  Results of testing modified components for the cryomodule of the
International Linear Collider (ILC) are summarized. To reduce the ILC project
cost, it is proposed to replace titanium cryomodule components with stainless
steel (SS) ones. New bimetallic transitions Ti_SS, Nb_SS have been produced by
a unique method based on explosion welding. Successive upgrading of these
components to the latest version of the Nb/Ti/SS transition element has led to
improvement of the ILC cryomodule. This new component resolves problems of
residual stress, and its specific design prevents the possibility of a shift
due to the difference in the linear expansion coefficients of the constituent
metals. Leak tests with the He gas revealed no leaks at the background rate of
0.2x10-10atmxcc-1s. The test results are very encouraging. The up-to-date
design of trimetallic Nb_Ti_SS element promises technologically simpler and
less expensive manufacture. Investigations have shown that explosion welding
allows unique trimetallic components to be made not only for cryogenic units of
accelerators but also for laboratory equipment and for general engineering
applications.
