Cast Alloys are typically identified as between the C80000 and C90000 series. They are the most readily available or "off the shelf" group in the Bronze Alloys. Cast Alloys can be manufactured in (3) main ways:
Sand casting is probably the oldest method in practice. In this process the mold is prepared using sand and the molten liquid metal is poured into it. The mold is made of two parts, the cope and the drag. A wooden pattern is placed between these two parts, called the mold cavity. The liquid metal enters here and casts itself. The shape of the mold cavity is similar to the final object after the refining 
The Centrifugal casting process uses a mold which is fixed to a motor on an axis to rotate it at high speeds. The speed of rotation depends on the metal to be cast and the shape required. This method is mainly used for the production of cylindrical components like pipes. As the motor rotates, the metal gets pushed towards the outer walls of the cast and solidifies. The centrifugal process is unsuitable for making linear-shaped and dense objects.