A novel hub integrated brake disc is developed aiming reduction of its manufacturing cost and weight. This hub integrated disc is made of two different ferrous casting material of gray iron and ductile iron by specific dualcasting process and pattern design. As the friction part of the disc is closely related to performance and NVH in braking, it is normally made of gray iron. In the other hand, the hub integrated hat part is closely related to braking torque and the toughness. it is normally made of ductile iron. Specific time duration is required when pouring ductile iron after gray iron melt is poured into the mold to form stable interface between gray iron and ductile iron parts. In the green sand mold, two inlets are embodied to take two different types of casting melts into the mold. More accurate casting interface can be achieved by imparting melt reservoir(overflow) in the pattern design which is used for taking gray iron melt overflowing over the level of casting interface. Hub integrated brake discs had fulfilled mechanical strength test of the interface, brake torque test, and metallurgical analysis was done with the samples taken from the discs. As a result, this paper suggests novel concept of hub integrated brake disc manufactured by dualcasting process, and which is suitable for cost effective light weight brake system.