When welding replaced riveting in warships

When did welding replace riveting as the main construction method on warships?

Broadly during the 1930s, at different rates in different navies, while riveting remained valuable for wartime repair work.

Adoption depended on more than learning to weld a hull: navies also needed design methods, production experience, and repair practices suited to welded construction. Treaty displacement pressure drove early Royal Navy use, especially in the Illustrious-class carriers. Larger American investment did not immediately produce the same construction timetable. Welding could become the dominant method while an older, readily repairable technique remained useful.