VALVE HITACHI MALLEABLE IRON AND DUCTILE IRON
Malleable Iron with it's benefits of Cast Iron Economy with Cast Steel Strength has long served high industrial standard applicatitons in Steam piping system, LPG, W.O.G. such as Refrigeration, Petrochemical, Crude Oil, Boiler, Heat Exchanger, Shipbuilding and more..
Malleable Iron has supurb mechanical shock resistance even in high temperature such as steam or low temperature such as LPG, Refrigeration, said water and general services making it ideal in great temperature change applications. Outstanding tensile strength and elongations as Malleable Iron provides high yield point which is very important characteristic in limit the distortion to a material.
Hitachi's malleable iron is treated with heat for more than 10 hours to effect graphitization there is no tendency of straining due to heating or casting of casting stress. The valve seat eliminates leakage as it is carefully flnished with a special finishing machine to give it the required hardness. Also in its stability of mec¬hanical properties against temperature change which is an important requirement for any material used under great temperature change of -35c to 350c.