... 2.38CrMoAlA+ special alloy 3.Processed to our drawing or OEM. Techincal Advantages of Bimetallic Nitrided treatment Paralllel twin screw barrel : ... and mould, at the same time,it solved the technical problem of low foaming, high foaming,high filling, wear and corrosion ... pellet and mould, at the same time, it solved the technical problem of low foaming, high foaming, high filling, wear and corrosion ...