This document specifies the application of the FMC/TFM technology for the ultrasonic testing of fusionwelded joints in metallic materials of minimum thickness 3.2 mm. It's is applicable only to components with welds fabricated using metals which lead to isotropic (constant properties in all directions) and homogeneous conditions. These classes of materials include welds in low carbon alloy steels and common aerospace grade aluminum and titanium alloys, provided they are homogeneous and isotropic.