... Behavior of Steel Materials a. The operating service temperature of a steel structure has a significant effect on the fracture behavior of the steel. For low- and intermediate-strength steels, ... inspection of welds. The most commonly used frequencies are between 1 and 5 MHz, with sound beams at angles of 0, 45, 60, and 70 degrees. During application of the method, all surfaces of the part ... the capacity of test equipment, the weldment is divided through its EM 1110-2-6 054 1 Dec 01 5- 5 (5) Fracture characteristics of a material are also related to the appearance of the fractured...