... 2006, by using this tech we manufactured new kind of cast iron profiles ---Cast Iron Hollow Bar , which have been tested by chinese authority ... as cylinder liner,piston ring,ADI bushing,sealing ring,suction pipe etc. By using our profile, the working life of ... have high hardness. G: Compared with casting sand-cast semi-pipe, horizontal continuous casting cast ring sets,cylinder parts can get 30-70 ...