Radiographic Testing is a non-destructive method using x-rays or gamma rays to detect sub-surface discontinuities.
Radiographic testing can obtain a permanent image of a surface or sub- surface flaw, and can measure the size and shape of the discontinuity. Radiographic testing is commonly used on metallic and non-metallic materials to examine welded parts, cracks and density changes, wall thickness measurement, corrosion mapping. castings, forgings and measuring porosity.