What material is the power steering pump made of?

Hello everyone! The power steering pump is classified according to the material, and it is mainly divided into three types: FC-mold, AL-mold and AL D/CAST type. So what are the characteristics of each of them? First of all, the FC-mold is mainly heavy, and it is difficult to process in terms of initial noise, and additional anti-rust treatment such as coating is added. AL-mold is characterized by light weight and good workability. Compared with FC casting, it has better roughness and more processing steps. The appearance is precise, the commodity is excellent, the mold cost is high, the processing is minimized, and the cost is favorable. The new cars are suitable for AL D/C.