The type of application that the spring is to be used in will of course determine life expectancy, performance requirement and, depending on what the life expectancy might be, the type of material used. A typical application for a compression spring in an engine valve might involve 8,000 cycles per minute and the best material to guarantee this sort of performance is chrome silicon.
Arriva makes £300m tri-mode train order with Hitachi Rail
This development shows up the lack of a comprehensive nationwide network of electrified lines for passenger services and freight The glacial speed of...