本文件规定了FMC/TFM技术在混凝土超声波检测中的应用 最小厚度为3.2 mm的金属材料熔焊接头。它只适用于 使用金属制造的焊接件，可实现各向同性（所有材料的恒定特性 方向）和均匀条件。此类材料包括低碳焊缝 合金钢和普通航空航天级铝和钛合金，前提是 均匀的和各向同性的。

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.