* Stainless Steel Valve Ball, Duplex stainless steel, S.S 316 etc * Over 20 years experience in precision casting and forging Stainless Steel Valve Ball1.Material: Stainless steel, duplex steel, nickel base alloys ... oxidation.3.Process: Investment casting, hot forging.4.Valve accessories, like stems, valve caps, bolts of living, shafts; Pumps, pipes, and other components ...