Millennium Force Millennium Force Millennium Force is a steel roller coaster located at Cedar Point amusement park in Sandusky, Ohio. Manufactured by Intamin, it was the park's fourteenth roller coaster dating back to the opening of Blue Streak in 1964. Upon completion in 2000, Millennium Force broke six world records and was the world's first "giga coaster", a term coined by Intamin and Cedar Point to represent roller coasters that exceed in height and complete a full circuit. It was briefly the tallest and fastest in the world until Steel Dragon 2000 opened later the same year. The ride is also the
MKM steel MKM steel MKM steel, an alloy containing nickel and aluminum, was developed in 1931 by the Japanese metallurgist Tokuhichi Mishima. While conducting research into the properties of nickel, Mishima discovered that a strongly magnetic steel could be created by adding aluminum to non-magnetic nickel steel. The developers claim MKM steel is tough and durable, inexpensive to produce, maintains strong magnetism when miniaturized and can produce a stable magnetic force in spite of temperature changes or vibration. MKM steel is similar to Alnico. MKM is an acronym for Mitsujima ka magnetic, 'Mitsujima ka' being the name of the inventor's childhood home.