... :8-35mm 3.High Density,Zero Defects 4.ductile iron piston ring I.Intro:Based on horizontal continuous casting for cast iron ... 7~8,ball number 400~600/mm2 ---compare sand casting, at same strength, elongation increase 50~100%2.ADI(Austempered Ductile ... supply related products in blank, such as cylinder liner,piston ring,ADI bushing,sealing ring,suction pipe etc. By using our profile, the ...