T.O. 33B-1-11-551.8.1.5AngleBeamBlocks.There are two types of angle beam calibration blocks included in TA 455: the miniature block and the InternationalInstitute of Welding (IIW) block Type 2 (see Figure 1-11). Either of these blocks may be used to perform the followingfor angle beam transducers: check the refracted angle of the sound beam, check the point-of-incidence of the refractedsound beam and calibrate the sweep of the ultrasonic instrument. Note also within these paragraphs are procedures forcharacterizing and calibrating straight beam transducers. Angle beam blocks made of aluminum and steel arestandard. Other materials may be specifically ordered. Shear wave velocities for titanium and aluminum are close soaluminum blocks may be used for shear wave inspection of titanium. However, adjustments in distance calibration mayhave to be made.
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