In steam reformer tubes centrifugally cast materials, namely HK40, HP Modified, and Micro-Alloy materials, are used for tube materials. The material undergoes various stresses resulting in damage which can manifest itself in several ways. The quantification of damage is of vital importance if tube life is to be predicted accurately. A comprehensive inspection system has been developed to assess the exact degree of damage. The technology utilizes several NDE techniques, including ultrasonic and eddy current.