Embodiments of the method and system provide for network support for call record privacy in a telecommunication system. However, when this type of information is stored digitally, the risk of data piracy will increase. The duct detector has a rod with a first and a second end where the first end is distal the second end. The alloy can be obtained by subjecting the alloy to high-speed plastic working in the cooling process, after the alloy has been held in an equilibrium temperature range of the phase or the phase.