This document specifies an A-type ultrasonic pulse contact method applying the ultrasonic longitudinal wave technique to hardmetals.

This document is applicable to the ultrasonic inspection for a hardmetal rod that has a circular end face with a diameter not less than 6,0 mm and a rod length of 40,0 mm to 380,0 mm, or a hardmetal product that has a non-circular testing area not smaller than the coverage area of the probe (not less than 12,0 mm in diameter) and a height of 10,0 mm to 380,0 mm.

Within the detection range specified in this document, the sound transmission energy is expressed by the probe driving voltage, and the range is 100,0 V to 200,0 V.