What type of testing is NOT acceptable when performing procedure qualification for automatic welding?

When performing procedure qualification for automatic welding, electromagnetic testing is typically not an acceptable method. Procedure qualification emphasizes establishing the reliability and quality of the welding process and the welds produced.

Visual inspection is a widely accepted method for assessing the appearance and general quality of welds without causing any damage. It helps identify surface defects easily.

Destructive testing is integral to assessing the mechanical properties of welds, as it involves testing specimens beyond their yield strength, providing insight into how the materials will behave under stress.

Nondestructive testing methods, which include techniques like radiographic testing, ultrasonic testing, and magnetic particle testing, are also vital in procedure qualification as they allow evaluation of weld quality without damaging the workpiece.

In contrast, electromagnetic testing techniques, while useful for some applications, do not typically demonstrate the weld's integrity and mechanical characteristics necessary for the qualification of automatic welding procedures. This is why it is not considered an acceptable method in this specific context.