ASTM E 1315 - 93. Standard Practice for Ultrasonic Examination of Steel with Convex Cylindrically Curved Entry Surfaces

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American Society for Testing and Materials (ASTM). 1993, 4 pages.
This practice describes the selection of single element hard face ultrasonic search units for which flat-entry-surface calibration blocks can be used for examination of steel with convex cylindrically curved entry surfaces