Production, Metallurgy, and Utilization of High Manganese Nonmagnetic Steel—Its Development for the SSC Magnet

As a candidate of structural material for the SSC magnet cryogenic use, high manganese nonmagnetic steel (KHMN30L) has been developed to give several favorable results in terms of its production, metallurgy and usability. It is proved available to make a mass production of both 1.5mm and 2.5mm thick sheet coil. The suitable balance of nonmagnetism, strength and cryogenic toughness is achieved along with their sufficient stability and unformity. The material usability has been investigated to involve the experiment of semi-perforation / fine blanking of a collar with 2.5mm thick specimen currently manufactured at a factory.