1.1 This guide 2 covers techniques for both dry and wetmagnetic particle testing, a nondestructive method for detect-ing cracks and other discontinuities at or near the surface inferromagnetic materials. Magnetic particle testing may beapplied to raw material, semifinished material (billets, blooms,castings, and forgings), finished material and welds, regardlessof heat treatment or lack thereof. It is useful for preventivemaintenance testing.
