... ,Carbon steel, Grey iron 3.Processing: sand casting 4.Foundry. Product Name sand casting ductile iron partsMaterialsCarbon steel, alloy steel ... for specification drawingsPDF, Auto CAD, Solid work,JPG,ProEMain production equipments wax injection, CNC-, -center,Heat treatment Furnace1) We ... after , such as , polishing, and plating2) We make sand casting by foundry and process in Ningbo China3) They are ...