Yifei Machinery is located in Ningbo, Zhejing,China. We are good at Closed die forged- Closed die forging parts. The weight controled is 0.2-25kg.The material range includes Carbon Steel, Alloy Steel,Stainless steel, etc. We use the processes of quartz drop forging techinics. Those Closed die forged- Closed die forging parts are widely applied in the train, Wagon, Engineering machinery , truck, Ship, Mining machinery, Valves, Drilling rig machinery, construction machinery and so on.