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.