... mining equipment and the parts.1) Sand casting parts material: Gray iron, ductile iron, malleable iron, aluminum, bronze, zinc ... brass. Prisission casting parts: Middle carbon steel, stainless steel ... forged, presision forged, die forged.Gey iron casting: FC20, FC25, FC30, FC35.Ductile casting: FCD40, FCD45, FCD50.2) Weight: 0 ...