Due to the long history of railroad companies around the
world, varying means of examination according to the
specifications for the different railroad components have
been carried out based on the general industrial progress of
the country [1–3]. For more than 50 years the application
of customized ultrasonic techniques for the examination of
railroad components has increased, in comparison to
conventional ultrasonic techniques used until the end of
20th century. In this traditional atmosphere some accidents
have disturbed the silent harmony of companies involved in
the production of critical parts. More than ever high-speed
modern trains require modern and advanced examination
techniques [4–11]. For practical application new ultrasonic
and eddy current techniques [12–14] have been developed
and optimised in cooperation with Die Bahn AG (German
railroad carrier). In the present contribution the inspection
of railroad wheels and the railway track gauge corner will be