ASTM International Standard Practice for Measuring Ultrasonic Velocity in Materials ASTM E494-05

This practice covers a test procedure for measuring ultrasonic velocities in materials with conventional ultrasonic pulse echo flaw detection equipment in which results are displayed in an A-scan display, and describes a method whereby unknown ultrasonic velocities in a material sample are determined by comparative measurements using a reference material whose ultrasonic velocities are accurately known. The ultrasonic testing system that shall be used shall consist of the test instrument, search unit, couplant, and the standard reference blocks. The test procedure shall include both longitudinal and transverse wave velocity measurements, which should conform to the theoretical values of the parameters.