The charts on the following page will be of help in determining the best combination of stud weld base size and base metal thickness. The terms on the chart are defined as follows:

EXCELLENT- No marking, excellent weld.
ACCEPTABLE- Visible markings, excellent weld.
UNACCEPTABLE- Unacceptable marking, base metal failure.

It should be noted that these charts are based on optimum laboratory conditions. Even under optimum conditions, it is difficult to determine the precise point at which reverse-side marking will appear. Therefore, these charts should be used only as a guide.