Method to calculate ultrasonic wave velocity by using chemical composition of austenitic stainless steels

Abstract

Various kinds of austenitic stainless steel have been used in oil refineries and chemical plants, and a value of ultrasonic wave velocity is necessary for not only thickness measurement but also evaluation of material deterioration. Although ultrasonic wave velocity depends generally on chemical composition, material structure, grain size, etc., it is hard to study the influence of all factors for calculating ultrasonic wave velocity. Therefore, we noticed the chemical composition of materials only. Since ultrasonic wave velocity depends generally on parameters such as density ρ, Young’s modulus E, and Poisson’s ratio ν, we calculated these parameters by using material data of respective elementary substances. Then, we have investigated the relationship between the calculated values of ultrasonic wave velocity and the experimental ones measured by ultrasonic testing.