ISO 4992-2:2006规定了高应力部件钢铸件（具有铁素体结构）的超声波检查要求，以及通过脉冲回波技术确定内部不连续性的方法。 ISO 4992-2:2006适用于通常经过晶粒细化热处理且壁厚不超过600 mm的钢铸件的超声波检查。对于更大的壁厚，有关试验程序和记录水平的特殊协议适用。 ISO 4992-2:2006不适用于奥氏体钢和接头焊缝。

ISO 4992-2:2006 specifies the requirements for the ultrasonic examination of steel castings (with ferritic structure) for highly stressed components, and the methods for determining internal discontinuities by the pulse echo technique. ISO 4992-2:2006 applies to the ultrasonic examination of steel castings which have usually received a grain-refining heat treatment and which have wall thicknesses up to and including 600 mm. For greater wall thicknesses, special agreements apply with respect to the test procedure and recording levels. ISO 4992-2:2006 does not apply to austenitic steels and joint welds.