Robuta

https://www.nokia.com/bell-labs/publications-and-media/publications/substitution-of-laminated-low-carbon-steel-for-silican-steel-in-the-cores-for-wire-spring-relays/ Substitution of Laminated Low-Carbon Steel for Silican Steel in the Cores for Wire Spring Relays |... This article describes the analytical and laboratory studies undertaken to determine if low-carbon steel could be substituted for the more expensive 1 per cent...