the amount of weld metal deposited.

A partial joint penetration indicates that the weld does not extend all the way through the thickness of the base materials but adequately fuses to the root of the joint. This type of penetration is common for groove welds, especially in applications where complete joint penetration is not necessary or where the joint configuration does not allow for maximum penetration.

The other options would indicate different levels of penetration or types of welds. A complete joint penetration corresponds to a weld that fully penetrates the joint, which may not always be the case for groove welds with a specific stated size. Deep penetration suggests extensive fusion beyond what is typically expected with a stated size. Finally, no penetration would indicate that the weld has not fused with the base material, which is contrary to what a stated groove weld size indicates. Therefore, recognizing that a stated size generally demonstrates an aim for certain penetration depth and weld quality supports the idea of partial joint penetration as