Datong Hydraulic

  H8 Honed tube   is made of high precision steel tube by cold drawing or hot rolling, usually with steel grade ST52, in accordance with   DIN 2391   honed with ISO-tolerance range H8 on the internal diameter. Basic material for manufacturing   hydraulic cylinders   particularly suitable for the industrial, mobile and special applications sector. HOW TO MAKE H8 HONED TUBE The  cold drawn seamless tubes  surface finishing is NBK, where the tubes are phosphate and normalized which provides corrosion resistance. It is oiled inside and outside. Normalize process creates tougher metal product. During normalizing, metals will be heated at a high temperature, and it allowed to naturally cool back down to room temperature by exposure after heating. Metals that have been through this process are more formable, harder and ductile. H8 cylinder Tubes for Hydraulic Applications product overview Series Description: ISO H8 Cylinder Tubes, Inside Honed or Skived ...